النتائج 1 إلى 6 من 6

الموضوع: عاجل وهام

  1. #1
    Junior Engineer الصورة الرمزية محمد صالح محمد
    تاريخ التسجيل
    Jul 2007
    الدولة
    الجماهيرية العظمى
    المشاركات
    12

    Exclamation عاجل وهام

    السلام عليكم ...
    هذه اول مشاركة لي أو بالأحرى هي طلب .. وفي بدايته أحب أن أشكر الأخوة القائمين على هذا الموقع الأكثر من رائع ومفيد . داعيا الله أن يجعله في ميزان حسناتهم ...
    أما طلب فهو بخصوص الحماية التفاضلية المستعملة في حماية خطوط النقل وقضبان التوزيع والمحولات كيفيتها أو طريقتها وعيوبها ومشكاكلها، وخاصة في خطوط النقل لأني أعمل حاليا في مشروع التخرج وهو بعنوان " تحسين حساسية المرحل التفاضلي الرقمي للأعطال الداخلية في محولات القدرة وقضبان التوزيع وخطوط النقل " وفكرته هو دراسة الحماية التفاضلية العادية للمحولات وخطوط النقل والباص بار والبحث عن مشاكلها وعيوبها ومن ثم تصميم مرحل رقمي لحل هذه المشاكل مستخدمين هنا برنامج الماتلاب ...
    أرجوووووو المساعده لأن الموضوع في غاية الاهمية ... ولكم جزيل الشكر

  2. #2
    عضو رابطة مهندسى الكهرباء العرب الصورة الرمزية رافد الشاوي
    تاريخ التسجيل
    May 2006
    الدولة
    iraq
    المشاركات
    441

    رد: عاجل وهام

    الاخ العزيز
    هناك عوام تؤثر على حساسيه جهاز مناول المسافه
    مثلا اختلاف محولات التيارحيث كما تعلم ان اعتماد مناول التفاضلي على محولات التيار بصوره رئيسه على الجهات المراد حمايتها
    ان طبيعه تشغيل محولات القدره تلتزم عند بدء التشغيل تيار عالي لذلك هي تؤثر على حساسيه المناول
    لان للتغلب على هذه المشاكل يستعمل ملف اضافي للسيطرة على هذه المشاكل مما يؤدي الى عدم حساسيه جهاز الحمايه

  3. #3
    Junior Engineer
    تاريخ التسجيل
    Feb 2006
    الدولة
    مصر
    المشاركات
    4

    رد: عاجل وهام

    بسم الله الرحمن الرحيم
    السلام عليكم ورحمة الله وبركاته
    هذه بعض المعلومات ااتى قد تفيدك
    ولكن ارجو نسخها على ملف PDF كى تجد فيها المفيد
    MiCOM P541, P542,
    P543, P544, P545, P546  
    *******S
    1. REFERENCE CONDITIONS 7
    2. PROTECTION FUNCTIONS 8
    2.1 Phase current differential protection 8
    2.1.1 Phase current biased differential characteristic settings 8
    2.1.2 Phase current differential high set characteristic settings (P541 and P542) 8
    2.1.3 Differential protection operating and reset times 8
    2.1.4 Inverse time (IDMT) characteristic 8
    2.1.4.1 Required Time Multiplier Settings for IEC/UK curves 9
    2.1.4.2 Required Time Dial Settings for IEEE/US curves 9
    2.1.4.3 Definite time characteristic 9
    2.1.5 Capacitive cable charging current settings (P543, P544, P545 and P546) 10
    2.1.6 Vectorial compensation settings (P541 and P542) 10
    2.1.7 Current transformer ratio compensation setting 10
    2.1.8 Accuracy 10
    2.2 Three Phase Non-Directional / Directional Overcurrent Protection 11
    2.2.1 Setting ranges 11
    2.2.2 Time delay settings 11
    2.2.2.1 Inverse Time (IDMT) Characteristic 11
    2.2.2.2 Time Multiplier Settings for IEC/UK curves 12
    2.2.2.3 Time Dial Settings for IEEE/US curves 12
    2.2.2.4 Definite Time Characteristic 12
    2.2.2.5 Reset Characteristics 12
    2.2.3 Accuracy 13
    2.2.4 IEC IDMT Curves 14
    2.2.5 ANSI/IEEE IDMT curves 15
    2.3 Earth Fault Protection 16
    2.3.1 Setting ranges 16
    2.3.1.1 Earth Fault, Sensitive Earth Fault 16
    2.3.1.2 Polarising Quantities for Earth Fault Measuring Elements (Models P543, P544, P545, &
    P546 only) 16
    2.3.2 EF and SEF time delay characteristics 16
    2.3.3 Wattmetric SEF settings - P543, P544, P545 & P546 (Zero sequence power settings) 16
    2.3.4 Accuracy 17
    2.3.4.1 Earth fault 17
    2.3.4.2 SE F 17

     
    
     
     
    
    
    
     
    
    
    
    
    
    2.3.4.3 Wattmetric SEF 17
    2.3.4.4 Polarising Quantities 17
    2.4 Undercurrent 18
    2.4.1 Setting ranges 18
    2.4.2 Accuracy 18
    2.5 Broken Conductor Logic 18
    2.5.1 Setting ranges 18
    2.5.2 Accuracy 18
    2.6 Transient Overreach and Overshoot 18
    2.6.1 Accuracy 18
    2.7 Thermal Overload 18
    2.7.1 Setting ranges 18
    2.7.2 Accuracy 19
    2.8 Distance protection {P543, P544, P545 and P546} 19
    2.8.1 Setting ranges 19
    2.8.2 Accuracy 19
    2.9 Stub bus protection {P544 & P546} 19
    2.9.1 Accuracy 19
    2.10 Direct transfer trip and inter-relay command transfer 20
    2.11 Permissive intertrip 20
    2.11.1 Setting ranges 20
    2.11.2 Accuracy 20
    2.12 Single phase output contacts {P543, P544, P545 and P546} 20
    2.12.1 Accuracy 20
    2.13 Protection signalling channel, dual redundancy, channel failure, propagation time
    check and error statistics 20
    2.13.1 Setting ranges 20
    2.13.2 Accuracy 21
    2.14 Compatibility with External interfaces 21
    2.14.1 P590 Series optical fibre to electrical interface units – Performance 21
    2.14.2 P594 GPS Synchronising Module 21
    3. SUPERVISORY FUNCTIONS 22
    3.1 Voltage Transformer Supervision {P543, P544, P545 and P546} 22
    3.1.1 Setting level 22
    3.1.2 Accuracy 22
    3.2 Programmable scheme logic 22
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    3.2.1 Level settings 22
    3.2.2 Accuracy 22
    4. CONTROL 23
    4.1 Autoreclose {P542, P543 and P545} 23
    4.1.1 Level settings 23
    4.1.2 Accuracy 23
    4.2 Display Control and Setting Groups 23
    4.2.1 Level settings 23
    4.2.2 Performance 23
    4.3 Differential protection re-configuration/inhibit current differential protection 23
    4.3.1 Performance 23
    5. MEASUREMENTS AND RECORDING FACILITIES 24
    5.1 Measurements 24
    5.2 IRIG-B and Real Time Clock 24
    5.2.1 Features 24
    5.2.2 Performance 24
    6. POST FAULT ANALYSIS 25
    6.1 Fault Records 25
    6.1.1 Features 25
    6.1.2 Performance 25
    6.2 Disturbance Records 25
    6.2.1 Level settings 25
    6.2.2 Accuracy 25
    6.3 Fault Locator Settings {P543, P544, P545 and P546} 26
    6.3.1 Level settings 26
    6.3.2 Accuracy 26
    7. PLANT SUPERVISION 26
    7.1 CB State Monitoring Control and Condition Monitoring 26
    7.1.1 Level settings 26
    7.1.2 Accuracy 26
    7.2 CB State Monitoring Control, breaker fail and backtrip, breaker fail timer 26
    7.2.1 Level settings 26
    7.2.2 Accuracy 26
    8. LOCAL AND REMOTE COMMUNICATIONS 27
    8.1 Front Port 27
    8.2 Rear Port 1 27

     
    
     
     
    
    
    
     
    
    
    
    
    
    8.2.1 Performance 27
    8.3 Second Rear Communication Port 28
    8.4 Ethernet Communications (P543, P544, P545 and P546) 28
    9. DIAGNOSTICS 29
    9.1 Features 29
    9.2 Performance 29
    10. RATINGS 30
    10.1 Nominal ratings 30
    10.1.1 Currents (All P540 range) 30
    10.1.2 Voltage inputs (All P540 range) 30
    10.1.3 Auxiliary voltages (All P540 range + P594 as indicated) 30
    10.1.3.1 P540 range 30
    10.1.3.2 P594 31
    10.1.4 ‘Universal’ Logic inputs (P540 range) 31
    10.1.5 Output contacts (P540 range) 31
    10.1.6 Field voltage (P540 range) 31
    10.2 Burdens 31
    10.2.1 Current (P540 range) 31
    10.2.2 Voltage (P540 range) 31
    10.2.3 Auxiliary voltage 32
    10.2.3.1 P540 range 32
    10.2.3.2 P594 GPS Module 32
    10.2.4 Logic inputs (P540 range) 32
    10.2.5 Optically isolated inputs 32
    11. CT REQUIREMENTS (P540 RANGE) 33
    11.1 Current differential protection 33
    11.2 Earth fault protection 33
    12. HIGH VOLTAGE WITHSTAND (P540 RANGE & P594) 34
    12.1 Dielectric withstand, impulse, insulation resistance and ANSI test requirements
    insulation test voltage 34
    12.1.1 Impulse 34
    12.1.2 Dielectric withstand 34
    12.1.3 ANSI dielectric withstand 34
    12.1.4 Insulation resistance 34
    13. ELECTRICAL ENVIRONMENT 35
    13.1 Performance criteria 35
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546 
    
    13.1.1 Class A 35
    13.1.2 Class B 35
    13.1.3 Class C 35
    13.2 Auxilary supply tests, dc interruption, etc. 35
    13.2.1 DC voltage interruptions 35
    13.2.1.1 P540 RANGE 35
    13.2.2 DC voltage fluctuations 36
    13.2.2.1 P540 range 36
    13.2.2.2 P594 GPS Receiver Module 36
    13.3 AC voltage dips and short interruptions 36
    13.3.1 AC Voltage short interruptions 36
    13.3.1.1 P540 range 36
    13.3.2 AC voltage dips 36
    13.3.2.1 P540 range 36
    13.4 High Frequency Disturbance IEC 60255-22-1:1988 Class III. (P540 range & P594 GPS
    Receiver) 36
    13.5 Conducted / Radiated emissions (P540 range & P594 GPS Receiver) 37
    13.5.1 Conducted emissions 37
    13.6 Conducted / Radiated Immunity (P540 range & P594 GPS Receiver) 37
    13.6.1 Conducted immunity 37
    13.6.2 Radiated immunity 37
    13.6.3 Radiated immunity from digital radio telephones 37
    13.7 Electrostatic Discharge (P540 range & P594 GPS Receiver) 37
    13.8 Surge Immunity (P540 range & P594 GPS Receiver) 38
    13.9 Power Frequency Interference (P540 range & P594 GPS Receiver) 38
    13.10 Surge Withstand Capability (SWC) - (P540 range & P594 GPS Receiver) 38
    13.11 Radiated Immunity (P540 range & P594 GPS Receiver) 38
    13.12 Power Frequency Magnetic Field IMMUNITY (P540 range & P594 GPS Receiver) 38
    13.13 Pulse Magnetic Field IMMUNITY (P540 range & P594 GPS Receiver) 39
    13.14 Damped oscillatory Magnetic Field IMMUNITY (P540 range & P594 GPS Receiver) 39
    13.15 Oscillatory waves immunity test (P540 range) 39
    14. ATMOSPHERIC ENVIRONMENT 40
    14.1 Temperature (P540 range & P594 GPS Receiver) 40
    14.2 Humidity (P540 range & P594 GPS Receiver) 40
    14.3 Enclosure protection (P540 range & P594 GPS Receiver) 40
    15. MECHANICAL ENVIRONMENT (P540 RANGE & P594 GPS RECEIVER) 41
    15.1 Performance criteria 41

     
    
     
     
    
    
    
     
    
    
    
    
    
    15.1.1 Severity Classes 41
    15.1.2 Vibration (sinusoidal) 41
    15.1.3 Shock and bump 41
    15.1.4 Seismic 42
    16. INFLUENCING QUANTITIES 42
    16.1 Harmonics (P540 range) 42
    16.2 Frequency (P540 Range) 42
    17. APPLICATION SPECIFIC 43
    17.1 Magnetising Inrush Current {P541 and P542} 43
    17.1.1 Level settings 43
    17.1.2 Accuracy 43
    17.2 Stability tests during current reversal conditions (P540 range) 43
    17.2.1 Features 43
    17.3 Performance 43
    17.4 Capacitive charging current compensation {P543, P544, P545 and P546} 43
    17.4.1 Level settings 43
    17.4.2 Performance 43
    17.5 Transient bias characteristic for switched communication channels (P540 range –
    GPS Disable for P545/P546) 43
    17.5.1 Level settings 43
    17.5.2 Performance 43
    18. MISCELLANEOUS 44
    18.1 Analogue inputs, Logic inputs, Outputs relays (P540 range) 44
    18.2 Front user interface (P540 range) 44
    18.3 Battery life (P540 range) 44
    18.4 Frequency tracking (P540 range) 44
    18.5 K-Bus compatibility (P540 range) 45
    19. EC EMC COMPLIANCE (P540 RANGE, P594 GPS RECEIVER) 45
    20. EC LVD COMPLIANCE (P540 RANGE, P594 GPS RECEIVER) 45
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    1. REFERENCE CONDITIONS
    The accuracy claims within this ******** are relevant for a relay operating under the
    following reference conditions.
    Quantity Reference conditions Test tolerance
    General
    Ambient temperature 20 °C ±2°C
    Atmospheric pressure 86kPa to 106kPa -
    Relative humidity 45 to 75 % -
    Input energising quantity Reference conditions Test tolerance
    Current Ιn ±5%
    Voltage Vn ±5%
    Frequency 50 or 60Hz ±0.5%
    Auxiliary supply DC 24V, 48V or 110V
    AC 63.5V or 110V
    ±5%
    Settings Reference value
    Time Multiplier Setting 1.0
    Time Dial (Software 30 or
    later)
    1
    Time Dial 7

     
    
     
     
    
    
    
     
    
    
    
    
    
    2. PROTECTION FUNCTIONS
    The following functional claims are applicable to the P540 range of current differential relays.
    Note however that not all the protection functions listed below are applicable to every relay.
    2.1 Phase current differential protection
    2.1.1 Phase current biased differential characteristic settings
    Name Range Step Size
    Ιs1 0.2 - 2.0Ιn 0.05Ιn
    Ιs2 1.0 – 30Ιn 0.05Ιn
    K1 30 – 150% 5%
    Characteristic shape determined by the following formula:
    For Ιbias ≤ Ιs2
    |Ιdiff| = k1|Ιbias|+ ΙS1
    For Ιbias > Ιs2
    |Ιdiff| = k2|Ιbias|- (k2 - k2).ΙS2 + ΙS1
    Ιs1
    Ιs2 Bias Current (Ιbias)
    Differential Current
    (Ιdiff)
    RESTRAIN
    OPERATE
    Percentage
    bias k1
    Percentage bias
    k2
    Biased Current Differential Characteristic
    2.1.2 Phase current differential high set characteristic settings (P541 and P542)
    Name Range Step Size
    Ι Diff >> 4.0 - 32.0Ιn 0.01Ιn
    2.1.3 Differential protection operating and reset times
    The time delay is user selectable as inverse time or definite time characteristics:
    2.1.4 Inverse time (IDMT) characteristic
    IDMT characteristics shall be selectable from a choice of four IEC/UK and five IEEE/US
    curves as shown in the table overleaf.
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    The IEC/UK IDMT curves conform to the following formula:
    t = T x
       
       
    K
    (Ι/Ιs) α- 1
    + L
    The IEEE/US IDMT curves conform to the following formula:
    t = TD x
      
      
    K
    (Ι/Ιs)α - 1 + L
    Where t = operation time
    K = constant
    Ι = measured current
    ΙS = current threshold setting
    α = constant
    L = ANSI/IEEE constant (zero for IEC/UK curves)
    T = Time Multiplier Setting for IEC/UK curves
    TD = Time Dial Setting for IEEE/US curves
    IDMT Curve de******ion Standard K Constant α Constant L Constant
    Standard Inverse IEC 0.14 0.02 0
    Very Inverse IEC 13.5 1 0
    Extremely Inverse IEC 80 2 0
    Long Time Inverse UK 120 1 0
    Moderately Inverse IEEE 0.0515 0.02 0.114
    Very Inverse IEEE 19.61 2 0.491
    Extremely Inverse IEEE 28.2 2 0.1217
    Inverse US-C08 5.95 2 0.18
    Short Time Inverse US-C02 0.16758 0.02 0.11858
    2.1.4.1 Required Time Multiplier Settings for IEC/UK curves
    Name Range Step Size
    TMS 0.025 to 1.2 0.025
    2.1.4.2 Required Time Dial Settings for IEEE/US curves
    Name Range Step Size
    TD (software 30 or
    later)
    0.1 - 100 0.05
    TD 0.05 - 15 0.01
    2.1.4.3 Definite time characteristic
    Range Step Size
    0 to 100s 0.01s
    The reset characteristics shall be instantaneous and shall typically be less than 60ms plus
    protection channel signalling time.

     
    
     
     
    
    
    
      
    
    
    
    
    
    2.1.5 Capacitive cable charging current settings (P543, P544, P545 and P546)
    Name Range Step Size
    Susceptance 10nmho*Ιn to 10mho*Ιn 10nmho*Ιn
    2.1.6 Vectorial compensation settings (P541 and P542)
    Setting Phase shift Action
    Yy0 0° Do nothing
    Yd1 30° lag Ιa = (ΙA - ΙC) / 3
    Ιb = (ΙB - ΙA) / 3
    Ιc = (ΙC - ΙB) / 3
    Where Ιa, Ιb
    and Ιc are the
    corrected
    currents and
    Yy2 60° lag Ιa = -ΙC
    Ιb = -ΙA
    Ιc = - ΙB
    ΙA, ΙB and ΙC
    are the
    uncorrected
    phase
    currents
    Yd3 90° lag Ιa = (ΙB - ΙC) / 3
    Ιb = (ΙC - ΙA) / 3
    Ιc = (ΙA - ΙB) / 3
    Yy4 120° lag Ιa = ΙB
    Ιb = ΙC
    Ιc = ΙA
    Yd5 150° lag Yd11 and Invert
    Yy6 180° lag Invert currents
    Yd7 150° lead Yd1 and Invert
    Yy8 120° lead Ιa = ΙC
    Ιb = ΙA
    Ιc = ΙB
    Yd9 90° lead Yd3 and Invert
    Yy10 60° lead Ιa = -ΙB
    Ιb = -ΙC
    Ιc = -ΙA
    Yd11 30° lead Ιa = (ΙA - ΙB) / 3
    Ιb = (ΙB - ΙC) / 3
    Ιc = (ΙC - ΙA) / 3
    Ydy0 0° Ιa = ΙA - (ΙA + ΙB + ΙC) / 3
    Ιb = ΙB - (ΙA + ΙB + ΙC) / 3
    Ιc = ΙC - (ΙA + ΙB + ΙC) / 3
    Ydy6 180° lag Ydy0 and Invert
    2.1.7 Current transformer ratio compensation setting
    Name Range Step Size
    Phase CT ratio correction 1 - 8 0.01
    2.1.8 Accuracy
    Pick-up Formula ±10%
    Drop-off 0.75 x Formula ±10%
    IDMT characteristic shape ±5% or 40ms whichever is greater
    DT operation ±2% or 20ms whichever is greater
    Instantaneous Operation <30ms
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    Reset time <60ms
    Repeatability ±2.5%
    Characteristic UK curves IEC 60255-3 – 1998
    US curves IEEE C37.112 – 1996
    Vector compensation No affect on accuracy
    Current transformer ratio compensation No affect on accuracy
    High set characteristic setting No affect on accuracy
    Two ended scheme operation No affect on accuracy
    Three ended scheme operation No affect on accuracy
    2.2 Three Phase Non-Directional / Directional Overcurrent Protection
    2.2.1 Setting ranges
    Stage Range Step size
    Phase element 1st Stage 0.08 – 4.0Ιn 0.01Ιn
    2nd Stage 0.08 – 4.0Ιn 0.01Ιn
    3rd Stage 0.08 - 32Ιn 0.01Ιn
    4th Stage 0.08 - 32Ιn 0.01Ιn
    Directional overcurrent settings (P543, P544, P545 and P546 only):
    Range Step Size
    Relay characteristic angle -95° to +95° 1
    2.2.2 Time delay settings
    Each overcurrent element has an independent time setting and each time delay is capable of
    being blocked by an optically isolated input:
    Element Time delay type
    1st Stage Definite Time (DT) or IDMT
    2nd Stage DT or IDMT
    3rd Stage DT
    4th Stage DT
    Curve type Reset time delay
    IEC / UK curves DT only
    All other IDMT or DT
    2.2.2.1 Inverse Time (IDMT) Characteristic
    IDMT characteristics are selectable from a choice of four IEC/UK and five IEEE/US curves
    as shown in the table below.
    The IEC/UK IDMT curves conform to the following formula:
    t = T x
       
       
    K
    (Ι/Ιs) α- 1
    + L
    The IEEE/US IDMT curves conform to the following formula:
    t = TD x
      
      
    K
    (Ι/Ιs)α - 1 + L

     
    
     
     
    
    
    
     
    
    
    
    
    
    Where: t = operation time
    K = constant
    Ι = measured current
    ΙS = current threshold setting
    α = constant
    L = ANSI/IEEE constant (zero for IEC/UK curves)
    T = Time Multiplier Setting for IEC/UK curves
    TD = Time Dial Setting for IEEE/US curves
    IDMT Curve de******ion Standard K Constant α Constant L Constant
    Standard Inverse IEC 0.14 0.02 0
    Very Inverse IEC 13.5 1 0
    Extremely Inverse IEC 80 2 0
    Long Time Inverse UK 120 1 0
    Moderately Inverse IEEE 0.0515 0.02 0.114
    Very Inverse IEEE 19.61 2 0.491
    Extremely Inverse IEEE 28.2 2 0.1217
    Inverse US-C08 5.95 2 0.18
    Short Time Inverse US-C02 0.16758 0.02 0.11858
    2.2.2.2 Time Multiplier Settings for IEC/UK curves
    Name Range Step Size
    TMS 0.025 to 1.2 0.025
    2.2.2.3 Time Dial Settings for IEEE/US curves
    Name Range Step Size
    TD (Software 30 or
    later)
    0.1 to 100 0.01
    TD 0.05-15 0.05
    2.2.2.4 Definite Time Characteristic
    Element Range Step Size
    All stages 0 to 100s 10ms
    2.2.2.5 Reset Characteristics
    For all IEC/UK curves, the reset characteristic is definite time only.
    For all IEEE/US curves, the reset characteristic can be selected as either inverse curve or
    definite time.
    The definite time can be set (as defined in IEC) to zero. Range 0 to 100 seconds in steps of
    0.01 seconds.
    The Inverse Reset characteristics are dependent upon the selected IEEE/US IDMT curve as
    shown in the table below.
    All inverse reset curves conform to the following formula:
    tReset = TD x
      
      
    tr
    1 - (Ι/Ιs) α
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    Where: tReset = reset time
    tr = constant
    Ι = measured current
    ΙS = current threshold setting
    α = constant
    TD = Time Dial Setting (Same setting as that employed by IDMT
    curve)
    IEEE/US IDMT
    Curve de******ion
    Standard tr Constant α Constant
    Moderately Inverse IEEE 4.85 2
    Very Inverse IEEE 21.6 2
    Extremely Inverse IEEE 29.1 2
    Inverse US-C08 5.95 2
    Short Time Inverse US-C02 2.261 2
    Inverse Reset Characteristics
    2.2.3 Accuracy
    Pick-up Setting ±5%
    Drop-off 0.95 x Setting ±5%
    Minimum trip level of IDMT elements 1.05 x Setting ±5%
    IDMT characteristic shape ±5% or 40ms whichever is greater
    (under reference conditions)*
    IEEE reset ±5% or 40ms whichever is greater
    DT operation ±2% or 50ms whichever is greater
    DT reset Setting ±5%
    Directional boundary accuracy (RCA ±90°) ±2° hysteresis 2°
    Characteristic UK curves IEC 60255-3 – 1998
    US curves IEEE C37.112 – 1996
    * Reference conditions TMS=1, TD=1 and Ι> setting of 1A, accuracy operating range 2-20Ιs

     
    
     
     
    
    
    
     
    
    
    
    
    
    2.2.4 IEC IDMT Curves
    
















    
     
    
    
     
    
    
    
    !
    Curve 1 Standard Inverse
    Curve 2 Very Inverse
    Curve 3 Extremely Inverse
    Curve 4 UK Long Time Inverse
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    
    2.2.5 ANSI/IEEE IDMT curves
    


    
    
    
    
      
    

      
    
    
      !
    
    
    "
    
    #
    
    $
    
    %
    
    &
    '( '()
    Curve 5 IEEE Moderately inverse
    Curve 6 IEEE Very inverse
    Curve 7 IEEE Extremely inverse
    Curve 8 US Inverse
    Curve 9 US Short time inverse

     
    
     
     
    
    
    
     
    
    
    
    
    
    2.3 Earth Fault Protection
    2.3.1 Setting ranges
    2.3.1.1 Earth Fault, Sensitive Earth Fault
    Range Step Size
    Earth Fault 1st Stage 0.08 - 4.0Ιn 0.01Ιn
    2nd Stage 0.08 - 4.0Ιn 0.01Ιn
    3rd Stage 0.08 – 32Ιn 0.01Ιn
    4th Stage 0.08 – 32Ιn 0.01Ιn
    Sensitive Earth Fault 1st Stage 0.005 – 0.1Ιn 0.00025Ιn
    2nd Stage 0.005 – 0.1Ιn 0.00025Ιn
    3rd Stage 0.005 – 0.8Ιn 0.001Ιn
    4th Stage 0.005 – 0.8Ιn 0.001Ιn
    2.3.1.2 Polarising Quantities for Earth Fault Measuring Elements (Models P543, P544, P545, &
    P546 only)
    Zero sequence voltage polarisation
    Range Step size
    Voltage threshold Vop> 0.5 – 80V 0.5V
    Negative sequence polarisation
    Range Step size
    Current threshold Ι2p> 0.08 - 1.0Ιn 0.01Ιn
    Voltage threshold V2p> 0.5 – 25V 0.5V
    Characteristic angle -95° to +95° 1°
    2.3.2 EF and SEF time delay characteristics
    The earth-fault measuring elements for EF and SEF are followed by an independently
    selectable time delay. These time delays are identical to those of the Phase Overcurrent
    time delay. The reset time delay is the same as the Phase overcurrent reset time.
    2.3.3 Wattmetric SEF settings - P543, P544, P545 & P546 (Zero sequence power settings)
    Name Range Step size
    PN> 0 - 20W (Rating = 1A, 100/120V) 0.05W
    0 - 100W (Rating = 5A, 100/120V) 0.25W
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    2.3.4 Accuracy
    2.3.4.1 Earth fault
    Pick-up Setting ±5%
    Drop-off >0.85 x Setting
    Minimum trip level of IDMT elements 1.05 x Setting ±5%
    IDMT characteristic shape ±5% or 40ms whichever is greater
    (under reference conditions)*
    IEEE reset ±10% or 40ms whichever is greater
    DT operation ±2% or 50ms whichever is greater
    DT reset ±5% or 50ms whichever is greater
    Repeatability 7.5%
    * Reference conditions TMS=1, TD=1 and ΙN> setting of 1A, accuracy operating range 2-
    20Ιs
    2.3.4.2 SEF
    Pick-up Setting ±5%
    Drop-off 0.95 x Setting ±5%
    Minimum trip level of IDMT elements 1.05 x Setting ±5%
    IDMT characteristic shape ±5% or 40ms whichever is greater (under
    reference conditions)*
    IEEE reset ±17.5% or 60ms whichever is greater
    DT operation ±2% or 50ms whichever is greater
    DT reset ±5% or 50ms whichever is greater
    Repeatability 5%
    * Reference conditions TMS=1, TD=1 and ΙN> setting of 100mA, accuracy operating range
    2-20Ιs
    2.3.4.3 Wattmetric SEF
    Pick-up For
    P=0W
    ISEF> ±5% or 5mA
    For
    P>0W
    P> ±5%
    Drop-off For
    P=0W
    (0.95 x ISEF>) ±5% or 5mA
    For
    P>0W
    0.9 x P> ±5%
    Boundary accuracy ±5% with 1° hysteresis
    Repeatability 1%
    2.3.4.4 Polarising Quantities
    Zero Sequence Polarising
    Operating boundary pick-up ±2°of RCA ±90°
    Hysteresis <3°
    VN> Pick-up Setting ±10%
    VN> Drop-off 0.9 x Pick-up +/-10%

     
    
     
     
    
    
    
     
    
    
    
    
    
    Negative Sequence Polarising
    Operating boundary pick-up ±2°of RCA ±90°
    Hysteresis <2°
    V2> Pick-up Setting ±10%
    V2> Drop-off 0.9 x Pick-up ±10%
    Ι2> Pick-up Setting ±10%
    Ι2> Drop-off 0.9 x Pick-up+/-10%
    2.4 Undercurrent
    2.4.1 Setting ranges
    Name Range Step size
    Phase Ι < 0.02 - 3.2Ιn 0.01Ιn
    Earth ΙN SENSITIVE< 0.001 - 0.8Ιn 0.0005Ιn
    2.4.2 Accuracy
    Pick-up ±10% or 25mA whichever is the greater
    Operating time <12ms
    Reset <15ms
    2.5 Broken Conductor Logic
    2.5.1 Setting ranges
    Settings Range Step size
    Ι2/ Ι1 0.2 - 1.0 0.01
    Time delay 0 – 100s 0.1s
    2.5.2 Accuracy
    Pick-up Setting ±2.5%
    Drop-off 0.95 x Setting ±2.5%
    DT operation ±2% or 50ms whichever is greater
    Reset <25ms
    2.6 Transient Overreach and Overshoot
    2.6.1 Accuracy
    Additional tolerance due to increasing X/R ratios ±5% over the X/R ratio of 1 to 90
    Overshoot of overcurrent elements <40ms
    2.7 Thermal Overload
    2.7.1 Setting ranges
    Name Setting Range Step Size
    Time constant Single or Dual -
    Thermal trip current Ιθ>> 0.08 - 4 ΙN 0.01 ΙN
    Thermal alarm θ> 50 - 100% of θ>> 1% of θ>>
    Time constant τ1 1 - 200 minutes 1 minute
    Time constant τ2 1 - 200 minutes 1 minute
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    2.7.2 Accuracy
    Pick-up Thermal alarm Calculated trip time ±10%*
    Thermal overload Calculated trip time ±10%*
    Repeatability <5%
    * Operating time measured with applied current of 20% above thermal setting.
    2.8 Distance protection {P543, P544, P545 and P546}
    2.8.1 Setting ranges
    Name Setting Range Step Size
    Zone 1 reach, Z1 0.1/Ιn Ω - 250/Ιn Ω 0.01/Ιn Ω
    Zone 2 reach, Z2 0.1/Ιn Ω - 250/Ιn Ω 0.01/Ιn Ω
    Zone 3 reach, Z3 0.1/Ιn Ω - 250/Ιn Ω 0.01/Ιn Ω
    Line angle 20 – 85° 1°
    Zone 1 timer, tZ1 0 – 10s 0.01s
    Zone 2 timer, tZ2 0 – 10s 0.01s
    Zone 3 timer, tZ3 0 – 10s 0.01s
    KZN Res comp 0 – 7 0.01
    KZN angle -180 - +90° 1°
    RPh 0.1 – 200/Ιn Ω 0.01/Ιn Ω
    RG 0.1 – 400/Ιn Ω 0.01/Ιn Ω
    Delta R (PSB) 0.1 – 400/Ιn Ω 0.01/Ιn Ω
    Delta X (PSB) 0.1 – 400/Ιn Ω 0.01/Ιn Ω
    tZ6 (PSB) 0 – 100ms 1ms
    2.8.2 Accuracy
    Characteristic shape SIR<30 ±5%
    SIR>30 ±10%
    Instantaneous operating time <50ms
    Reset time <60ms
    Time delay operation Setting ±50ms or 5% whichever is greater
    Hysteresis ±5%
    Repeatability 5%
    Distance sensitivity settings <5/Ιn Ω (0.05Ιn*5/(setting* Ιn)) ±5%
    settings >5/Ιn Ω 0.05Ιn ±5%
    Power swing blocking timer ±5%
    2.9 Stub bus protection {P544 & P546}
    2.9.1 Accuracy
    See Section 2.1.8.

     
    
     
     
    
    
    
      
    
    
    
    
    
    2.10 Direct transfer trip and inter-relay command transfer
    Method Time (plus protection
    signalling time)
    Time for intertrip opto-input relay end A – output contact end B (opto
    with filter)
    40ms
    Time for intertrip opto-input relay end A – output contact end B (opto
    without filter)
    30ms
    Time for command transfer end A – PSL end B 15ms
    2.11 Permissive intertrip
    2.11.1 Setting ranges
    Name Setting Range Step Size
    Permissive intertrip timer 0 – 200 ms 5 ms
    2.11.2 Accuracy
    Operating level Ιs1 ±5%
    Drop off level 0.75 * Ιs1 ±10%
    Instantaneous operating time 40ms + protection signalling channel time + permissive
    intertrip timer
    Reset time <40ms
    Timer accuracy Setting ±2% or 5ms whichever is greater
    2.12 Single phase output contacts {P543, P544, P545 and P546}
    2.12.1 Accuracy
    Tripping Three pole or single and three pole
    2.13 Protection signalling channel, dual redundancy, channel failure, propagation time
    check and error statistics
    2.13.1 Setting ranges
    Name Setting Range Step Size
    Data rate 56 or 64kb/s -
    Scheme setting 2 terminal, 3 terminal or dual redundant -
    Clock setting Internal or external -
    Address 0, 1A, 1B, 1C to 20A, 20B, 20C 1
    Communications failure
    mode (dual redundant)
    Channel 1, channel 2 and channel 1 & 2 -
    Comm. fail timer 0.1 – 10s 0.1s
    Comms Mode (Software 30
    or later)
    Standard or IEEE C37.94
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    2.13.2 Accuracy
    Data rate setting No affect on protection operation
    Operation with internal/external clock No affect on protection operation
    Scheme setting Relay configurable as either 2 terminal, 3 terminal or
    dual redundant
    Addressing Allocation of an incorrect address causes the signal
    channel failure alarm
    Channel failure alarm Alarm raised when appropriate channel fails
    Comm. fail timer Setting ±100ms
    Model compatibility P541 and P542 compatible
    P543, P544, P545 & P546 compatible
    Connection of a relay with a non-compatible model
    produces an error message
    2.14 Compatibility with External interfaces
    2.14.1 P590 Series optical fibre to electrical interface units – Performance
    P541, P542, P543, P544, P545, P546 are compatible with following
    interfaces
    P591, P592, P593
    2.14.2 P594 GPS Synchronising Module
    P594 GPS Module Output One pulse per second Synchronising Signal

     
    
     
     
    
    
    
     
    
    
    
    
    
    3. SUPERVISORY FUNCTIONS
    The following claims for Supervisory Functions are applicable to the P540 range of current
    differential relays (model specific as detailed).
    3.1 Voltage Transformer Supervision {P543, P544, P545 and P546}
    3.1.1 Setting level
    Name Range Step Size
    Timer 1.0 - 10s 0.1s
    Negative Sequence Voltage threshold (V2) 10V (100/120V) Fixed
    Phase overvoltage P.U. 30V, DO 10V
    (100/120V)
    Fixed
    Phase overcurrent 0.08Ιn to 32Ιn 0.01Ιn
    Superimposed current2 0.1Ιn Fixed
    Negative Sequence Current threshold (Ι2) 0.05Ιn - 0.5Ιn 0.01
    VTS Time Delay 1.0 - 10s 0.1s
    3.1.2 Accuracy
    Fast block operation <1 cycle
    Fast block reset <1.5 cycles
    Time delay Setting ±2% or 20ms whichever is greater
    3.2 Programmable scheme logic
    3.2.1 Level settings
    Name Range Step Size
    Time delay t 0-14400000ms 1ms
    3.2.2 Accuracy
    Output conditioner timer Setting ±2% or 50ms whichever is greater
    Dwell conditioner timer Setting ±2% or 50ms whichever is greater
    Pulse conditioner timer Setting ±2% or 50ms whichever is greater
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    4. CONTROL
    The following claims for Control Functions are applicable to the P540 range of current
    differential relays (model specific as detailed).
    4.1 Autoreclose {P542, P543 and P545}
    4.1.1 Level settings
    Name Range Step Size
    Number of shots {P542} 1 – 4 1
    Single pole shot {P543 & P545} 1 – 4 1
    Three pole shot {P543 & P545} 1 – 4 1
    1 pole dead time {P543 & P545} 0.2 – 5s 0.01s
    Dead time 1 {P542} 0.01s – 300s 0.01s
    {P543 & P545} 0.2s – 30s 0.01s
    Dead time 2 {P542} 0.01s – 300s 0.01s
    {P543 & P545} 1s – 1800s 1s
    Dead time 3 {P542} 0.01s – 9999s 0.01s
    {P543 & P545} 1s – 3600s 1s
    Dead time 4 {P542} 0.01s – 9999s 0.01s
    {P543 & P545} 1s – 3600s 1s
    CB healthy time 0.01s – 9999s 0.01s
    Reclaim time 1s – 600s 0.01s
    AR Inhibit wind 0.01s – 600s 0.01s
    Close pulse {P543 & P545} 0.1s – 10s 0.01s
    Check sync time 0.01s – 9999s 0.01s
    4.1.2 Accuracy
    Timers Setting ±2% or 20ms whichever is greater
    4.2 Display Control and Setting Groups
    4.2.1 Level settings
    Settings Range Step size
    Setting groups 1 - 4 1
    4.2.2 Performance
    Setting groups 4 independent setting groups including independent
    programmable scheme logic for each group.
    4.3 Differential protection re-configuration/inhibit current differential protection
    4.3.1 Performance
    Current differential algorithm blocked by
    Energising the opto input assigned to inhibit current differential protection Compliant
    Unhealthy communications link Compliant
    Loss of power supply to any relay Compliant

     
    
     
     
    
    
    
     
    
    
    
    
    
    5. MEASUREMENTS AND RECORDING FACILITIES
    The following claims for Measurement & Recording facilities are applicable to the P540
    range of current differential relays (model specific as detailed).
    5.1 Measurements
    Typically ±1%, but ±0.5% between 0.2 – 2Ιn/Vn.
    Accuracy under reference conditions.
    Measurand Range Accuracy
    Phase current 0.05 to 3 Ιn ±1.0% of reading
    Sensitive earth fault Current 0.5 to 2.5 Ιn
    0.1 to 0.5 Ιn
    ±1.0% of reading
    ±5.0% of reading
    Phase local current 0.05 to 3 Ιn ±1.0% of reading or ±(f-fn)/fn %
    Phase remote current 0.05 to 3 Ιn ±1.0% of reading or ±(f-fn)/fn %
    Phase differential current 0.05 to 3 Ιn ±5.0%
    Bias current 0.05 to 3 Ιn ±5.0%
    Voltage 0.05 to 2 Vn ±1.0% of reading
    Power (W) 0.2 to 2 Vn
    0.05 to 3 Ιn
    ±5.0% of reading at unity power factor
    Reactive Power (VArs) 0.2 to 2 Vn
    0.05 to 3 Ιn
    ±5.0% of reading at unity power factor
    Apparent Power (VA) 0.2 to 2 Vn
    0.05 to 3 Ιn
    ±5.0% of reading at unity power factor
    Energy (Wh) 0.2 to 2 Vn
    0.2 to 3 Ιn
    ±5% of reading at unity power factor
    Energy (Varh) 0.2 to 2 Vn
    0.2 to 3 Ιn
    ±5% of reading at zero power factor
    Phase accuracy 0° to 360° ±2°
    Frequency 45 to 65Hz ±1%
    Power frequency 0° to 120° ±5%
    5.2 IRIG-B and Real Time Clock
    5.2.1 Features
    Real time 24 hour clock settable in hours, minutes and seconds
    Calendar settable from January 1994 to December 2092
    Clock and calendar maintained via battery after loss of auxiliary supply
    Internal clock synchronisation using IRIG-B
    Time synchronisation by energisation of opto input
    5.2.2 Performance
    Year 2000 Compliant
    Real time clock accuracy < ±2 seconds / day
    External clock synchronisation Conforms to IRIG standard 200-98, format B
    Opto input time synchronisation Energisation of opto causes seconds on relay clock to
    snap or crawl to 00 seconds (rounding up or down to
    nearest minute)
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    
    6. POST FAULT ANALYSIS
    The following claims for Post Fault Analysis Functions are applicable to the P540 range of
    current differential relays (model specific as detailed).
    6.1 Fault Records
    6.1.1 Features
    Fault record generation on protection
    operation indicating
    Time and date
    Setting group
    Start / trip element
    Faulted current and voltage magnitudes
    Remote, bias and differential currents
    Frequency
    Fault Clearance time
    CB operating time
    Protection operating time
    Fault location
    Autoreclose shot number
    Alarm events generated on the following
    indications
    Protection disabled/test mode
    VTS
    CB alarms
    Autoreclose
    Frequency out of range
    Battery status
    Incompatible relays
    Differential protection inhibited
    Configuration / reconfiguration error
    Field voltage fail
    Loopback test
    Signal fail alarm
    Signal propagation delay alarm
    Differential fail alarm
    C Diff Comm Mode (Software 30 or later)
    IEEE C37.94 (Software 30 or later)
    Setting groups
    6.1.2 Performance
    Fault record display indication and information Correct
    Alarm events display indication and information Correct
    Time and date stamping ±10ms of applied fault/event
    Fault Clearance time ±2%
    CB operating time ±10ms
    Protection operating time ±2%
    6.2 Disturbance Records
    6.2.1 Level settings
    Settings Range Step size
    Duration 0.1 – 10.5s 10ms
    Trigger position 0 – 100% 0.1%
    8 analogue channels, 32 digital channels, single or extended trigger modes
    6.2.2 Accuracy
    Waveshape Comparable with applied quantities
    Magnitude and relative phases ±5% of applied quantities
    Duration ±2%
    Trigger position ±2% (minimum trigger 100ms)

     
    
     
     
    
    
    
     
    
    
    
    
    
    6.3 Fault Locator Settings {P543, P544, P545 and P546}
    6.3.1 Level settings
    Name Range Step size
    Line length 0.01 to 1000km ** 0.01km ** ** Or Equivalent
    Line impedance 0.1/Ιn to 250/Ιn Ω 0.01/Ιn Ω (in miles)
    Line angle 20° to 85° 1°
    Line residual 0 to 7 0.01
    Residual angle
    (Software 30 or later)
    -180° to 90° 1°
    Residual angle -90° to 90° 1°
    6.3.2 Accuracy
    Fault location ±2% of line length (Under reference conditions)*
    * Reference conditions solid fault applied on line.
    7. PLANT SUPERVISION
    The following claims for Plant Supervision Functions are applicable to the P540 range of
    current differential relays (model specific as detailed).
    7.1 CB State Monitoring Control and Condition Monitoring
    7.1.1 Level settings
    Setting Range Step
    Trip pulse time 0.01 – 5s 0.01s
    Close pulse time 0.01 – 10s 0.01s
    Broken current exponent 1 – 2 0.1
    Excessive fault frequency 0 – 9999 1
    7.1.2 Accuracy
    Timers ±2% or 20ms whichever is greater
    Broken current accuracy ±5%
    7.2 CB State Monitoring Control, breaker fail and backtrip, breaker fail timer
    7.2.1 Level settings
    Setting Range Step
    Breaker fail timer 1 0 – 10s 0.01s
    Breaker fail timer 2 0 – 10s 0.01s
    7.2.2 Accuracy
    Timers ±2% or 40ms whichever is greater
    Reset <30ms
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    8. LOCAL AND REMOTE COMMUNICATIONS
    The following claims for Local & Remote Communications are applicable to the P540 range
    of current differential relays (model specific as detailed).
    8.1 Front Port
    Front port Communication Parameters (Fixed)
    Protocol Courier
    Address 1
    Message format IEC 60870FT1.2
    Baud rate 19200 bits/s
    8.2 Rear Port 1
    Rear port settings Setting options Setting available for
    RP1 Address 0 – 254 (step 1)
    0 – 255 (step 1)
    1 – 247 (step 1)
    0 – 65519 (step 1)
    IEC*
    Courier
    Modbus
    DNP3.0
    RP1 Inactiv Timer 1 – 30 minutes (step 1) All
    RP1 Baud Rate 1200 bits/s
    2400 bits/s
    4800 bits/s
    9600 bits/s
    19200 bits/s
    38400 bits/s
    DNP3.0
    DNP3.0
    DNP3.0
    All (not KBus)
    All (not KBus)
    All except IEC* and KBus
    RP1 Parity “Odd”, “Even” or “None” Modbus/DNP3.0
    RP1 Meas Period 1 – 60 minutes (step 1) IEC* only
    RP1 Physical Link
    (Software 30 or later)
    EIA(RS)485 Courier, Modbus, IEC* and
    DNP3.0
    Fibre optic Courier (except when K-Bus
    selected or UCA2 option fitted)
    Modbus
    IEC*
    DNP3.0
    RP1 Physical Link EIA(RS)485
    Fibre optic
    IEC*
    IEC*
    RP1 Time Sync Enabled / Disabled DNP 3.0
    RP1 CS103 Blocking Disabled / Monitor Block /
    Command Block
    IEC* Only
    RP1 Port Config K-Bus / Courier (RS485) Courier Only
    RP1 Comms Mode IEC 60870 FT1.2 / 10 bit Courier Only
    * IEC = IEC60870-5-103
    8.2.1 Performance
    Front and rear ports conforming to Courier communication protocol Compliant
    Rear ports conforming to Modbus communication protocol Compliant
    Rear ports conforming to 870-5 103 communication protocol Compliant
    Rear ports conforming to DNP3.0 communication protocol Compliant

     
    
     
     
    
    
    
     
    
    
    
    
    
    8.3 Second Rear Communication Port
    Setting Setting Options Setting available for
    RP2 Port Config EIA232, EIA485 or kbus
    RP2 Comms Mode IEC60870 FT1.2, 11 bit frame
    or
    IEC60870, 10 bit frame
    EIA232 and EIA485
    RP2 Address 0 – 255 (step 1) All
    Rp2 InactivTimer 1 – 30 minutes (step 1) All
    RP2 Baud Rate 9600/19200/38400 bits/s EIA232 and EIA485
    Note: To avoid exceeding second rear communications port flash
    clearances the length of the cable, between the port and associated
    communications equipment should be limited to 300 metres. In
    situations where 300 metres may be insufficient it must be ensured
    that the communications cable is not laid in close proximity to high
    current carrying conductors. The communications cable should be
    screened with screen earthed at one end only.
    8.4 Ethernet Communications (P543, P544, P545 and P546)
    Name Range Step Size
    IP Address 000.000.000.000 – 255.255.255.255 1
    Subnet Mask 000.000.000.000 – 255.255.255.255 255
    Number of Routes 0 – 4 1
    Router Address 1 000.000.000.000 – 255.255.255.255 1
    Target Network 1 000.000.000.000 – 255.255.255.255 1
    Router Address 2 000.000.000.000 – 255.255.255.255 1
    Target Network 2 000.000.000.000 – 255.255.255.255 1
    Router Address 3 000.000.000.000 – 255.255.255.255 1
    Target Network 3 000.000.000.000 – 255.255.255.255 1
    Router Address 4 000.000.000.000 – 255.255.255.255 1
    Target Network 4 000.000.000.000 – 255.255.255.255 1
    NIC InactivTimer 1 – 30 1
    Default Pass Lvl 0 – 2 1
    GOOSE Min Cycle 1 – 50 1
    GOOSE Max Cycle 1 – 60 1
    GOOSE Increment 0 – 999 1
    GOOSE Startup Promiscuous / Broadcast -
    Ethernet Media Copper / Fibre -
    Link Timeout 0.1s – 60s 0.1s
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    9. DIAGNOSTICS
    The following claims for Diagnostic Functions are applicable to the P540 range of current
    differential relays (model specific as detailed).
    9.1 Features
    Power up self checking with watchdog indication of healthy condition
    Watchdog and front display indication of a hardware or software failure occurring during power up
    or during normal in service operation
    9.2 Performance
    Power up / continuous self checks Compliant
    Watchdog operation Compliant
    Co-processor failure detection Compliant
    Time to power up < 11s

     
    
     
     
    
    
    
      
    
    
    
    
    
    10. RATINGS
    The following claims for Ratings are applicable to the P540 range of current differential
    relays (model specific as detailed) and P594 GPS Receiver Module.
    10.1 Nominal ratings
    10.1.1 Currents (All P540 range)
    Ιn = 1A or 5A ac rms.
    Separate terminals are provided for the 1A and 5A windings, with the neutral input of each
    winding sharing one terminal.
    All current inputs will withstand the following, with any current function setting:
    Withstand Duration
    4Ιn Continuous rating
    4.5Ιn 10 minutes
    5Ιn 5 minutes
    6Ιn 3 minutes
    7Ιn 2 minutes
    30Ιn 10 seconds
    50Ιn 3 seconds
    100Ιn 1 second
    Pass Criteria Winding temperatures <105° C
    Dielectric withstand and insulation resistance unimpaired
    10.1.2 Voltage inputs (All P540 range)
    All voltage inputs will withstand the following, with any voltage function setting.
    Nominal Voltage (Vn) Operating range
    100-120Vph - ph rms. 0 to 200Vph - ph rms.
    Withstand
    (Vn = 100/120V)
    Duration
    240Vph - ph rms. Continuous rating (2Vn)
    312Vph - ph rms. 10 seconds (2.6Vn)
    Pass Criteria Winding temperatures <105° C
    Dielectric withstand and insulation resistance unimpaired
    10.1.3 Auxiliary voltages (All P540 range + P594 as indicated)
    10.1.3.1 P540 range
    Three auxiliary power supply versions are available:
    Nominal Ranges Operative dc range Operative ac range
    24-48 V dc 19 - 65 V Not available
    48-110 V dc (30/100 V ac rms.) ** 37 - 150 V 24 – 110 V
    110-250 V dc (100/240 V ac rms.) ** 87 - 300 V 80 – 265 V
    ** rated for AC or DC operation.
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    Pass Criteria All functions operate as specified within the operative ranges
    All power supplies operate continuously over their operative ranges, and
    environmental conditions
    10.1.3.2 P594
    Two auxiliary power supply versions are available:
    Nominal Ranges Operative dc range Operative ac range
    24/125 V dc (110 V ac rms.) ** 19 – 150 V 50 – 133 V
    48/250 V dc (110/230 V ac rms.) ** 33 – 300 V 87 – 265 V
    10.1.4 ‘Universal’ Logic inputs (P540 range)
    Standard 60% - 80% Nominal Battery 50% - 70% (Software 30 or later)
    Voltage (Vdc) No Operation
    (logic 0) Vdc
    Operation
    (logic 1) Vdc
    No Operation
    (logic 0) Vdc
    Operation
    (logic 1) Vdc
    24 / 27 <16.2 >19.2 <12.0 >16.8
    30 / 34 <20.4 >24.0 <15.0 >21.0
    48 / 54 <32.4 >38.4 <24.0 >33.6
    110 / 125 <75.0 >88.0 <55.0 >77.0
    220 / 250 <150.0 >176.0 <110 >154
    10.1.5 Output contacts (P540 range)
    Make & Carry 30A for 3s
    Carry 250A for 30ms
    10A continuous
    Break DC: 50W resistive
    DC: 62.5W inductive (L/R = 50ms)
    AC: 2500VA resistive
    AC: 2500VA inductive (P.F. = 0.7)
    Maxima: 10A and 300V
    Loaded contact: 10,000 operation minimum
    Unloaded contact: 100,000 operations minimum
    Watchdog Contact
    Break DC: 30W resistive
    DC: 15W inductive (L/R = 40ms)
    AC: 275VA inductive (P.F. = 0.7)
    10.1.6 Field voltage (P540 range)
    Rated field voltage output 48V dc
    Rated field voltage current limit 112mA ±20%
    Operating range 40V to 60V
    Alarm voltage 35 V ±5%
    10.2 Burdens
    10.2.1 Current (P540 range)
    Reference current (Ιn)
    Phase <0.15VA at rated current
    10.2.2 Voltage (P540 range)
    Reference voltage (Vn)

     
    
     
     
    
    
    
     
    
    
    
    
    
    Vn = 100/120V <0.02VA at 110V
    10.2.3 Auxiliary voltage
    10.2.3.1 P540 range
    Typical values
    Type Case size Minimum*
    P541 Size 8”/40TE 11W or 24VA
    P542, P543, P544 Size 12”/60TE 11W or 24VA
    P545, P546 Size 16”/80TE 11W or 24VA
    * no output contacts or optos energised
    For each energised Opto powered from the Field Voltage or each energised Output Relay:
    Each additional energised opto input 0.09W
    (24/27, 30/34, 48/54V)
    Each additional energised opto input 0.12W (110/125V)
    Each additional energised opto input 0.19W (220/250V)
    Each additional energised output relay 0.13W
    10.2.3.2 P594 GPS Module
    Type Case size Nominal
    P594 20TE 4W
    10.2.4 Logic inputs (P540 range)
    Typically 10mVA at 48v (field voltage)
    10.2.5 Optically isolated inputs
    Peak current of opto inputs when energised is 3.5mA (0-300V)
    Maximum input voltage 300V dc (any setting).
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    11. CT REQUIREMENTS (P540 RANGE)
    11.1 Current differential protection
    For accuracy, class X or class 5P current transformers (CTs) are strongly recommended.
    The knee point voltage of the CTs should comply with the minimum requirements of the
    formula shown below.
    Vk ≥ K . Ιn (Rct + 2 RL)
    Where:
    Vk = Required IEC knee point voltage
    K = Dimensioning factor
    Ιn = CT nominal secondary current
    Rct = CT resistance
    RL = One-way lead impedance from CT to relay
    K is a constant depending on:
    Ιf = Maximum value of through fault current for stability (multiple of In)
    X/R = Primary system X/R ratio
    K is determined as follows:
    For relays set at Ιs1 = 20%, Ιs2 = 2 Ιn, k1 = 30%, k2 = 150%:
    K ≥ 40 + (0.07 x (Ιf x X/R))
    And: K ≥ 65
    This is valid for (Ιf x X/R) ≤ 1000
    For higher (Ιf x X/R) up to 1600 :
    K = 107.
    For relays set at Ιs1 = 20%, Ιs2 = 2 Ιn, k1 = 30%, k2 = 100%:
    K ≥ 40 + (0.35 x (Ιf x X/R))
    And: K ≥ 65
    This is valid for (Ιf x X/R) ≤ 600
    For higher (Ιf x X/R) up to 1600 :
    K = 256.
    11.2 Earth fault protection
    Using core balance CT.
    Vk > 6 (N) (Ιn)(RCT + 2RL)
    where maximum X/R ratio =5 and the maximum earth fault current =2 x Ιn
    where
    Vk, Rct, RL = (See above)
    N = Max. earth fault current/core balance CT rated primary current
    Note: N should not be greater than 2. The core balance CT must be
    selected accordingly.

     
    
     
     
    
    
    
     
    
    
    
    
    
    12. HIGH VOLTAGE WITHSTAND (P540 RANGE & P594)
    12.1 Dielectric withstand, impulse, insulation resistance and ANSI test requirements
    insulation test voltage
    12.1.1 Impulse
    IEC 60255-5:2000
    5kV 1.2/50μs impulse, common and differential mode - input, power supply, & terminal block
    communications connections.
    12.1.2 Dielectric withstand
    IEC 60255-5:2000
    2kV rms. for 1 minute between all terminals connected together and case earth.
    2kV rms. for 1 minute between all terminals of independent circuits with terminals on each
    independent circuit connected together.
    1kV rms. for 1 minute across watchdog contacts.
    12.1.3 ANSI dielectric withstand
    ANSI/IEEE C37.90. (1989) (Reaff. 1994)
    1kV rms. for 1 minute across open contacts of the watchdog contacts.
    1kV rms. for 1 minute across open contacts of changeover output contacts.
    1.5kV rms. for 1 minute across normally open output contacts.
    12.1.4 Insulation resistance
    IEC 60255-5:2000
    100 MΩ minimum.
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    
    13. ELECTRICAL ENVIRONMENT
    13.1 Performance criteria
    The following three classes of performance criteria are used within sections 13.2 to 13.12
    (where applicable) to specify the performance of the MiCOM relay when subjected to the
    electrical interference. The performance criteria are based on the performance criteria
    specified in EN50263: 2000.
    13.1.1 Class A
    During the testing the relay shall not maloperate, upon completion of the testing the relay
    shall function as specified. A maloperation shall include a transient operation of the output
    contacts, operation of the watchdog contacts, reset of any of the relays microprocessors, an
    alarm indication, degradation of measurements or human-machine interface.
    Communications must continue uncorrupted via the communications ports during the tests,
    however communications may continue with a higher bit error rate during the tests, provided
    that it recovers with no external intervention and does not allow data to be lost.
    If the above performance criteria are satisfied, MiCOM Px40 Platform has passed the test for
    this performance criteria level.
    13.1.2 Class B
    During the testing the relay shall not maloperate, upon completion of the testing the relay
    shall function as specified. A maloperation shall include a transient operation of the output
    contacts, operation of the watchdog contacts, reset of any of the relays microprocessors, an
    alarm indication. Temporary degradation of measurements or human-machine interface is
    acceptable provided it self recovers and there is no loss of stored data.
    Communications must continue uncorrupted via the communications ports during the tests,
    however communications may continue with a higher bit error rate during the tests, provided
    that it recovers with no external intervention and does not allow data to be lost.
    If the above performance criteria are satisfied, MiCOM Px40 Platform has passed the test for
    this performance criteria level.
    13.1.3 Class C
    The MiCOM Px40 Platform relay shall power down and power up again in a controlled
    manner. The output relays are permitted to change state during the test as long as they
    reset once the relay powers up.
    Communications to MiCOM Px40 Platform may be suspended during the testing as long as
    communications recovers with no external intervention after testing.
    13.2 Auxilary supply tests, dc interruption, etc.
    13.2.1 DC voltage interruptions
    13.2.1.1 P540 RANGE
    IEC 60255-11:1979.
    DC Auxiliary Supply Interruptions 2, 5, 10, 20ms. Performance criteria - Class A.
    DC Auxiliary Supply Interruptions 50, 100, 200ms, 40s. Performance criteria - Class C.
    P594 GPS Receiver Module
    IEC 60255-11:1979.
    DC Auxiliary Supply Interruptions 2, 5, 10, 20ms. Performance criteria - Class A.
    DC Auxiliary Supply Interruptions 50, 100, 200ms, 40s. Performance criteria - Class C.

     
    
     
     
    
    
    
     
    
    
    
    
    
    13.2.2 DC voltage fluctuations
    13.2.2.1 P540 range
    IEC 60255-11:1979.
    AC 100Hz ripple superimposed on DC max. and min. auxiliary supply at 12% of highest
    rated DC.
    Performance criteria - Class A.
    13.2.2.2 P594 GPS Receiver Module
    IEC 60255-11:1979.
    AC 100Hz ripple superimposed on DC max. and min. auxiliary supply at 12% of highest
    rated DC.
    Performance criteria - Class A.
    13.3 AC voltage dips and short interruptions
    13.3.1 AC Voltage short interruptions
    13.3.1.1 P540 range
    IEC 61000-4-11:1994.
    AC Auxiliary Supply Interruptions 2, 5, 10, 20ms. Performance criteria - Class A.
    AC Auxiliary Supply Interruptions 50, 100, 200ms, 1s, 40s. Performance criteria - Class C.
    13.3.2 AC voltage dips
    13.3.2.1 P540 range
    IEC 61000-4-11:1994
    AC Auxiliary Supply 100% Voltage Dips 2, 5, 10, 20ms. Performance criteria - Class A.
    AC Auxiliary Supply 100% Voltage Dips 50, 100, 200ms, 1s, 40s. Performance criteria -
    Class C.
    AC Auxiliary Supply 60% Voltage Dips 2, 5, 10, 20ms. Performance criteria - Class A.
    AC Auxiliary Supply 60% Voltage Dips 50, 100, 200ms, 1s, 40s. Performance criteria - Class
    C.
    AC Auxiliary Supply 30% Voltage Dips 2, 5, 10, 20ms. Performance criteria - Class A.
    AC Auxiliary Supply 30% Voltage Dips 50, 100, 200ms, 1s, 40s. Performance criteria - Class
    C.
    13.4 High Frequency Disturbance IEC 60255-22-1:1988 Class III. (P540 range & P594 GPS
    Receiver)
    1MHz burst disturbance test.
    2.5kV common mode.
    Power supply, field voltage, CTs, VTs, opto inputs, output contacts, IRIG-B and terminal
    block communications connections.
    1kV differential mode.
    Power supply, field voltage, CTs, VTs, opto inputs and output contacts.
    Performance criteria Class A.
    Fast Transients (P540 range & P594 GPS Receiver)
    EN 61000-4-4:1995 (IEC 60255-22-4:2002 ), Level 3 and Level 4.
    2kV 5kHz (Level 3) and 4kV 2.5kHz (Level 4) direct coupling.
    Power supply, field voltage, opto inputs, output contacts, CTs, VTs.
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    2kV 5kHz (Level 3) and 4kV 2.5kHz (Level 4) capacitive clamp.
    IRIG-B and terminal block communications connections.
    Performance criteria Class A.
    13.5 Conducted / Radiated emissions (P540 range & P594 GPS Receiver)
    13.5.1 Conducted emissions
    EN55022:1998 (EN60255-25:2000).
    0.15 - 0.5MHz, 79dBμV (quasi peak) 66dBμV (average).
    0.5 - 30MHz, 73dBμV (quasi peak) 60dBμV (average).
    Radiated emissions
    EN55022:1998 (EN60255-25:2000).
    30 - 230MHz, 40dBμV/m at 10m measurement distance.
    230 - 1000MHz, 47dBμV/m at 10m measurement distance.
    13.6 Conducted / Radiated Immunity (P540 range & P594 GPS Receiver)
    13.6.1 Conducted immunity
    EN 61000-4-6:1996 Level 3 (EN60255-22-6:2001).
    10V emf @ 1kHz 80% am, 150kHz to 80MHz.
    Spot tests at 27MHz, 68MHz.
    Performance criteria Class A.
    13.6.2 Radiated immunity
    EN 61000-4-3: 2002 Level 3 (IEC 60255-22-3:2000 Class III)
    10 V/m 80MHz - 1GHz @ 1kHz 80% am.
    Spot tests at 80MHz, 160MHz, 450MHz, 900MHz and 900MHz (200Hz rep. freq., 50% duty
    cycle pulse modulated).
    Performance criteria Class A.
    13.6.3 Radiated immunity from digital radio telephones
    EN 61000-4-3: 2002 Level 4
    30 V/m 800MHz – 960MHz and 1.4GHz – 2GHz @ 1kHz 80% am.
    Performance criteria Class A.
    13.7 Electrostatic Discharge (P540 range & P594 GPS Receiver)
    EN61000-4-2:1995 Level 3 and Level 4 (EN60255-22-2:1996).
    Level 4: 15kV air discharge.
    Level 4: 8kV contact discharge.
    Tests carried out both with and without cover fitted.
    Performance criteria Class A.

     
    
     
     
    
    
    
     
    
    
    
    
    
    13.8 Surge Immunity (P540 range & P594 GPS Receiver)
    EN61000-4-5:1995 Level 4 (EN60255-22-5:2002).
    4kV common mode 12Ω source impedance, 2kV differential mode 2Ω source impedance,
    level 4.
    Power supply.
    4kV common mode 42Ω source impedance, 2kV differential mode 42Ω source impedance,
    Level 4.
    Opto inputs, relays, field voltage, CT, VT.
    4kV common mode 2Ω source impedance applied to cable screen.
    Terminal block communications connections and IRIG-B.
    2kV common mode 42Ω source impedance applied each line to earth.
    RJ45 ethernet communications.
    Performance criteria Class A.
    13.9 Power Frequency Interference (P540 range & P594 GPS Receiver)
    NGTS* 2.13 Issue 3 April 1998, section 5.5.6.9.
    500V rms. common mode.
    250V rms. differential mode.
    Voltage applied to all non-mains frequency inputs. Interference applied to all permanently
    connected communications circuits via the induced voltage method.
    Performance criteria Class A.
    * National Grid Technical Specification
    13.10 Surge Withstand Capability (SWC) - (P540 range & P594 GPS Receiver)
    ANSI/IEEE C37.90.1 2002
    Oscillatory SWC Test.
    2.5kV, 1MHz - common and differential mode – applied to all circuits except for IRIG-B and
    terminal block communications, which are tested using a capacitor clamp.
    Fast Transient SWC Tests
    4kV crest voltage - common and differential mode - applied to all circuits except for IRIG-B
    and terminal block communications, which are tested using a capacitor clamp.
    Performance criteria Class A.
    13.11 Radiated Immunity (P540 range & P594 GPS Receiver)
    ANSI/IEEE C37.90.2 1995
    35 V/m 25MHz - 1GHz, no modulation applied to all sides.
    35 V/m 25MHz - 1GHz, 100% pulse modulated, front only.
    Performance criteria Class A.
    13.12 Power Frequency Magnetic Field IMMUNITY (P540 range & P594 GPS Receiver)
    EN61000-4-8:1993 Level 5.
    100A/m field applied continuously in all planes for the EUT in a quiescent and tripping state
    1000A/m field applied for 3s in all planes for the EUT in a quiescent and tripping state
    Performance criteria Class A.
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    13.13 Pulse Magnetic Field IMMUNITY (P540 range & P594 GPS Receiver)
    EN 61000-4-9:1993 Level 5.
    1000A/m field applied in all planes for the EUT in a quiescent state
    Performance criteria Class A.
    13.14 Damped oscillatory Magnetic Field IMMUNITY (P540 range & P594 GPS Receiver)
    EN61000-4-10:1993 Level 5.
    100A/m field applied in all planes at 100kHz / 1MHz with a burst duration of 2 seconds
    Performance criteria Class A.
    13.15 Oscillatory waves immunity test (P540 range)
    EN61000-4-12:1995 Level 3.
    2.5kV peak between indpendent circuits and case earth.
    1.0kV peak across terminals of the same circuit.
    Performance criteria Class A.

     
    
     
     
    
    
    
      
    
    
    
    
    
    14. ATMOSPHERIC ENVIRONMENT
    14.1 Temperature (P540 range & P594 GPS Receiver)
    IEC 60068-2-1:1990/A2:1994 - Cold
    IEC 60068-2-2:1974/A2:1994 - Dry heat
    IEC 60255-6:1988.
    Operating temperature range °C Storage temperature range °C
    Cold
    Temperature
    Dry heat
    Temperature
    Cold
    Temperature
    Dry heat
    Temperature
    -25 55 -25 70
    14.2 Humidity (P540 range & P594 GPS Receiver)
    IEC 60068-2-3:1969
    Damp heat, steady state, 40° C ± 2° C and 93% relative humidity (RH) +2% -3%, duration 56
    days.
    IEC 60068-2-30:1980.
    Damp heat cyclic, six (12 + 12 hour cycles) of 55°C ±2°C 93% ±3% RH and 25°C ±3°C 93%
    ±3% RH.
    14.3 Enclosure protection (P540 range & P594 GPS Receiver)
    IEC 60529:1989.
    IP52 front face
    IP30 sides of case
    IP10 rear of case
    IP5x – Protected against dust, limited ingress permitted.
    IP3x – Protected against solid foreign ******s of 25mm diameter and greater.
    IP1x – Protected against solid foreign ******s of 50mm diameter and greater.
    IPx2 – Protected against vertically falling drops of water with the product in 4 fixed positions
    of 15° tilt with a flow rate of 3mm/minute for 2.5 minutes.
    Ipx0 – No protection against water ingress.
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    15. MECHANICAL ENVIRONMENT (P540 RANGE & P594 GPS RECEIVER)
    15.1 Performance criteria
    The following severity classes are used, where applicable, to specify the performance to
    specify the performance of the MiCOM relay, when subjected to mechanical testing.
    15.1.1 Severity Classes
    The following table details the Class and Typical Applications of the vibration, shock bump
    and seismic tests detailed previously
    Class Typical Application
    1 Measuring relays and protection equipment for normal use in power plants,
    substations and industrial plants and for normal transportation conditions
    2 Measuring relays and protection equipment for which a very high security margin is
    required or where the vibration (shock and bump) (seismic shock) levels are very
    high, e.g. shipboard application and for severe transportation conditions.
    15.1.2 Vibration (sinusoidal)
    IEC 60255-21-1:1988
    Cross over frequency - 58 to 60 Hz
    Vibration Response
    Severity Class Peak
    displacement
    below cross over
    frequency
    (mm)
    Peak acceleration
    above cross over
    frequency
    (gn)
    Number of
    sweeps in each
    axis
    Frequency
    range (Hz)
    2 0.075 1 1 10 – 150
    Vibration Endurance
    Severity Class Peak acceleration
    (gn)
    Number of
    sweeps in each
    axis
    Frequency range
    (Hz)
    2 2.0 20 10 – 150
    15.1.3 Shock and bump
    IEC 60255-21-2:1988
    Type of test Severity Class Peak acceleration
    (gn)
    Duration of
    pulse
    (ms)
    Number of Pulses
    in each direction
    Shock response 2 10 11 3
    Shock withstand 1 15 11 3
    Bump 1 10 16 1000

     
    
     
     
    
    
    
     
    
    
    
    
    
    15.1.4 Seismic
    IEC 60255-21-3:1993
    Cross over frequency - 8 to 9Hz
    x = horizontal axis, y = vertical axis
    Severity Class Peak displacement
    below cross over
    frequency (mm)
    Peak acceleration
    above cross over
    frequency (gn)
    Number of
    sweep cycles in
    each axis
    Frequency
    range (Hz)
    x y x y
    2 7.5 3.5 2.0 1.0 1 1- 35
    16. INFLUENCING QUANTITIES
    16.1 Harmonics (P540 range)
    Tolerances quoted are an additional tolerance with respect to measured accuracy without
    harmonics.
    Harmonics applied 2nd – 17th 10% harmonics
    Measurements / filtered relay inputs Unaffected by harmonics
    Fault locator ±2% of line length
    16.2 Frequency (P540 Range)
    Operating frequency 45Hz – 65Hz Affect
    Overcurrent protection Unaffected by frequency
    Earth fault protection Unaffected by frequency
    Sensitive earth fault protection Unaffected by frequency
    Disturbance recorder Unaffected by frequency
    Check sync slip frequency Unaffected by frequency
    Differential protection single end fed ± (f-fn)/fn %
    double end fed ± 2*(f-fn)/fn %
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    17. APPLICATION SPECIFIC
    17.1 Magnetising Inrush Current {P541 and P542}
    17.1.1 Level settings
    Setting Range Step
    Ιd High set 4 – 32A 0.01A
    17.1.2 Accuracy
    Minimum Ιd setting for stability (60MVA) >40% of max. peak inrush current
    Operating times <40ms
    17.2 Stability tests during current reversal conditions (P540 range)
    17.2.1 Features
    Relay to remain stable for current reversals within the protected feeder
    17.3 Performance
    Stability during current reversals Compliant
    17.4 Capacitive charging current compensation {P543, P544, P545 and P546}
    17.4.1 Level settings
    Setting Range Step
    Susceptance 0.01μS – 10S 0.01μS
    17.4.2 Performance
    Capacitive current compensation disabled Ιs1 to be set at least 2.5 times the steady state
    charging current for stability
    Capacitive current compensation enabled Ιs1 settable below the steady state charging current
    without maloperating
    17.5 Transient bias characteristic for switched communication channels (P540 range –
    GPS Disable for P545/P546)
    17.5.1 Level settings
    Setting Range Step
    Comm delay tol. 250 - 1000μs 50μs
    Char mod time 0 – 2s 100μs
    17.5.2 Performance
    Propagation delay exceeding setting Bias characteristic modified for set time delay
    Timers ±2% or 20ms whichever is greater

     
    
     
     
    
    
    
     
    
    
    
    
    
    18. MISCELLANEOUS
    18.1 Analogue inputs, Logic inputs, Outputs relays (P540 range)
    Relay 1A/5A dual
    rated CTs
    100 / 120V
    VTs
    Logic inputs Output relays Output LEDs Test port
    P541 4 0 8 7 8 TTL logic
    output
    P542 4 0 16 14 8 TTL logic
    output
    P543 5 4 16 14 8 TTL logic
    output
    P544 9 3 16 14 8 TTL logic
    output
    P545 5 4 24 32 8 TTL logic
    output
    P546 9 3 24 32 8 TTL logic
    output
    status
    displayed on
    LCD
    status
    displayed on
    LCD
    test pattern
    available on
    front user
    interface
    DDB*
    signals
    mapped to
    front port for
    test
    purposes
    *Digital Data Bus
    18.2 Front user interface (P540 range)
    All relay settings configurable from front user interface with the exception of
    programmable scheme logic, GOOSE logic and DNP.
    Compliant
    Back light inactivity timer 15 min. ±1min.
    Two levels of password protection. Protection critical cells have high level
    password protection with other cells requiring a lower or no password
    Compliant
    Password protection removable Compliant
    18.3 Battery life (P540 range)
    Battery life (assuming relay energised for 90% of time) > 10 years
    1/2 AA size 3.6 V lithium thionyl chloride battery (SAFT advanced battery
    reference LS14250)
    Low battery voltage, failure or absence of battery will be indicated Compliant
    The relay is protected against incorrect insertion of battery Compliant
    Removal of the battery with the relay energised will no affect records, events or
    real time clock
    Compliant
    18.4 Frequency tracking (P540 range)
    Relay will frequency track over its entire operating range 45 – 65Hz
    The relay will frequency track off any voltage or current inputs Compliant
    The relay will frequency track down to the following Voltage
    Levels: Current
    Effect of harmonic None, relay
    tracks off
    fundamental
    frequency
    
     
     
    
    
    MiCOM P541, P542,
    P543, P544, P545, P546  
    
    18.5 K-Bus compatibility (P540 range)
    Relay K-Bus interface compatible with other relays of different product families
    using K-Bus.
    Compliant
    Relay K-Bus port operates over 1km range with loading at either end of
    transmission line.
    Compliant
    19. EC EMC COMPLIANCE (P540 RANGE, P594 GPS RECEIVER)
    Compliance to the European Community Directive 89/336/EEC amended by 93/68/EEC is
    claimed via the Technical Construction File route.
    The Competent Body has issued a Technical Certificate and a Declaration of Conformity has
    been completed.
    The following standard shall be used for reference and to establish conformity:
    EN 50263:2000 Electromagnetic compatibilty (EMC) Product Standard for measuring
    relays and protection equipment.
    20. EC LVD COMPLIANCE (P540 RANGE, P594 GPS RECEIVER)
    Compliance with European Community Directive on Low Voltage 73/23/EEC is
    demonstrated by reference to generic safety standards:
    EN 61010-1:2001
    EN 60950-1:2001

     
    
     
     
    
    
    
     
    
    
    
    
    

  4. #4
    Junior Engineer الصورة الرمزية sashoo
    تاريخ التسجيل
    Apr 2006
    الدولة
    ليبيا
    المشاركات
    25

    رد: عاجل وهام

    شكراً لك اخي الكريم

  5. #5
    Junior Engineer الصورة الرمزية issa alajarmeh
    تاريخ التسجيل
    Oct 2006
    الدولة
    jordan
    المشاركات
    170

    رد: عاجل وهام

    thanks alot

  6. #6

    رد: عاجل وهام

    جزاك الله خيرا

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