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Protection Relay for Feeder, Grid and Generator Applications
Protection Technology made simple
ApplicationThe MRA4 is a protection relay which uses the latest Dual-Core-Processor Technology to provide precise and re-liable protective functions and is very easy to operate. Its various protective functions are specifically tailored to the protection of incoming and out-going feeders in MV systems. It also can be used for grid and generator protection. All inclusive:
All protection features without • extra charge
Parameter setting and • evaluation software
Disturbance record analysis • software
Six stages phase overcurrent protection
Directional and non-directional • overcurrent/short-circuit protection
Tripping characteristics: • DEFT ANSI: NINV, VINV, EINV IEC: NINV, VINV, LINV, EINV Thermal Flat, IT, I2T, I4T
Voltage controlled•
Disturbance recorder120 s non volatile, •
32 samples per cycles
Additional highlightsAutomatic reclosing•Inrush•Thermal replica•Four stages external protection•Plausibility checks•Adaptive parameter sets•Energy counters•Status display•Comprehensive measured values •
and statisticsMasking of unused functions•
Parameter setting support by software
Copy parameter sets•Compare parameter sets•Setting files are up and down •
convertible (across versions)
Comprehensive frequency protection packageEach of the six stages can be used as:
f< or f> (over- and • underfrequency supervision)
df/dt (ROCOF) • Rate of change of frequency
(f< and df/dt) or (f> and df/dt) • combination of over-, under- and rate of change of frequency (ROCOF)
(f< and DF/DT) or (f> and DF/DT) • combination of over-, under- and increase of frequency
Delta Phi (Vector surge)•
Power protection packageSix stages power protection •
Each can be used as P>, P<, Pr, Q>, Q<, Qr, S>, S<
Two stages power factor (PF)•
SupervisionCurrent transformer supervision•Voltage transformer supervision•Circuit breaker failure protection•Trip circuit supervision•Cold load pickup•Switch onto fault•
HighPROTEC
MRA4
Four stages earth fault protectionDirectional and non-directional •
earth fault protectionTripping characteristic: •
DEFT ANSI: NINV, VINV, EINV IEC: NINV, VINV, LINV, EINV Thermal Flat, IT, I2T, I4T
Voltage controlled•
Two stages unbalanced load protection
Supervision by definite time or • tripping characteristic
Four stages voltage protectionUnder- and overvoltage•Programmable undervoltage •
time depending characteristic
Two stages residual voltage protection
VE>•
Six stages voltage asymmetry supervision
Under- and overvoltage in • positive phase sequence system, overvoltage in negative phase sequence system
Functional Overview
PrOTeCTive FunCTiOnS elements AnSi
I, time overcurrent and short circuit protection, all stages can be configured for directional or non-direc-tional supervision. Tremendous reset options (instantaneous, definite time, reset characteristics accor-ding to IEC and ANSI). Voltage controlled overcurrent protection by means of adaptive parameters.
6 6
50P, 51P, 67P
51V
I2>, unbalanced load protection with evaluation of the negative phase sequence currents 2 46
IB, overload protection with thermal replica and separate pick-up values for alarm and trip functions 1 49
IH2/In, inrush detection with evaluation of the 2nd harmonic 1 Inrush
IE, earth overcurrent and short circuit protection, all stages can be configured for directional or non-directional supervision. Tremendous reset options (instantaneous, definite time, reset characteristics according to IEC and ANSI). Voltage controlled overcurrent protection by means of adaptive parameters.
4 4
50N,51N, 67N
51V
V<, V>, V(t)<, under- and overvoltage protection, time dependent undervoltage protection 4 27, 59
Voltage asymmetry supervision (V012)V1, under and overvoltage in positive phase sequence systemV2, overvoltage in negative phase sequence system
6 47
Each of the six frequency protection stages can be used as: 6
f< or f> (over- and under frequency supervision)• 81U/O
df/dt rate of change of frequency (ROCOF)• 81R
(f< and df/dt) or (f> and df/dt) combination of over-, under- and rate of change of frequency (ROCOF) •
(f< and DF/DT) or (f> and DF/DT) • combination of over-, under- and increase of frequency
Delta Phi (Vector surge)• 78
VE, residual voltage protection 2 59N
AR, automatic reclosing 1 79
ExP, External alarm and trip functions 4
PQS, Power protection 6 32, 37
PF, Power factor 2 55
SuPerviSiOn FunCTiOnS elements AnSi
CBF, circuit breaker failure protection 1 50BF
TCS, trip circuit supervision 1 74TC
VTS, voltage transformer supervision by comparing phase and residual voltages 1 60FL
VTS, fuse failure protection via digital input 1 60FL
CTS, current transformer supervision 1 60L
CLPU, cold load pickup 1
SOTF, switch onto fault 1
Non volatile event recorder up to 120 s with 32 samples per cycles
3
1
4
MRA4
50BF
60FL27
Fault recorder
Event recorder
Disturbance recorder
V, VE, V012, I, IG, f, delta phi, theta , IH2,
IGH2, I012, P, Q, S, PF, cos phi, W
Measured and calculated values49 51P 67P50P46
81 U/O
67N79 Inrush
59 59N 50N 51N
74TC
7881R
37
32 60L 55
SOTF CLPU
47
51V
Functional overview in AnSi form
Connections
Current inputs 4 (1 A and 5 A) with automatic short circuitersvoltage inputs 4 (0 - 800 V)Digital inputs Switching thresholds adjustable via softwarePower supply Wide range power supplyTerminals All terminals plug typeMounting Door mountingType of enclosure IP54Dimensions of housing 212.7 mm x 173 mm x 209 mm (W x H x D)Weight (max. components) approx. 4 kg
Woodward SEG GmbH & Co. KGKrefelder Weg 47
D - 47906 Kempen
Sales TeamPhone: +49 (0) 21 52 1 45 - 1
Fax.: +49 (0) 21 52 1 45 - 3 54e-mail: [email protected]
ServiceTelefon: +49 (0) 21 52 1 45 - 6 14/3 34
Fax.: +49 (0) 21 52 1 45 - 4 55e-mail: [email protected]
Visit us at www.eps.woodward.com DO
K_FL
Y_M
RA4_
04.0
9_EN
Enabling Electrical Power Systems Integration
Order form MrA4
Directional Feeder Protection MrA4
Digital Inputs
Binary out-put relay Housing Large
display
816
713
B2B2
--
AD
Hardware variant 2Standard
0
Housing and mountingDoor mountingDoor mounting 19“ (flush mounting)
A B
Communication protocolProtocol/without protocol RS485/terminals, Modbus RTU, IEC60870-5-103 Ethernet (RJ45), Modbus TCP, IEC61850* prepared (Hardware/Interface) Optic fiber, Modbus RTU, IEC60870-5-103 RS485/D-SUB, Profibus**, Modbus RTU, IEC60870-5-103
A B C F G
Presetting of available menu languagesStandard English/German
* Additional cost for the software update tool IEC61850 per device are 250 €. The devices can be updated via device front interface (RS232) and PC locallyExpected availability: 01.01.2010**expected 07.09