1/8/2018 GEC RELAYS
Midos Modular Integrated Drawout System of
Protective Relays
LFCB Digital Current Differential Relay
Functions to be tested:
Phase segregated differential current protection with high sensitivity
Event recording
Fault recording
OPTIMHO Static Distance Protection Relays
Functions to be tested:
Phase distance
Ground distance
Directional Earth Fault
Fault location w / wo. mutual compensation
VT supervision
3 phase fuse blow supervision
Power swing blocking
Loss of load trip feature
Fault recording
OPTIMHO Static Distance Single Phase Protection For Railway Systems
Functions to be tested:
Phase distance
Ground distance
VT supervision
Fuse blow supervision
Fault locator
Fault recording
Instantaneous overcurrent protection
Backup overcurrent protection
LFAA 101, 102 Auto-Reclose Relay
LFDC Digital Directional Comparison Protection Relay
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1/8/2018 GEC RELAYS
Functions to be tested:
High speed directional comparison protection using a signaling channel
Distance zone (back-up)
Switch on to fault protection
Directional earth fault protection
Voltage transformer supervision
Power swing blocking
Fault locator
LGPG111 Digital Integrated Generator Protection Relay
Functions to be tested:
Generator differential
Stator earth fault
Neutral displacement
Sensitive directional earth fault
Voltage dependent overcurrent
Reverse power and low forward power
Negative phase sequence
Field failure (loss of excitation)
Under and overvoltage
Under and overfrequency
Voltage balance
Fault recording
Event recording
Disturbance recording
LFZR High-Speed Numerical Distance Relays
Functions to be tested:
Phase selection
Distance protection
Communication schemes logic
Switch on to fault
Power swing blocking
Voltage transformer supervision
Stub protection
Overcurrent protection
Directional earth fault protection
Breaker failure protection
Fault locator
Fault recording
Event recording
Disturbance recording
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1/8/2018 GEC RELAYS
MICROMHO Static Distance Protection Relays
Functions to be tested:
Distance protection
Communication schemes logic
Switch on to fault
Power swing blocking
Mutual zero sequence compensation
Voltage transformer supervision
Directional earth fault protection
QUADRAMHO Static Distance Protection Relay
Functions to be tested:
Phase selection
Distance protection
Communication schemes logic
Phase current level detectors
Switch on to fault
Power swing blocking
Voltage transformer supervision
Directional earth fault protection
METI Directional Relay
METI 11 Voltage polarized single pole relay
METI 12 Dual polarized single pole relay
METI 13 Voltage polarized single pole relay with changeover
output contacts
METI 31 Voltage polarized three pole relay
MFAC High Impedance Differential Relay
MCAG 14, 34 High Stability Circulating Current Relay
MBCI Pilot wire Differential Feeder and Transformer Feeder
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1/8/2018 GEC RELAYS
Functions to be tested:
Line differential protection
Pilot supervision
Overcurrent check/starting
Intertripping
Transformer inrush current detector
MVTR 01, 02 Auto Reclose Relays
MCSU Sensitive Earth Fault Relay
MVGC01 Static Voltage Regulating Control Relay
Functions to be tested:
Integrated line drop compensation
Integrating timer (DT or IDMT char.)
Reverse reactance or circulating current compensation
Undervoltage detection
Overvoltage detection
Overcurrent detection
Intertap delay
80% undervoltage inhibit
Load shedding
MVTP Busbar Supervision Relay
MCAG 11,12,13,31,32,33 Instantaneous Overcurrent Relays
MRTP Supervision for AC Pilot Circuits
MCRI Instantaneous Overcurrent Relay
MVTI 11, 12 Instantaneous Voltage Relays
MCAG 19, 39 Instantaneous Overcurrent and Earth Fault Relays
MCTI 19, 39, 40 Instantaneous Overcurrent Relays
MVTU 11,12,13,18 Definite Time Delayed Voltage Relays
MHOR 04 High Speed Pilot –Wire Feeder Protection
MAVS 01,02,03 Check Synchronizing Relay
MVCU Compensated Overvoltage Relay
MCVI 01 Capacitor Bank Protection Relay
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1/8/2018 GEC RELAYS
MVAG Instantaneous Under and Overvoltage Relays
MVTD 11, 12, 13 Inverse Time Delayed Voltage Relays
MVAP 22 Voltage Selection Relay
MCHG 01 Motor Protection Relay for 3 phase Induction Motors
MCGG 22,42,52,53,62,63,82 Overcurrent Relay for Phase and Earth Faults
MVTR 51 Multi-Shot Auto-Reclose Relay
MBCZ 10 Low Impedance Biased Differential Busbar Protection
MFVU 21 Digital Definite Time Frequency Relay
MCTH Transformer Inrush Current Detector
MBCH 12, 13, 16 Biased Differential Protection for Transformers, Generators
and Generator Transformers
MVTR 52 Multi-Shot Auto-Reclose Relay
MCVG 61 Voltage Dependent Overcurrent Relay
MVAG 21 Voltage Monitoring Relay
METI 14 Instantaneous Directional Relay
MFOS 24 Out of Step Protection Relay
MYTU 04 Field Failure Relay
MCND 04 Negative Sequence Overcurrent Relay
MCHD 04 Thermal Replica Relay
MFVU 14 Digital, Definite Time Frequency Relay
MRSU 04 Rotor Earth Fault Protection Relay
MZTU 34 Under Impedance Relay
MOPN 01, 02 Motor Protection Relays
MWTU 14 Directional Power Relay
MCTI 14, 15, 34, 35, 44 Instantaneous Overcurrent and Undercurrent Relays
for Phase and Earth Fault Applications
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1/8/2018 GEC RELAYS
MVAG and MVUA Track Protection for DC Rapid Transit Systems Using
Undervoltage Relays
Older relays
KVTR Auto-Reclose Relays
KAVS Check Synchronising Relays
KAVR 100, 130 Multi-Shot Auto-Reclose and Check Synchronising Relay
KBCH 120, 130, 140 Differential Protection for Transformers and Generators
KAVR 159 General Purpose DAR Relay
KCEU 141, 241 Directional Phase Overcurrent and Directional Sensitive Earth
Fault Protection Relays
KCGG 122, 142 and KCEG 112, 142, 152, 242 Overcurrent and Directional
Overcurrent Protection
Functions to be tested:
Overcurrent
Earth fault
Directional overcurrent
Directional earth fault
Underfrequency
Undervoltage
Thermal overload
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