Edison MG30 Generator Protection Relay

The MG30 is ideally suited for small to medium generators, or, when matched with the MD32G Generator Differential relay, as a complete protection package for larger generators. The MG30 provides a full compliment of protective functions required for generator protection. These include: under-impedance (21), overexcitation (24), under- voltage (27), reverse power (32), under power (37), loss-of-field (40), negative sequence overcurrent (46), thermal image trip (49), instantaneous overcurrent (50), breaker failure (50BF), time-overcurrent (51), voltage-dependent time-overcurrent (51V), inadvertent energization (50/27), positive sequence overvoltage (59pos), PT fuse failure (60FL), both 95% and 100% stator ground fault (64S), and two levels of frequency elements (81).

• Relays Catalog Section 150-52  

Edison UM30SV Vector Jump relay

The UM30SV Vector Jump relay is designed to detect generator islanding conditions. When a generator and its local load becomes isolated from the balance of the power system, a step change in sensed frequency occurs. This so called "vector jump" is a reliable indicator of an islanding condition.

In addition to detecting this phenomena, the other fucntions in the UM30SV make it an excellent all purpose voltage and frequency relay. Included are frequency (81), under and over-votlage (27, 59), sequence voltage elements (27pos, 59pos, 59neg, 59zero), and overexcitation (24).

• Relays Catalog Section 150-23  

Edison IM30G Generator Relay

The IM30G is ideally suited for the protection of small generators, or as the core protection package for either medium or large generators. The IM30G provides all the basic protective functions required for generator protection. These include: reverse power (32), loss-of-field (40), negative sequence overcurrent (46), instantaneous overcurrent (50), breaker failure (50BF), time-overcurrent (51), and stator ground fault protection (64).

• Relays Catalog Section 150-50  
• Instruction Manual  

The IM3GV is also well suited for the protection of small to medium generators, or as the core protection package for large generators. The IM3GV provides a full compliment of protective functions required for generator protection. These include: under voltage (27), reverse power (32), under power (37), loss-of-field (40), negative sequence overcurrent (46), thermal image trip (49), instantaneous overcurrent (50), breaker failure (50BF), time-overcurrent (51), voltage-dependent time-overcurrent (51V), positive sequence overvoltage (59pos), and two levels of frequency elements (81).

• Catalog Section 150-51  
• Instruction Manual S150-51-1  

The MD32G provides differential protection for rotating machine including both generators and motors. The MD32G provides protection against two or three-phase internal faults, inter-turn faults, and ground faults in equipment with low-impedance or solidly grounded neutrals. Its multi-slope percentage bias characteristic allows for compensation of CT ratio error mismatch and differences in CT response. In addition to differential protection, the MD32G provides phase and ground time-overcurrent and breaker failure protection.

• Catalog Section 150-32  
• Instruction Manual S150-32-1  

The SPM21 provides automatic synchronizing for any size generator. This relay monitors the bus and generator voltage, frequency, and phase angle and provides automatic control to the generator’s governor and voltage regulator to bring the unit into synchronization and initiate breaker closing. The breaker closing time is also taken into account to determine the advanced closing angle required to provide synchronizing with a minimum phase angle displacement. The SPM21 provides for dead bus operation, whereby the ability to connect the generator to a dead bus may be controlled.

• Catalog Section 150-55  
• Instruction Manual S150-55-1  

The SCM21 relay provides permissive synchronization with one or two lines against a common bus. The relay checks the voltage, frequency, and phase angle displacement between each line and the bus. When the values are with the set parameters, the SCM21 provides an contact output for permissive breaker closing. The SCM21 also provides for dead line and dead bus operation.

• Catalog Section 150-40  
• Instruction Manual S150-40-1  

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