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 Medium Voltage Relay

The MVR-200 series combines reliable protection, control and measuring functionality in a single device for medium and high voltage applications.

 Medium Voltage Relay

The MVR-200 series combines reliable protection, control and measuring functionality in a single device for medium and high voltage applications.

The MDR-2 is a state-of-the-art combined differential protection and short-circuit protection relay for generator protection against internal short circuits (leaking currents). 

DEIF's differential current relay RMC-131D protects the generator against short circuits and leakage currents in the windings of the generator. 

DEIF's RMV protective voltage relays are applied for generator, motor and transformer protection against adverse system voltage conditions. The versatile unit features a number of adjustable parameters. 

• Under- and over-voltage
• U>: 100 to 120 %, U<: 80 to 100 %

DEIF's RMV protective voltage relays are applied for generator, motor and transformer protection against adverse system voltage conditions. The versatile unit features a number of adjustable parameters.  

• Over-voltage (double)
• U>: 100 to 120 %, U>: 100 to 120 %

DEIF's RMV protective voltage relays are applied for generator, motor and transformer protection against adverse system voltage conditions. The versatile unit features a number of adjustable parameters.  

• Under-voltage (double)
• U<: 80 to 100 %, U<: 80 to 100 %

DEIF's RMV protective voltage relays are applied for generator, motor and transformer protection against adverse system voltage conditions. The versatile unit features a number of adjustable parameters.  

• Under- and Over-voltage
• U>: 100 to 120 %, U<: 80 to 100

The digital RMF-112D unit is part of DEIF’s complete range of relays for generator protection and control.

Applied for protection against under-frequency and overfrequency by supervising the frequency (of generators) in single-phase and 3-phase networks, RMF-112D is applicable for installations with a number of adjustable parameters.

The RMC-111D short circuit relay is applied in cases where only protection against short circuit currents is required. 

The RMC-121D combined short circuit and over-current relay is applied for protection of generators against both over-currents and short circuit currents. 

This double over-current relay is applied in cases where protection against over-currents at two levels is required. 

DEIF's RMC-142D stator earth fault relay protects genset operators against electric shock in case of earth faults in the generator's stator. 

DEIF's loss of mains relays protect generators against damage resulting from a non-synchronised reconnection to the grid after a temporary mains failure. 

•  Vector shift 

DEIF's loss of mains relays protect generators against damage resulting from a non-synchronised reconnection to the grid after a temporary mains failure. 

• Vector shift and df/dt (ROCOF) 

The RMP-111D is a protective overload power relay for generator and prime mover protection. 

The RMP-112D is a protective overload and reverse power relay for generator and prime mover protection. 

DEIF's RMP-121D is a protective reverse power relay for generator and prime mover protection. 

 Loss of Excitation Relay/Over-excitation Relay

This Uni-line relay protects generators running in parallel with other generators from running as an induction generator due to under-excitation – particularly in cases where applying an under-voltage relay for protection is insufficient.