Protection relays

DEIF manufactures a comprehensive range of tested Multiple protection & single-function protection units. The microprocessor-based, protection integrate maximum protection functionalities as standard and confirms to various global standards..

Medium Voltage Relay MVR-200 series

Three phase overcurrent protection stages INST, DT or IDMT
(Sensitive) Earth-fault protection stages INST, DT or IDMT
Harmonic overcurrent protection / inrush blocking stages INST, DT or IDMT
Cold-load pick-up block
Current unbalance / broken conductor protection stages INST, DT or IDMT
Thermal overload protection (line)
Restricted earth fault protection (low-imp)
Cable-end differential protection
Directional three-phase overcurrent protection stages DT or IDMT
Directional (sensitive) residual overcurrent protection stages DT or IDMT
Intermittent earth fault
Fault locator
Overvoltage protection stages INST, DT or IDMT
Undervoltage protection stages INST, DT or IDMT
Positive sequence under/overvoltage protection stages INST, DT or IDMT
Residual voltage protection stages INST, DT or IDMT
Frequency protection stages
Rate of change of frequency
Vector Jump / surge
Reverse/under/over power protection stages INST, DT or IDMT
Synchrocheck
Auto-reclose
Fuse failure
Current transformer supervision
Switch onto fault logic
Breaker failure protection
Programmable stage

Flere detaljer

Loss of mains relay LMR-111D

Vector shift
Detection of vector shift
ANSI code 78
Mains disconnection on mains failure
Ensures no asynchronous reconnection
LED indication of fault condition
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Loss of mains relay LMR-122D

Vector shift and df/dt (ROCOF)
Detection of vector shift
ANSI code 78
Mains disconnection on mains failure
Ensures no asynchronous reconnection
LED indication of fault condition
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Current relay RMC-111D

Short circuit relay (I>>)
ANSI code 50 and 51
Measurement of 3-phase currents
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mountin

Flere detaljer

Current relay RMC-121D

Short circuit and over-current circuit relay (I> + I>>)
ANSI code 50 and 51
Measurement of 3-phase currents
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Current relay RMC-131D

Differential current relay
ANSI code 87
Measurement of 3-phase currents
Non-stabilised measurement
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
Extra change-over relay contact for signalling
35 mm DIN rail or base mounting

Flere detaljer

Current relay RMC-132D

Double over-current relay (I> + I>)
ANSI code 50 and 51
Measurement of 3-phase currents
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Current relay RMC-142D

Earth fault protection at two levels
Built-in filter for 3rd harmonic
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mountin

Flere detaljer

Frequency relay RMF-112D

Combined under-frequency/over-frequency
For 1- and 3-phase networks
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Power relay RMP-111D

Generator and prime mover protection
ANSI code 32
3-phase measurement
LED indication of alarm condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Power relay RMP-112D

Generator and prime mover protection
ANSI code 32
3-phase measurement
LED indication of alarm condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Power relay RMP-121D

Generator and prime mover protection
ANSI code 32
3-phase measurement
LED indication of alarm condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mountin

Flere detaljer

Loss of Excitation Relay/Over-excitation Relay RMQ-111D & RMQ-121D

Generator under-excitation protection
ANSI code 40
Single-phase measurement
Timer-controlled tripping
LED indication of fault/activated relay
35 mm DIN rail or base mounting

Flere detaljer

Voltage relay RMV-112D

Under- and over-voltage.
U>: 100 to 120 %, U<: 80 to 100 %.
Under-voltage/over-voltage (U< + U>)
ANSI code 27 and 59
3-phase measurement
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Voltage relay RMV-122D

Over-voltage (double).
U>: 100 to 120 %,U>: 100 to 120 %.
Under-voltage/over-voltage (U< + U>)
ANSI code 27 and 59
3-phase measurement
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Voltage relay RMV-132D

Under-voltage (double).
U<: 80 to 100 %, U<: 80 to 100 %.
Under-voltage/over-voltage (U< + U>)
ANSI code 27 and 59
3-phase measurement
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Voltage relay RMV-142D

Under- and Over-voltage.
U>: 100 to 120 %, U<: 80 to 100 %.
Single phase measurement.
Under-voltage/over-voltage (U< + U>)
ANSI code 27 and 59
3-phase measurement
LED indication of fault condition
Timer-controlled tripping
LED indication for activated relay
35 mm DIN rail or base mounting

Flere detaljer

Protection relays

Relaterede produkter

Vi er også meget sociale