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Rishabh 253-MPR Motor Protection Relay (Phase Loss, Reversal, Unbalance)

Rishabh 253-MPR Motor Protection Relay (Phase Loss, Reversal, Unbalance)

Brand
Rishabh
Model number
253-MPR

Motor protection relay using negative sequence voltage sensing: trips on phase reversal, phase loss and voltage unbalance (30 - 70 V), delay 3.5 s; auto, manual or remote reset.

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Key features

  • Phase sequence (reversal) protection
  • Phase loss protection
  • Adjustable unbalance voltage
  • Testing simulation without connecting the inputs
  • Automatic, manual and remote reset
  • LED trip and power ON indication
  • 2 pole relay contacts
  • Polycarbonate casing and clear terminal cover (UL 94 V-0)
  • Applications: pumps, compressors, mixers, motors, gensets, all rotating machines

Specifications

Input
System voltage110, 220, 230, 240, 380, 415 V AC ±20%
Nominal frequency50 Hz ±3%
Voltage withstand1.2 x rating continuously, 1.5 x rating for 10 s (BS 6253)
Auxiliary supply
Voltage110, 220, 230, 240, 380, 415 V AC ±20%
Burden3 VA
Setpoint
Unbalance trip setting30 to 70 V ±9 V
Set accuracy±10% of set value
Time delay3.5 s ±1.5 s
ResetAutomatic, manual, remote
Output relay
TypeD.P. changeover
RatingA.C. 240 V 5 A; D.C. 24 V 5 A resistive
Operations0.5 million at 100% loads
Indication
LEDsL1 power ON, L2 trip
General
EnclosurePolycarbonate (UL 94 V-0)
DimensionsOverall 75 x 70 x 112 mm, mounting 35 x 55 mm
Weight400 g approx.

Specifications are from the manufacturer's published information. Confirm critical values with us or the datasheet before ordering.

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