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Rishabh Relay VR-3 Three Phase Voltage Protection Relay

Rishabh Relay VR-3 Three Phase Voltage Protection Relay

Brand
Rishabh
Model number
Relay VR-3

Self-powered 17.5 mm 3-phase voltage relay with on-site nominal voltage, trip points (OV 105 - 125%, UV 75 - 95%) and 0 - 10 s delay; protects against over / under voltage, phase unbalance, phase failure, incorrect phase sequence and neutral failure.

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Key features

  • Compact 17.5 mm width
  • True RMS measurement
  • Protection against over / under voltage, phase unbalance, phase failure, incorrect phase sequence and neutral failure
  • Adjustable nominal voltage, trip point and trip time delay
  • Over and under voltage faults can be disabled on site
  • On-site selection of V L-L / V L-N based tripping
  • Self powered
  • 1 CO or 1 CO + 1 CO relay configuration
  • LED indication for faults
  • Applications: motor protection, server rooms, control systems

Specifications

Input
Nominal voltage (Vn)3 phase L: 110 - 240 V L-L (63 - 138 V L-N); M: 381 - 388 - 415 V L-L (220 - 230 - 240 V L-N); H: 415 - 440 - 480 V L-L (240 - 254 - 277 V L-N), programmable on site
Max. continuous input voltage127% of nominal value
Nominal frequency50 / 60 Hz
Burden< 2 VA approx. per phase; < 4 VA approx. three phase
Voltage range70 - 125% of nominal value
Settings
Over voltage trip point105 - 125% (variable)
Under voltage trip point75 - 95% (variable)
Voltage unbalanceTrip point 20% (fixed)
Phase failureTrip point 70% (fixed)
Hysteresis3% (fixed) of trip point; 3% of Vn for unbalance
Trip delay0 - 10 s variable for under voltage, over voltage and unbalance; instant tripping for phase reversal, neutral fail and phase fail
Reset delay1 s (fixed)
Power on delayApprox. 3 s (fixed)
Accuracy
Tripping±3% of nominal value; ±0.8 s for trip delay
Response timeLess than 200 ms
Relay contacts
Types1 CO or 1 CO + 1 CO (normally energized; de-energized on request)
Rating5 A / 250 V AC / 30 V DC (resistive load)
Mechanical endurance1 x 10^7 operations
Electrical endurance1 x 10^5 operations
General
Operating temperature-10 to +55 °C
Storage temperature-25 to +70 °C
Relative humidity0 - 90% non condensing
Shock15g in 3 planes
Vibration10 - 55 Hz, 0.15 mm amplitude
EnclosureIP20 (front face only)
Dimensions18 x 98.6 x 66.5 mm (17.5 mm wide module)
Weight80 g approx.
Standards
SafetyIEC 61010-1-2010
Installation categoryCAT III, pollution degree 2
High voltage test2.2 kV AC, 50 Hz for 1 minute between all electrical circuits
Ordering
Order codeVR-3-[L / M / H]-[1 / 2 relays], e.g. VR-3-M-2

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

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