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Rishabh Relay AR-3 Three Phase Current Protection Relay

Rishabh Relay AR-3 Three Phase Current Protection Relay

Brand
Rishabh
Model number
Relay AR-3

3-phase current relay for 1 - 5 A CT circuits: over current (30 - 140%), under current (10 - 95%), current unbalance, adjustable hysteresis and 0 - 10 s delay; auto / manual reset.

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Key features

  • Over current and under current protection plus current unbalance protection
  • Nominal current set on site from 1 A to 5 A
  • Potentiometer-adjustable trip points, hysteresis and time delays
  • Auto / manual reset selectable on site (PRG/RST key)
  • True RMS measurement (up to 15th harmonic)
  • LED indication for power on, under current, over current and current unbalance
  • Relay energize / de-energize on fault option
  • Applications: motors (overload, locked rotor), gensets, transformer protection, ground fault protection

Specifications

Input
Nominal current1 A to 5 A settable
Max. continuous input current145% of maximum nominal input current
Overload withstand20 x for 1 s, repeated 5 times at 5 min
Current range5 - 140% of nominal value
Frequency40 - 70 Hz
Current burden< 0.25 VA approx. per phase at nominal
Auxiliary supply
Voltage60 V - 300 V AC/DC (nominal 230 V AC, 50/60 Hz)
Frequency45 to 66 Hz
Burden< 3 VA approx.
Settings
Over current trip point30 - 140% (variable)
Under current trip point10 - 95% (variable)
Current unbalanceTrip point 20%, trip delay 5 s, hysteresis 5% (fixed); enable / disable on site
Hysteresis5 - 50% (variable) of trip point
Trip delay0 - 10 s variable for under current and over current
Reset delay1 s (fixed)
Power on delayApprox. 3 s (fixed)
Accuracy
Measurement±2% of nominal value
Setting±6% of nominal value; ±0.8 s for trip delay
Response timeLess than 140 ms
Relay contacts
Types1 CO or 1 CO + 1 CO, normally energized or de-energized
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)
Weight175 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 codeAR-3-[1 / 2 relays]-[1: energized / 2: de-energized], e.g. AR-3-2-1

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

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