Protection & Monitoring Relays

Relays that protect and monitor electrical systems: voltage, current, phase, earth leakage and power factor control.

Rishabh 256-PLL Synchro-Check Relay, Live Bus

Synchro-check relay for paralleling two AC systems: monitors voltage, phase and frequency of both and energises only when they match, so the breaker can close safely.

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Rishabh 256-PRA Hot Spot 3 RTD Temperature Relay, 3 Setpoints

Temperature trip relay for up to three RTD zones (motor or transformer windings): picks the highest reading, gives a 1 mA output and 3 adjustable setpoints with SPDT relays.

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Rishabh 256-PRB Hot Spot 3 RTD Temperature Relay, 2 Setpoints

Temperature trip relay for up to three RTD zones (motor or transformer windings): picks the highest reading, gives a 1 mA output and 2 adjustable setpoints with SPDT relays.

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Rishabh 256-PRC Hot Spot 3 RTD Temperature Relay, 1 Setpoint

Temperature trip relay for up to three RTD zones (motor or transformer windings): picks the highest reading, gives a 1 mA output and 1 adjustable setpoint with SPDT relay.

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Rishabh DMCi Touch Screen Demand Monitor and Controller

Rish DMCi touch screen maximum demand monitor and controller: predictive demand control with 4 relays, W / VAr / VA / current demand, harmonics to 56th and class 0.5S energy.

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Rishabh ELPR Smart Earth Leakage Protection Relay (Smart)

DIN-rail earth leakage relay with CBCT input: In 30 mA - 30 A and trip delay 0 - 10 s set by potentiometer, CBCT open detection, bar graph LEDs; alarm relay (optional 1 NO, operates above 50% of set In).

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Rishabh ELPR Smart+ Earth Leakage Protection Relay (Smart+)

DIN-rail earth leakage relay with CBCT input: In 30 mA - 30 A and trip delay 0 - 10 s set by potentiometer, CBCT open detection, bar graph LEDs; DIP switches for auto re-closure, fail-safe or alarm relay and main relay configuration.

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Rishabh ELR Digital Earth Leakage Relay

Digital earth leakage relay with one CBCT input: 30 mA - 30 A trip setting, pre-alarm, CBCT open detection, 4-digit LED display, last 15 faults stored; DIN rail or 96 x 96 panel.

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Rishabh ELR+ Digital Earth Leakage Relay, Two CBCT Inputs

Digital earth leakage relay with two CBCT inputs, so one relay protects two different loads: 30 mA - 30 A settings, pre-alarm, CBCT open detection, 4-digit LED display.

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Rishabh ELR VI Digital Earth Leakage Relay with Voltage and Current Protection

Earth leakage relay with CBCT, current and voltage inputs: leakage plus over/under voltage, over/under current and reverse power protection, and V, I, leakage measurement.

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Rishabh ELR VI (NE) Digital Earth Leakage Relay with Earth to Neutral Voltage Protection

Earth leakage relay with CBCT and current inputs plus earth-to-neutral voltage measurement and protection (1 to 5 V AC); 30 mA - 30 A leakage setting, 4-digit LED display.

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Rishabh PFC 08 Power Factor Controller, 96 x 96 mm

APFC relay (96 x 96 mm) for capacitor bank switching with 4, 6 or 8 control outputs plus alarm relay; auto-initialisation, test run, energy and harmonics up to 31st; Modbus / RTC optional.

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Rishabh PFC 08L Power Factor Controller with LED Display, 96 x 96 mm

Plug-and-play APFC relay (96 x 96 mm) with 4, 6 or 8 steps and 3-digit LED display: auto CT polarity correction, auto bank detection, target cos phi fixed at 0.99 inductive.

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Rishabh PFC 12 Power Factor Controller, 144 x 144 mm

APFC relay (144 x 144 mm) for capacitor bank switching with 6, 8 or 12 control outputs plus alarm relay; auto-initialisation, test run, energy and harmonics up to 31st; Modbus / RTC optional.

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Rishabh Relay AR-1 Single Phase Current Protection Relay

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

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Rishabh Relay AR-3 Three Phase Current Protection Relay

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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Rishabh Relay I Current Protection Relay

Digital current protection relay cum class 0.5 DPM: over current with IDMT curves, under current, current loss and unbalance protection; CT ratio programmable to 999 kA, 2 relay outputs.

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Rishabh Relay PHR Phase Protection Relay

Self-powered 3-phase relay for 110, 240, 415 or 440 V L-L systems: trips on phase failure (70%), voltage unbalance (20%) and incorrect phase sequence; auto reset, 1 CO 5 A contact.

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Rishabh Relay UVR Under Voltage Protection Relay

Self-powered 17.5 mm under voltage relay: trips below 75% of nominal (3P4W 415/400/380 V or 1P2W 240/230/220 V), adjustable 5 - 15 min restart delay, auto reset, 1 CO contact.

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Rishabh Relay V Voltage Protection Relay

Digital voltage protection relay cum class 0.5 DPM: over / under voltage, phase failure and incorrect phase sequence protection, PT ratio programmable, adjustable delays, 2 relay outputs.

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Rishabh Relay V/Hz Line Monitoring Relay (Voltage and Frequency)

Digital line monitoring relay cum class 0.5 DPM: over / under voltage, phase failure, unbalance, incorrect sequence and over / under frequency protection, PT ratio programmable, 2 relays.

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Rishabh Relay VR-1 Single Phase Voltage Protection Relay

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

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Rishabh Relay VR-3 Three Phase Voltage Protection Relay

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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Rishabh SPPR Single Phase Preventer Relay

Self-powered 17.5 mm relay for 3-phase 3-wire systems (150 - 550 V L-L) that trips on phase failure, phase unbalance and incorrect phase sequence; auto reset, 1 CO 6 A contact, fault LEDs.

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