Protector Relays

Digital Earth Leakage Relay (96 x 96 mm)
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Digital Earth Leakage Relay (96 x 96 mm)

The purpose of Earth Leakage protection is to measure the Earth leakage current of an electrical installation, or part of an installation, and interrupt the power supply if the Earth-Leakage current becomes dangerous to property.

Digital Earth Leakage Relay (DIN Rail)
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Digital Earth Leakage Relay (DIN Rail)

The purpose of Earth Leakage protection is to measure the Earth leakage current of an electrical installation, or part of an installation, and interrupt the power supply if the Earth-Leakage current becomes dangerous to property.

Digital Line Monitoring Relay
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Digital Line Monitoring Relay

RISH Relay V/Hz is used to protect against Over Voltage, Under Voltage, Phase Unbalance, Phase Sequence detection, Phase Failure detection, Under and Over Frequency conditions.

Digital Voltage Protection Relay
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Digital Voltage Protection Relay

RISH Relay V is used to protect against Over Voltage, Under Voltage, Phase Sequence detection, Phase Failure detection conditions.

Digital Current Monitoring Relay
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Digital Current Monitoring Relay

RISH Relay I is used to protect against Over Current, Under Current, Current Loss, Current Un balance.

Speed Sensing Trip Relay

Speed Sensing Trip Relay

The Speed Sensing Relay provides three user adjustable trip levels with LED relay state indicator and a speed indicator output signal.

Hot- Spot 3 Relay

Hot- Spot 3 Relay

The Temperature trip relay has been designed to monitor three separate temperature zones in large electric motors, transformer winding or any temperature conscious equipment such as process lines gas turbines or engine driven generating sets, using Resistance Temperature Detectors (RTDs).

Earth Fault Relay

Earth Fault Relay

The relay is provided with settable EFR, current trip settings & settable trip time delay. Relay energises on fault condition. External CTs to be installed along with EFR, of secondary rating of 5 A or 1 A, can be selected via terminal 1 & 2 or 1 & 3 respectively.

Motor-Protection Relay

Motor-Protection Relay

The Motor protector relay is designed to monitor the correct phase rotation or sequence of 3 phase system R, Y, B. Rotating machines are particularly vulnerable to incorrect phase sequence.

Hot- Spot 6 Relay

Hot- Spot 6 Relay

The Hot spot 6 is a temperature trip relay accepting up to six inputs from resistance temperature detector (RTD) elements.The temperature trip point, common to all six channels,is user adjustable.  

Synchro-check Relay

Synchro-check Relay

The Synchro - check relay can be used to assist in the semiautomatic paralleling of two ac power systems.The Rishabh Paralleling protector provides manual / automatic switching of generator to busbar without damage or disturbance to the system.

Transducer Trip Relay

Transducer Trip Relay

The Transducer trip will accept analogue signal from most measuring transducer and transmitters, in the form of DC voltage or currents. Inputs are monitored within the preset limits and in the event of the input moving outside these limits. 

Thermistor trip Relay

Thermistor trip Relay

The protector operates by de - energizing a relay when the thermistors fitted into a motor stator detect a temperature condition. An illuminated green LED indicates critical when the temperature is within normal working limits.

Phase Sequence & Phase Failure Relay

Phase Sequence & Phase Failure Relay

The Protector is designed to monitor the correct phase rotation or sequence of 3 phase system L1, L2, L3. Rotating machines are particularly vulnerable to incorrect phase sequence.

Reverse-Power Relay

Reverse-Power Relay

The Reverse Power Protector provides continuous surveillance for AC generators operating in parallel or for boosting mains supplies.On site adjustment of the trip point and time delay ensures accurate protection.

Phase Balance Relay

Phase Balance Relay

The protector de-energizes a relay should any one of the above faults occur. It is fitted with an adjustable time delay to eliminate premature operation on short duration supply fluctuations. A red LED indicates that the supply is within limits & that the output relay is energised.

Combined Under / Over Voltage & Frequency Relay

Combined Under / Over Voltage & Frequency Relay

The combined voltage & frequency Protectors give continuous surveillance of the monitored circuit. The product offers user adjustable trip point ( set point ) for voltage and frequency, plus adjustable time delay setting. 

Mili-Volt / Thermo-couple Relay

Mili-Volt / Thermo-couple Relay

The Protector trip accepts DC Millivolt inputs from transducers or shunts or from any standard thermocouple. The Relay offers user adjustable trip point ( Set point ) and time delay settings. The typically 0 to 10 seconds, although longer delays are available.

Frequency Relay

Frequency Relay

The frequency protectors provide continuous surveillance of the monitored circuit. When the frequency moves outside the set point limit, the relay will operate giving an alarm, control or tripping single. An illuminated LED indicates when the relay is energized.

AC Voltage Relay with Adjustable Time delay

AC Voltage Relay with Adjustable Time delay

The AC Voltage protector provides continuous surveillance of the monitored circuit. When the measured voltage moves outside the set point limit, the relay will operate after the selected time delay, giving an alarm and or initiation signal. 

DC Voltage Relay

DC Voltage Relay

The DC Voltage protectors provide continuous surveillance of the monitored circuit. When the measured voltage moves outside the set- point limits, the relay will operate after the selected time delay or differential, giving an alarm and / or initiation signal.

AC Voltage Relay with Adjustable Differential

AC Voltage Relay with Adjustable Differential

The AC Voltage Protectors provides continuous surveillance of the monitored circuit. When the measured voltage moves outside the set point limit, the relay will operate giving an alarm and or initiation signal.

AC Current Relay

AC Current Relay

The AC Current provides continuous surveillance of the monitored circuit. When the measured current moves outside the set point limit, the relay will operate. An adjustable time delay is provided to prevent the relay from tripping for a predetermined period to prevent nuisance tripping.