Features of the OVR Overvoltage Relay:

An OVR in conjunction with a Novaris surge filter or diverter provides the ultimate level of protection for your application.
Novaris over/under voltage protection is designed for the protection of equipment against extended over voltages such as line-to-line faults in a three-phase system, and extended voltage sags that may cause excessive current consumption in induction motors.
The incoming supply is monitored by the over / under voltage relay where it is compared to user-defined high and low cut-off points.
Should the voltage rise or fall outside of these points the relay will de-energise the main contactor thereby isolating all loads, including the surge protection.
When the supply voltage returns to normal the relay will re-energise the main contactor, restoring power to the surge protector and all connected loads. Because the contactor opens in front of the main surge protection, it also eliminates the risk of MOV overload due to sustained overvoltages.
The over / under voltage relay and its associated circuitry can withstand a 415V phase-to-neutral fault voltage indefinitely.
Even with the surge protection isolated during a fault condition, each sensor input is protected by an auxiliary filter against surge currents of up to 50kA (8/20µs).
Voltage thresholds are user-adjustable between 180 - 240VAC for under voltage tripping and 240 - 300VAC for over voltage tripping. There is additional provision hysteresis setting up to 15% of the applied voltage, which can be used to prevent nuisance tripping if the measured signal is noisy or unstable.

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Novaris | Global Solutions in Surge Protection

Novaris has designed and manufactured lightning and electrical disturbance protection systems since 1993. We specialise in the protection of power and data signalling. Our products are in use locally, nationally and internationally, and we are now world leaders in lightning and surge protection technology. At our Australian headquarters we operate a full time research and development group, employing professional engineers, technical officers and drafting support staff. Our testing laboratory is capable of generating and measuring simulated lightning impulses in accordance with world power and telecommunications standards. We also have offices and distributors throughout Australia and worldwide. We design, supply and provide advice on structural lightning protection and earthing systems for all structures in accordance with recognised world standards. Our products range from main switchboard and distribution board surge protection, PLC and control system protection, to RF coaxial cable and telecommunications protection. Our quality, performance and reliability is second to none.

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