DEFINTE TIME DELAYED
VOLTAGE RELAYS

Application
This kind of relay provides definite time voltage protection with a choice of three versions. The HRUV 11 and HROV12 provide definite time under voltage protection respectively and can be employed for the protection of plant and feeder systems.
An application of the HRUV11 includes the protection of induction motors against the restoration of supply following the loss or server reduction in power supply.
The HROV 12 can be used for protection of synchronous motors and motors driving high inertia loads.
The relay has been designed to operate over a wide frequency range. It can be used for the protection of hydro generators against over speed.

Type
HRUV 11/ HROV 12

Voltage rating
(Vn) 100 or 110V

Rated frequency
50 Hz

Time delay range
0 – 16.5 in steps of 100 sec

Rated frequency Fn
50 Hz

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