Dir Non Dir Overcurrent Relay Manufacturer,Supplier and Exporter in India
Product Code : EL-EPP-11362
The relay enables investigations into protection and monitoring of generator and transformer schemes, overhead lines, underground cables and backup on high-voltage systems.
The relay is housed in a robust enclosure with carrying handle.
The module mounts on the desk area of the Protection and Relay Test Set, and connects to it using a multi-core cable and safety leads.
This relay is also an optional ancillary for selected products in Power Systems range.
The relay module is based on the industrial relay.
The lecturer or student sets up different fault circuits on the Protection and Relay Test Set.
They then use the keypad and display on the relay module to program it to the settings needed for the tests.
They can also use the software and a suitable computer to program the relay module.
The relay module is then connected to the fault circuits so tests can be performed.
Most tests are performed using single relays.
The main functions of the Directional/Non-Directional Overcurrent Relay include:
Three independent stages of directional/non-directional
phase overcurrent (ANSI 50, ANSI 51, ANSI 67).
The first stage may be set to any of 12 IDMT curves, the remaining two having a direct time characteristic.
Thermal overload protection (ANSI 49)
Directional/non-directional earth fault (ANSI 67N, ANSI 50N, ANSI 51N)
Selectable blocking
Under voltage (ANSI 27)
Overvoltage (ANSI 59)
Undercurrent (ANSI 37)
Creating fault and disturbance records
Negative phase sequence overcurrent (ANSI 46)
Connection to the experimental circuit is via current transformers with ratio to suit the inputs of the relay.
This provides an effective demonstration of the effect of current and voltage transformer ratio, connection and rating on protective relays.
