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Miniature Relays For Electronics Analog Switches

Orion Italia

IPR-A

Article: 00086643

Electromechanical relay / protection / current monitoring / panel-mount

The Current Protection Relay (IPR-A) has been designed to measure the line and ground RMS currents under normal conditions or under disturbances. The current signals are sensed throughout current transformers (CT) from each line. This information is internally processed by the microprocessor, to take the current protection actions defined under ANSI, IAC or IEC standard. The different functions provided by the IPR-A may be classified into the following groups:

Applications:
- Primary and backup protection for power plants, utility and industrial distribution systems.
- Protection of transformers, overhead lines, cables and generators.
- Permits the opening of the switch/disconnector within the limits of its capacity, those identifying the excess (e.g. straight short-circuits), leaving the circuit interruption to the back-up fuses.

Protection:
- CT primary ratio selectable in 5 amp steps (10 A to 5000 A).
- Inverse time phase overcurrent (ANSI 51) and inverse time ground overcurrent (ANSI 51N/51G), with selection of curves according to ANSI, IAC or IEC/BS142, as follows:
Moderately inverse.
Standard inverse.
Very inverse.
Extremely inverse.
Definite time.

- Instantaneous overcurrent (ANSI 50).
- Instantaneous ground overcurrent (ANSI 50N/50G).
- Overload alarm adjustment to one level.
- Accumulated KA per phase on breaker interruption.
- 1 trip relay and 1 alarm relay.
- Loss of control volts relay.

Specifications

  • Type: electromechanical
  • Function: protection, current monitoring
  • Form: panel-mount
  • Other characteristics: IEC, digital
  • Applications: general purpose
  • Load current: 8 A
  • Load voltage: 250 V

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