Over Current Protection and Switchgear Protection

An overcurrent protection exists when current exceeds the rating of conductors or equipment. It can result from overload, short circuit, or ground fault.

The ADR241C is a 3 OC and 1 EF Communicable Medium Voltage Protection relay with Instantaneous high set and programmable output design in very compact cabinet.

Numerical Communicable 3OC + 1EF Protection Relay : ADR241C includes -

· 4 Element (3 Phase + EF) over current IDMT with instant trip.

· Instantaneous OC Protection with adjustable Timer.

· Selection of Curve: Six selectable curves (Normal Inverse1 (C1), Normal Inverse2 (C2), Very Inverse (C3), Extremely Inverse (C4), Long Time Inverse (C5) & Definite Time (C6).

· Separate curve selection for phase and EF.

· Latching of fault current up-to last 5 fault.

· Site selectable CT secondary

· Breaker Fail & Trip circuit supervision.

· RS 485 Port for Remote SCADA & IEC60870–5–103 Protocol for Communication.

A switchgear protection is a generic term which includes all the switching devices associated with mainly power system protection. It also includes all devices associated with control, metering and regulating of electrical power system.

Numerical 3 OC & 1 EF Switchgear Protection Relay : ADR141A includes –

The ADR141A is a 3 OC and 1 EF Switchgear Protection relay with Instantaneous high set and programmable output to simplify feeder protection wiring.

· 4 Element (3 Phase + EF) over current IDMT with instant trip.

· Display of fault current. / Load current.

· Selection of Curve: Six selectable curves (Normal Inverse1 (C1), Normal Inverse2 (C2), Very Inverse (C3), Extremely Inverse (C4), Long Time Inverse (C5) & Definite Time (C6).

· Separate curve selection for phase and EF.

· Latching of fault current up-to last 5 fault.

· Site selectable CT secondary

· Programmable Annunciation Contact

· Trip circuit supervision function.

· Breaker Fail.

For more info: http://www.ashidaelectronics.com