Product Profile of Differential Type Over Current Protection Relay

Differential type Over Current Protection Relay is a numerical three phase relay designed for instantaneous over-current protection and is provided with adjustable timer. The Over Current Protection Relay is equipped with the facility of internal calculation of zero seq. EF current [3Io]. Differential type Over Current Protection Relay is manufactured by Ashida Eletronics Pvt. Ltd., an ISO 9001:2008 recognised company.

Ashida Eletronics Pvt. Ltd. Also manufactures a wide range of electrical power protection relays, auxiliary protection relay and SCADA systems. The Differential type Over Current Protection Relay is available with programmable internal ICT [Interposing CT] ratio to match different transformer having different vector groups.

Salient features of the Differential type Over Current Protection Relay:

• Transformer Differential + Over Current + Restricted Earth Fault.

• 3 Element [3 Phase + 3Io] Over current IDMT/DMT with instant Trip.

• Instantaneous Over-Current Protection with adjustable Timer.

• Internal calculation of zero seq. EF current [3Io].

• Negative Sequence Over Current [46].

• Selection of Curve: Five selectable curve [Normal Inverse 1 [C1], Normal Inverse 2 [C2], Very Inverse [C3], Extremely Inverse [C4], Long Time Inverse [C5]] and Define Time [C6].

• Programmable starting current and dual bias setting.

• Harmonic Restrain for Transformer charging and CT saturation condition.

• Unrestrained Differential Protection.

• Programmable Internal ICT [Interposing CT] ratio to match different transformer having different vector groups.