Product Profile of Programmable Numerical Protection Relay

Programmable Numerical Protection Relay is designed for Ring Main Unit [RMU] and does not require auxiliary voltage supplies. The Numerical Protection Relay operates on three external status input for SCADA and has remote trip facility. Ashida Eletronics Pvt. Ltd., an ISO 9001:2008 certified company manufactures Programmable Numerical Protection Relay.

Ashida Eletronics Pvt. Ltd. Offers a wide range of electrical power protection relays, auxiliary protection relay and SCADA systems. The Programmable Numerical Protection Relay takes power from CT`s and continuously monitors all 3 phases and earth current, through CT connections.

Salient features of the Programmable Numerical Protection Relay:

• Low energy pulse output tripping for RMU.

• User friendly setting procedure with wide setting range.

• 4 Element [3 Phase + 1 Earth Fault] Over current IDMT/ Definite time and Instant Trip.

• RS 232 and RS 485 Communication Port for remote SCADA. [only for ADR241S]

• Programmable [Non Volatile] setting by local keyboard as well as remote setting by communication port.

• LCD Display for settings / parameters.

• Display of Fault current as well as Load current.

• Latching of last 5 fault with relay time

• Selectable Inverse Time Characteristics [Five selectable curves]: Normal Inverse, Normal Inverse, Very Inverse, Extremely Inverse, Long Time Inverse and Define time

• Separate curve setting for phase and EF

• Internal Battery for maintaining LCD display and communication during fault condition.

• Designed using DSP technology.

• Latching of Fault Current and storing in a non-volatile memory with time stamping.

• Three External status input for SCADA

• Remote trip [same as selected Auxiliary supply voltage].

• External latching type potential free contacts.