Product Profile of Three Elements Numerical Differential/ Over Current Protection Relay
Three Elements Numerical Differential/ Over Current Protection Relay enables Instantaneous Over-Current Protection with adjustable Timer and has the facility of Internal calculation of zero seq. EF current. The Differential/ Over Current Protection Relay also protects against negative sequence over current. Ashida Eletronics Pvt. Ltd., an ISO 9001:2008 certified company manufactures Three Elements Numerical Differential/ Over Current Protection Relay.
Ashida Eletronics Pvt. Ltd. offers a wide range of electrical power protection relays, auxiliary protection relay and SCADA systems. The Three Elements Numerical Differential/ Over Current Protection Relay allows Programmable starting current and dual bias setting.
Salient features of the Three Elements Numerical Differential/ Over Current Protection Relay:
Transformer Differential + Over Current + Restricted Earth Fault.
3 Element [3 Phase + 3Io] Over current IDMT/DMT with instant Trip.
Selection of Curve: Five selectable curve- Normal Inverse, Very Inverse, Extremely Inverse, Long Time Inverse and Define Time.
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.
In-built CB Trip Circuit Supervision function during pre closing and post closing of CB.
Breaker Failure Detection.
Disturbance Recorder. Up to 3 sec of actual waveform of current along with logical and physical status are captured and saved in the built-in memory, with date time stamping for analyzing fault condition & fault location.
Fully communicable with IEC 60870-5-103.
Continuously monitors the module`s internal hardware and alarm is generated in case of failure of any critical components
Large 20X4 LCD display for Parameter and setting display.
On site CT Secondary selection 1A or 5A.
Very low burden on CT [less than 0.2VA]
Operation based on fundamental frequency value.
Latching of fault current value.
8 Digital Output contacts for local Alarm as well as Tele-signalling.
