Numerical Draw-out 3 O/C
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Prok dv's make PNA TYPE IDMT/DEFINITE TIME/INSTANTANEOUS LOW-SET/HIGH-SET NONDIRECTIONALNUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCR) WITHEARTH FAULT RELAY (EFR) or independent over current Relay (OCR) or earth fault relay (EFR).This is intended for protection application in medium voltage networks. These networks mayhave isolated or resistance impedance earthed or solidly earthed neutral points. Definitetime over current relays are both suited for isolated systems and for use as back up todifferential relays and distance relays. Inverse time relays (over current relays with variousinverse times - current characteristics) are advantageous for interconnected systems andsolidly grounded systems. Another tool for reducing the tripping time for faults near thesource is to use the added instantaneous ( high set ) feature in the numeric relay .if the faultoccurs during the setting of relay ,the relay shall operate / trip for the previously selected /default settings.
Specification
Three phase , low-set, non - directional Over current relay with inverse definite minimum time (IDMT) or definite time characteristics
Three phase, high-set, non-directional Over current relay with instantaneous or definite time function
Low-set non -directional Earth fault Relay with inverse definite minimum time (IDMT) or definite time characteristics
Password protection
2 line 16 characters industrial grade LCD with back-lit module for numerical display of setting values and measured values which is user friendly
Enabling /Disabling o f High-Set
LED indications for power , pick-up, phase fault trip or Earth Fault trip f or IDMT and Highset
RS-485 communication port with modbus protocol
Relay test facility with relay trip & without relay trip
High Drop-off/Pick-up ratio
Consistent repeat accuracy
Poly carbonate front cover with external reset switch
...more
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