Prok dv's make PNA TYPE IDMT/DEFINITE TIME/INSTANTANEOUS LOW-SET/HIGH-SET NONDIRECTIONAL
NUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCR) WITH
EARTH 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 may
have isolated or resistance impedance earthed or solidly earthed neutral points. Definite
time over current relays are both suited for isolated systems and for use as back up to
differential relays and distance relays. Inverse time relays (over current relays with various
inverse times - current characteristics) are advantageous for interconnected systems and
solidly grounded systems. Another tool for reducing the tripping time for faults near the
source is to use the added instantaneous ( high set ) feature in the numeric relay .if the fault
occurs during the setting of relay ,the relay shall operate / trip for the previously selected /
default settings.

• 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

Prok dv's make PNA TYPE IDMT/DEFINITE TIME/INSTANTANEOUS LOW-SET/HIGH-SET NONDIRECTIONAL
NUMERICAL/MICROPROCESSOR BASED OVER CURRENT RELAY (OCR) WITH
EARTH 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 may
have isolated or resistance impedance earthed or solidly earthed neutral points. Definite
time over current relays are both suited for isolated systems and for use as back up to
differential relays and distance relays. Inverse time relays (over current relays with various
inverse times - current characteristics) are advantageous for interconnected systems and
solidly grounded systems. Another tool for reducing the tripping time for faults near the
source is to use the added instantaneous ( high set ) feature in the numeric relay .if the fault
occurs during the setting of relay ,the relay shall operate / trip for the previously selected /
default settings.

• 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