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
• Modular Integrated Draw Out System for field adaptability and tropicalised design (MIDOS)
• Password protection
• LED indications for power , pick-up, phase fault trip or Earth Fault trip f or IDMT and Highset
• Separate heavy duly output contacts provided f or time delayed phase fault with high-set and time delayed Earth Fault with high-set

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
• Modular Integrated Draw Out System for field adaptability and tropicalised design (MIDOS)
• Password protection
• LED indications for power , pick-up, phase fault trip or Earth Fault trip f or IDMT and Highset
• Separate heavy duly output contacts provided f or time delayed phase fault with high-set and time delayed Earth Fault with high-set