THREE PHASE OVER CURRENT + EARTH FAULT RELAY WITH HIGHSET TYPE MC61A WITH (2NO+2NC)

50 / 51, 50N/ 51N –

1. Three Phase Over current
2. Earth Fault
3. Highset Over current
4. Higset earth fault
5. Inverse & Definite time trip Characteristics
6. 4 digit display
7. CT secondary 1A / 5a field selectable

TECHNICAL SPECIFICATIONS:-
1.0 Rated Current In 1A or 5A (Field selectable)
2.0 Rated Frequency 50Hz ± 2.5 Hz
3.0 Auxiliary Power Supply 24V to 110V AC/DC ± 15% or 95V to 240V AC/DC ± 15%
4.0 Relay Settings:
Over Current (Is) :- 0.2 to 2.0 times In, in steps of 0.05In
High set Over Current (Ihs) :- 0.2 to 40 times In, in steps of 0.2 In or Disable
Earth Fault (Os) :- 0.05 to 0.8 times On in steps of 0.05 On
High set Earth fault (Ohs) :- 0.1 to 20 times On in steps of 0.1 On or Disable
Time Multiplier :- 0.1 to 1.6 in steps of 0.05 (independent settings for O/C & E/F modes)

This THREE PHASE OVER CURRENT + EARTH FAULT RELAY WITH HIGHSET TYPE MC61A BLOCK is easily insert in your schematic diagram and connect as you like way.

The relay has built in highest (instantaneous trip) protection, for both over current & earth fault elements. The relay can be used for feeder protection in all low voltage, medium voltage and high voltage sub-stations. The relay has a front panel 4 digit seven segment LED display to read various settings, on line values, switch on values, last trip data etc. User has a choice of 7 trip time characteristics.