ABB CO Instruction Leaflet page 28

I.L 40-100J
Figure 17. External Schematic of HiLo CO Relay for Phase and Ground Overcurrent
Figure 18. External Schematic of HiLo CO Relay with ACS Unit for Phase and Ground
28
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DEVICE NUMBER CHART
51 - OVERCURRENT RELAY, TYPE CO
51-N - GROUND OVERCURRENT TELAY, TYPE CO
52 - POWER CIRCUIT BREAKER
52A - BREAKER AUXILIARY CONTACT
ICS - INDICATING CONTACTOR SWITCH
TC - BREAKER TRIP COIL
Protection on a Three Phase System
Protection on a Three Phase System
NEG.
OR
POS.
ICS
ICS
NEG.
OR
POS.
Sub 3
182A755
Sub 1
3527A93