Type CO Overcurrent Relay Instruction Leaflet
2.0 CONSTRUCTION AND OPERATION The type CO relays consist of an overcurrent unit (CO), an indicating contactor switch (ICS), and an in-dicating instantaneous trip unit (IIT) when required. The principal component parts of the relay and their location are shown in Figures 1 through 5. 2.1 ELECTROMAGNET The electromagnets for the types CO-5, CO-6,
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