New Method for OC Relay Coordination

Table 2

Relays operation time for feeders 1 and 6 fault, with traditional method.

Relay	TMS	Bus section CB OFF	Bus section CB ON
		Operation time t (sec) for F1 fault	Operation time t (sec) for F6 fault
F1 R	0.05	0.113	∞
F6 R	0.05	∞	0.113
BS R	0.14	∞	0.317
INC1 R	0.23	0.521	0.521