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2.9 Tripping Output
Figure 2.9.1 shows the tripping logic. Each protection can output five tripping signals to enable
tripping for five breakers. The tripping signals are set according to the number of breakers to be
tripped and drive the heavy duty, high-speed tripping output relays TRIP-1 to TRIP-5.
Note: Models 203 and 204 are not provided with TRIP-4 and TRIP-5.
When the scheme switch [L/O] is set to “ON”, tripping signals can be locked and reset with the
〔RESET〕key on the front panel. When the switch is set to “OFF”, they are reset automatically
after clearing the fault.
The tripping output relays reset 200ms after the tripping signal disappears. When [L/O] is set to
“OFF”, the tripping circuit must be opened with the auxiliary contact of the breaker prior to reset
of the tripping relay to prevent the tripping relay from directly interrupting the tripping current of
the breaker.