E-26
11. OCR alarm (AL) [MRE: Manual reset type]
AL is standard equipment on the circuit breaker with ETR.
When the circuit breaker trips with the LTD, STD, INST, or GF pickup current, the manual reset button protrudes
and AL is output continuously.
In this case, to reset the circuit breaker, press the manual reset button on the front of the circuit breaker until
the button clicks.
CAUTION
Remove trip causes before turning on the circuit breaker. Failure to do so may result in an electric shock
or fire.
The following table lists the electrical capacity of AL. The following figure shows the internal wiring diagram.
Voltage (V)
Current (A)
Resistive load
Inductive load
AC
(50/60 Hz)
240
3
2
125
5
3
DC
240
0.2
0.2
125
0.4
0.4
30
4
3
Switch rating
98
OCR alarm switch
97
(Note 1) Using the power supply part with the contact output, which requires a control power supply, enables
the contact output for each cause of overcurrent trip. This is the same function as AL.
(For more details of the function, refer to the section 16.3 (page 32).)
(Note 2) AL is not output when OFF operation (SHT operation, UVT operation, or OFF button pressing) is performed.
Manual reset button
CAUTION
Tripping state (protruding)
Reset state (not protruding)
Even if the circuit breaker is turned on while
the manual reset button protrudes, the ON
operation is not performed.
Press the protruding manual reset button
until it clicks to reset the circuit breaker.
AL can be released and the circuit breaker
can be turned on.
