MMD Equipment 400S-6B1 - Manual (Page 26)

4. Operation
4-3
4.2.2 Three-phase circuit-breaker
In case overload and short-circuited wire
connection should occur, the circuit-breaker trips.
When this is tripped, stop the unit immediately
and reset the circuit breaker after getting rid of
the causes of trouble.
＜ How to reset＞
In order to reset the lever of circuit-breaker, press
hard the lever downward till the lever sounds
“click”.
4.2.3 Thermal relay
In case overload or short-circuit should occur to
load or load connection cable, this relay functions
to trip the circuit-breaker.
It is not necessary to push the reset button even
after the three phase main breaker is tripped
since the thermal relay is set automatic return at
factory.
A030403E
A080132
Reset button
A080053
Thermal relay