Hobby 600 & 750 Circuit Breakers

[David Lawson]

The majority of early 600s and 750s have what are known as Thermal Magnetic Miniature Circuit Breakers within the control panel above the habitation door.
The purpose of the circuit breakers are to monitor the individual circuits for an overload condition, much like a fuse.
In the event of an overload or short circuit condition the circuit breaker will ‘trip’ much the same as in a domestic situation but rather than the toggle tripping to the off state, normally down in a domestic situation, the circuit breakers in the Hobby control panel ‘pop out’ as shown in the images below.
The left hand image is normal state, the right hand image is tripped state.
If a circuit breaker is tripped because of an overload condition, then it should simply be a matter of resetting the toggle by pressing it back in, obviously after trying to identify the cause of the overload.
The images also show what the circuit breaker looks like behind the control panel and as can be seen they are a simple push fit but not so easy to remove for complete replacement because of the sprung lugs behind the facia.

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