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5. Safety Devices
5.1
Disconnecting the Power Supply
The main circuit breaker is located on the right rear side of the supply unit. It is used to de-
energize the complete system using a single switch (Figure 9).
The main circuit breaker functions as a switch and as an overcurrent fuse.
The main circuit breaker is not to be used as the regular on/off switch for the system.
The supply unit must be set up so that the main circuit breaker is freely accessible at all
times.
Figure 9: Supply unit with main circuit breaker