Siemens SENTRON 3VL160X System Manual page 72

Application planning
5.9 Use in transfer control system
Structure of the transfer control system
● Infeeds line 1 (main system) and line 2 (standby system) are connected to the ATC5300.
● In case of system disturbances, the ATC5300 activates the 3VL molded case circuit
breakers Q1 and Q2 accordingly
● The 3VL molded case circuit breakers must be equipped with the following accessories:
– One motorized operating mechanism per molded case circuit breaker
– One alarm switch per molded case circuit breaker
– Two auxiliary switches 1NO/1NC per molded case circuit breaker
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3VL IEC molded case circuit breakers
System Manual, 11/2013, 110 0110 - 02 DS 03