control outputs in the description of the BTB close/open output. 
There are also other outputs availabe for BTB control:  
  BTB close/open 
  BTB ON coil 
  BTB UV coil 
 
This output is intended for opening of the BTB using an undervoltage coil if a 
circuit breaker is used as BTB.  
  The output is closed while mains values are within limits. BTB closing 
command is blocked for 1 sec after the UV coil has been closed to allow 
the breaker mechanical system getting ready for closing.  
  The output is opened for 2 sec when the BTB has to open. If 
synchronizing is disabled with the particular breaker, the length of the 
inverse pulse is extended to 5sec.  
 
 
BTB UV COIL OUTPUT TIMING 
 
There are also other outputs availabe for GCB control:  
  BTB close/open 
  BTB ON coil 
  BTB OFF coil