User guide
TS 870 TRANSFER SWITCH 
PM062 REV 5 08/05/05  29  Thomson Technology 
The  interconnected  system  shall  be  evaluated  to  ensure  compliance  with  the  appropriate 
schematic drawings. The proper location of sensors and power cabling shall be determined. 
The grounding points of the system shall be verified to determine that ground paths do not 
exist that would bypass the sensors.  The use of high-voltage testers and resistance bridges 
may be required.  A simulated fault current is to be generated by a coil around the sensors. 
The  reaction  of  the  circuit-interrupting  device is  to  be  observed for  correct  response.    The 
results of the test are to be recorded on the test form provided. 










