Chapter 2 - Safety Information    P50 Agile P153 
 
 
 
Caution: 
Check integrity of the PCT connection. 
 
Caution: 
Check voltage and current rating of external wiring, ensuring it is 
appropriate for the application. 
 
3.7  PERIPHERAL CIRCUITRY 
 
 
Warning: 
Do not open the secondary circuit of a live CT since the high voltage 
produced may be lethal to personnel and could damage insulation. Short 
the secondary of the line CT before opening any connections to it. 
Note: 
For most General Electric equipment with ring-terminal connections, the threaded terminal block for current transformer 
termination is automatically shorted if the module is removed.  Therefore external shorting of the CTs may not be 
required. Check the equipment documentation and wiring diagrams first to see if this applies. 
 
Caution: 
Where external components such as resistors or voltage dependent 
resistors (VDRs) are used, these may present a risk of electric shock or 
burns if touched. 
 
Warning: 
Take extreme care when using external test blocks and test plugs such as 
the MMLG, MMLB and    P990, as hazardous voltages may be exposed. 
Ensure that CT shorting links are in place before removing test plugs, to 
avoid potentially lethal voltages.