GE Grid Solutions
GE Information 994-0081-3.00-21
CT/PT Modules, Continued
Removing or
Replacing the
CT/PT
Transformers
CT input wiring must be shorted externally before servicing the CT
transformers
• Open circuiting a Feeder CT will result in feeder voltage being present at the
secondary of the CT.
• These Hazardous Voltages may result in equipment damage, shock, burns or
death
Note
Before accessing the transformers, you must remove the modules mounted
directly above.
Refer to the procedures on the previous page for removal/replacement of
those modules.
Background
Due to the stiffness of the wires on the primary of the standard 5 A CTs, the
transformers are manufactured with wires of two different lengths, to
facilitate easier assembly into the bottom of the D25 enclosure.
The part numbers are as follows:
• Standard short lead 5 A CT:
• Standard long lead 5 A CT:
450-0087
450-0088
The optional 42 X 5 A CTs are manufactured with both long and short
primary wires. The unused wire should be removed from the transformer
when installed.
• 42 X Overcurrent long/short lead 5 A CT:
450-0108
If replacement 5 A CTs are required, be sure to order the transformer with the
correct lead length.
Standard and 42 X overcurrent 1 A CTs, and all PTs, have leads flexible
enough that two types are not required.
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