Ct/Pt Modules - GE D25 User Manual

D25
User's Manual

CT/PT Modules

CT/PT The CT and PT interface modules are field replaceable.
Interface
Each of the maximum five modules holds three CTs or PTs, for a total of
Modules
fifteen 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.
Use Pullers
• These Hazardous Voltages may result in equipment damage, shock, burns or
death
Procedure: Steps to remove the CT and/or PT interface modules
Removal
Step
1
2
3
Procedure: Steps to replace the CT and/or PT interface modules.
Replacement
Note: The use of 42x nominal CT modules requires that you enter calibration
factors in the D25's configuration. See: 42x Nominal CT Module
Step
1
2
3
134
Unplug the transformer connectors to disconnect the secondaries
from the module.
Remove the module by sliding it toward the front of the open D25,
then lifting it from the Snap-On PEM studs.
Move it forward and out the front of the open D25.
Move the card into position and lower it onto the Snap-On PEM
studs.
Push it into the D25 until the card snaps firmly in place on the
PEM studs.
Plug the transformer secondaries into connectors, observing proper
orientation and arrangement. Transformer secondary wires should
not cross each other.
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