D25User's Manual GE Grid Solutions134 994-0081-3.00-21 GE InformationCT/PT ModulesCT/PTInterfaceModulesThe CT and PT interface modules are field replaceable.Each of the maximum five modules holds three CTs or PTs, for a total offifteen transformers.!Use PullersCT input wiring must be shorted externally before servicing the CTtransformers• Open circuiting a Feeder CT will result in feeder voltage being present at thesecondary of the CT.• These Hazardous Voltages may result in equipment damage, shock, burns ordeathProcedure:RemovalSteps to remove the CT and/or PT interface modulesStep Action1 Unplug the transformer connectors to disconnect the secondariesfrom the module.2 Remove the module by sliding it toward the front of the open D25,then lifting it from the Snap-On PEM studs.3 Move it forward and out the front of the open D25.Procedure:ReplacementSteps to replace the CT and/or PT interface modules.Note: The use of 42x nominal CT modules requires that you enter calibrationfactors in the D25’s configuration. See: 42x Nominal CT ModuleStep Action1 Move the card into position and lower it onto the Snap-On PEMstuds.2 Push it into the D25 until the card snaps firmly in place on thePEM studs.3 Plug the transformer secondaries into connectors, observing properorientation and arrangement. Transformer secondary wires shouldnot cross each other.
