Ac Current Transformer Inputs - GE GEK-106273L Instruction Manual

Each AC current input has an isolating transformer and an automatic mechanism that shorts the input when the
module is withdrawn from the chassis. There are no internal ground connections on the current inputs. Current
transformers with 1 A or 5 A rated secondary current may be used.
CAUTION: VERIFY THAT YOUR RELAY MODEL CORRESPONDS TO YOUR RATED SECONDARY CURRENT.
UNMATCHED CTS MAY RESULT IN EQUIPMENT CMAGE OR INADEQUETE PROTECTION.
The exact placement of a zero sequence CT, so that ground fault current will be detected, is shown below. Twisted
pair cabling on the zero sequence CT is recommended.
Figure 3-6 ZERO SEQUENCE CORE BALANCE CT INSTALLATION
GEK-106273L
PRODUCT DESCRIPTION
3.2.3.
UNSHIELDED CABLE
GROUND CONNECTION TO NEUTRAL
MUST BE ON SOURCE SIDE.
SOURCE
LOAD
SHIELDED CABLE
SOURCE
GROUND CONNECTION
MUST BE ON LOAD SIDE
LOAD
MIF Digital Feeder Protection

AC CURRENT TRANSFORMER INPUTS

GROUND
OUTSIDE CT
STRESS CONE
SHIELDS
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