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5.6 Current Transformers Basics
1. Ensure CTs meet the following criteria by referring to label on CT:
• 600 VAC UL rated
• UL2808 listed
• 1/3 (333 mV) output voltage
• Appropriate range for the circuits (5-120%) of CT rating recommended
2. Ensure CTs are oriented and placed properly.
• Arrow points toward load (or as instructed by CT label).
• Arrow points away from panel (or as instructed by CT label).
• Place on rst conductor of voltage reference. L1-L2 circuits are placed on L1.
• Observe wiring color and polarity.
• Use the shield wire, if provided. (Connect to PCB terminal marked S.)
Current Transformers Basics
White: Positive
Black: Negative
(No Shield)
RǀCoil CTs
White: Positive
Brown: Negative
Bare Wire: Shield
5 METER INSTALLATION
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