Protection Transformer Wiring Diagram. It can be seen from the ct connection for transformer differential protection that wye connected cts are used in the delta side of the transformer while cts on the wye side of the transformer is dab connected. How to overcurrent protect 600 volt class transformers and associated wiring per nec 450 3b and nec 240 3.
General current protection current transformers p. Refer to the table at the right to determine the resistance in ohms or va of the wires that connect the. The varnish used exceeds csa c222 no.
Multi ratio current transformer with an intermediate tapping on primary winding.
Wiring diagrams do not show the. It can be seen from the ct connection for transformer differential protection that wye connected cts are used in the delta side of the transformer while cts on the wye side of the transformer is dab connected. There are different alternatives for obtaining the restraining current irt. 5 characterisation of cts p.