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How to wire Current Transformers (CT) on Sepam Series 80 relay for differential protection (ANSI 87)

Issue
Need to know how to wire CTs for differential protection (ANSI 87) on the Sepam Series 80 relay and what type of current values it generates.

Enviroment
Sepam 80 Series

Resolution

Wiring Current CTs for Differential Protection (ANSI 87)

Feeder

Feeder Feeder2

For feeder applications:

    • CTs located on primary side of transformer or motor are wired to B1 using a CCA634 connector and produce a Ia, Ib & Ic current.
    • CTs located on secondary side of transformer or motor are wired to B2 using a CCA634 connector and produce a I'a, I'b & I'c current.
Main

MainMain2

For Main applications:

    • CTs located on primary side of transformer or generator are wired to B2 using a CCA634 connector and produce a I'a, I'b & I'c current.
    • CTs located on secondary side of transformer or generator are wired to B1 using a CCA634 connector and produce a Ia, Ib & Ic current.

Schneider Electric Turkey

How to wire Current Transformers (CT) on Sepam Series 80 relay for differential protection (ANSI 87)

Issue
Need to know how to wire CTs for differential protection (ANSI 87) on the Sepam Series 80 relay and what type of current values it generates.

Enviroment
Sepam 80 Series

Resolution

Wiring Current CTs for Differential Protection (ANSI 87)

Feeder

Feeder   Feeder2

For feeder applications:

    • CTs located on primary side of transformer or motor are wired to B1 using a CCA634 connector and produce a Ia, Ib & Ic current.
    • CTs located on secondary side of transformer or motor are wired to B2 using a CCA634 connector and produce a I'a, I'b & I'c current.
Main

MainMain2

For Main applications:

    • CTs located on primary side of transformer or generator are wired to B2 using a CCA634 connector and produce a I'a, I'b & I'c current.
    • CTs located on secondary side of transformer or generator are wired to B1 using a CCA634 connector and produce a Ia, Ib & Ic current.

Schneider Electric Turkey

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