External Ct Usage-eocr

Instruction : External Current Transformer

Installation of Ext CT

Product Name: EOCR-E Series Electronic Over Current Relay Multi-function digital Relay

 External CT Option The current higher than 60Amps can be applied with the External CT Option. The Ext CTs should be selected in 5A of the secondary current rating of a External CT .  Rating Current Reference

Current Setting Range(A)

Current Ratio of Ext. CT

H1 HH H2 H3 H4

10 ~ 120 15 ~ 180 20 ~ 240 30 ~ 360 40 ~ 480

100 : 5 150 : 5 200 : 5 300 : 5 400 : 5

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 Figures Rack mounting type - This model is provided with assembled one in the factory. - with 3 CT.

- This model is provided with assembled one in the factory. - with 3 SR-CT

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SWP-040-02, Form 13, rev. 0, 1999.5.17

Instruction : External Current Transformer

Installation of Ext CT

Product Name: EOCR-E Series Electronic Over Current Relay Multi-function digital Relay

Flush mounting window type - This model is provided with assembled one in the factory.

- D–Sub connector is assembled.

Flush mounting terminal type - This picture shows an example of the assembled EOCR with a External CT.

- This picture shows an example of the

assembled EOCR with a External CT. This terminal type without terminals can be provided by a special order.

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SWP-040-02, Form 13, rev. 0, 1999.5.17

Instruction : External Current Transformer

Installation of Ext CT

Product Name: EOCR-E Series Electronic Over Current Relay Multi-function digital Relay

 Setting - CT ratio should be set in a primary current rating of the External CT. - It’s not possible to set the CT ratio in case “oc” setting value is over 6.0A . - It’s not possible to adjust or change the value during operation. - In case CT ratio is over 75:5, the indication on the screen shows c100, c200...c400..c800. - Setting mode.

- Setting value. Off(--), 5t, 2t, 10, 15, 20, 25, 30, 40, 50, 60, 75, 100, 120, 150, 200, 250, 300, 400, 500, 600, 750, 800.

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SWP-040-02, Form 13, rev. 0, 1999.5.17