external ct usage-eocr

Instruction : External Current Transformer

Installation of Ext CT Product Name: EOCR-E SeriesElectronic 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 10 ~ 120 100 : 5

HH 15 ~ 180 150 : 5

H2 20 ~ 240 200 : 5

H3 30 ~ 360 300 : 5

H4 40 ~ 480 400 : 5▼ ▼ ▼

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

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

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Instruction : External Current Transformer

Installation of Ext CT Product Name: EOCR-E SeriesElectronic 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.

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

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Instruction : External Current Transformer

Installation of Ext CT Product Name: EOCR-E SeriesElectronic 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.

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

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