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Electrical Power Engineering

POWER CIRCUIT BREAKERDL 2108T02

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DL 2108T02

ver b20130115 3

3. PUSH-BUTTON CONTROL

The PLC and RELAY control inputs must be low (short - circuit).

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DL 2108T02

ver b20130115 4

When the module is supplied with the auxiliary voltage, the power breaker K is normally open.

Pressing the push-button S on the RS flip-flop is set and the power breaker K is closed.

At SIGNAL OUTPUT terminals is present a high level, TTL compatible.

Pressing the push-button S off the RS flip-flop is reset and the power breaker driving is inhibited.

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DL 2108T02

ver b20130115 5

4. RELAY CONTROL

The PLC control input must be low (short-circuit).

The RELAY control input is connected to a switching contact, normally closed.

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DL 2108T02

ver b20130115 6

When the module is supplied with the auxiliary voltage, the power breaker K is normally open.

With closed RELAY contact, pressing the push-button S on the RS flip-flop is set and the power breaker K is closed.

When the RELAY contact is open the RS flip-flop is reset and the power breaker driving is

inhibited.

Only when the RELAY contact is closed again it is possible to drive the power breaker K by meansof the push-button S on.

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DL 2108T02

ver b20130115 7

5. PLC CONTROL

The RELAY control input must be low (short-circuit).

The PLC control input is connected to a switching contact, normally closed.

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DL 2108T02

ver b20130115 8

When the module is supplied with the auxiliary voltage the power breaker K is normally open.

With closed PLC contact, pressing the push-button S on the RS flip-flop is set and the power breaker K is closed.

When the PLC contact is open the drive coil of the power breaker is inhibited and the power contactK is open. The RS flip-flop remains in set state and when the PLC contact is closed again the power

breaker K is closed.

Only pressing the push-button S off the RS flip-flop is reset and the power breaker driving isinhibited.

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