Installation and use of DAB7 MCB circuit breaker accessories
1. This series of circuit breaker accessories are specially designed for use in conjnction with DAB7 (63 frame) circuit breakers and are not intended to be used alone.

The circuit breaker has the following accessories
Circuit breaker + auxiliary contact; circuit breaker + auxiliary alarm contact; circuit breaker +shunt trip;
circuit breaker + shunt trip + auxiliary contact; circuit breaker + shunt trip + auxiliary alarm contact; circuit breaker + undervoltage trip.

2. The four accessories are installed on the left side of DAB7-63 miniature circuit breakers, the DAB7-OF, DAB7-FB, DAB7-QY are fixed with screws, the DAB7-FL is fixed to both sides with tape, and at the same time can be installed with the guide rail.

3. The mechanical connection between the circuit breaker and DAB7-, DAB7- FB, DAB7- FL, DAB7-QY transmission shaft should be flexible and compatible with the rest of the equipment.

4. After DAB7-QY circuit breaker has been installed, it can only be closed when press the test button. And installer should shut off the circuit breaker and release the test button immediately, thus ensure the installation safely and correctly. Besides, the rated voltage should pass through the undervoltage trip at same time.

Auxiliary alarm contact
It has two sets of transfer contacts. Both groups are auxiliary contacts when the yellow indicator is 'off' state. The left side is the auxiliary contact and the right is the alarm contact when the yellow indicator is 'open' state.

Shunt trip
The rated voltage of control power is AC50Hz 24V-110V, and the trip will activate the circuit breaker when the actual power voltage is between 70%US-110%US.

Undervoltage trip
The rated voltage is 230V and 400V respectively. The release will break the circuit breaker when the actual voltage is between 70%Ue-35%Ue; the release will prevent the circuit breaker from closing when the actual voltage is below 35%Ue; the release will close the circuit breaker when the actual voltage is between 85%Ue-110%Ue.