Frequently asked questions
What is the operation of the GVAD fault signalling contacts of the GV2 & GV3 motor protection circuit breakers?
FA23920
27 June 2022
GV2ME, GV2P, GV2L, GV2LE, GV3P and GV3L motor protection circuit breakers (MPCB) can be fitted with the following fault indicating contact blocks:
GVAD0110
GVAD0101
GVAD1010
GVAD1001
These blocks comprise of fault signalling contacts and instantaneous auxiliary contacts.
GVAD0110
A N/C fault signalling contact (terminals 95-96), closed if there is no fault, open when a fault (magnetic or thermal) occurs.
A N/O instantaneous auxiliary contact (terminals 53-54), closed when the device is energised and open when the device is de-energised.
GVAD0101
A N/C fault signalling contact (terminals 95-96), closed if there is no fault, open when a fault (magnetic or thermal) occurs.
A N/C instantaneous auxiliary contact (terminals 51-52), closed when the device is de-energised and open when the device is energised.
GVAD1010
A N/O fault signalling contact (terminals 97-98), open if there is no fault, closed when a fault (magnetic or thermal) occurs.
A N/O instantaneous auxiliary contact (terminals 53-54), closed when the device is energised and open when the device is de-energised.
GVAD1001
A N/O fault signalling contact (terminals 97-98), open if there is no fault, closed when a fault (magnetic or thermal) occurs.
A N/C instantaneous auxiliary contact (terminals 51-52), closed when the device is de-energised and open when the device is energised.
The instantaneous auxiliary contact test is performed by creating a state of transition of the handle actuator between the de-energised position and the energised position.
The fault contact test is performed by pressing the test button when the handle actuator is in the closed position.