what is the function of anti-pumping in circuit breaker?
Answer Posted / mohamed elias
The anti-pumping relay is a device in circuit-breaker whose
function is to prevent multiple breaker closures. For
instance, if the operator gives the closing command to the
breaker by pressing the close button and the breaker
closes. However, a fault in the system causes the breaker
to trip. Since the close command is still in the pressed
condition, there is a chance of the breaker closing again
and being tripped by the relay multiple times. This can
damage the closing mechanism of the breaker. The anti-
pumping relay prevents this by ensuring that the breaker
closes only once for one close command from the control
panel.
Is This Answer Correct ? | 14 Yes | 2 No |
Post New Answer View All Answers
bsnl tta exam question
i want to put single phase load on scott connected transformer,eventhough how to balance the transformer.
Why does inductive loads consume KVARs?
why we cannot protect 100% winding of an alternator by using differential protection?
What is meant by Load Encroachment in OHL Feeder Protection?
why impedance relay is used for medium transmission line protection
how can maintain the power factor and why and this is how do work tell us
How to protect sensitive loads such as Dosing pumps inside a factory from voltage surge/voltage fluctuation.
what is negative d.c. voltage, why this voltage is used in base transciever station.
my b-tech percentage is 50%. what answer will satisfy the hr ?
Why power genaration in India is at 50HZ while America its 60HZ
What is knee point voltage of transformer?
Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.
hello friends.. I have a doubt regarding the operation of dc machines.. I studied in a text book that a dc machine can be used as a generator and as a motor.. is this possible? If so,please send me the info about this topic.. you can also send your info to my mail.
how does directional relay work incase of ac ?