antipumping relay in CB

Oi! ali alfazani!

Shhhhhh! KEEP THE NOISE DOWN! Some of us are trying to get some sleep. <splutter, cough>

Basically when a circuit breaker is closed and then trips it cannot be reclosed until the initial close command has been removed, and then reapplied. This is the action of the antipump relay which is basically sealed in, blocking reclose until released.

The anti-pump feature is one of the features that prevents operators or automation from reclosing the circuit breaker before it has fully recharged the close springs.

The concept of an anti-pumping relay is well known for all types of electrically-activated devices, especially circuit breakers.

The anti-pumping relay allows the breaker to close only once for each press of the 'close' pushbutton (or rotation of the handle).

If a fault exists on the circuit before the breaker is closed, the breaker will close and immediately trip before the operator has a chance to release the close button (or handle). The anti-pumping relay prevents the still-active close signal from trying to reclose the breaker.

Many breakers are not rated for multiple successive reclose operations. If an anti-pumping relay is not used, the rapid close-open-close-open... series can result in destruction of the breaker and harm to the operator.

The anti pumping relay also cancels the persistent closing signal after successful completion of the closing operation.

The antipumping device is the word defined in IEC62271-100 for HV Switchgear & Control Gear. The definition at 3.6.128 directs to the vocabulary at IEV 441-16-48 where the device is defined as"a device which prevents reclosing after a close-open operation as long as the device initiating closing is maintained in the position for closing" The definition depicts the functioning of an Antipumping relay functions , defined as an "DEVICE" not as an Relay. Inventa Antipuming device hence is not a relay nor timer. The innovative concept was launched in 2004 after deep study of the switchgear functioning.