can anybody tell what is antipumping relay and wher it is used?

Answer 1

The earlier answer only gave a part of the picture from some Siemens literature.

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

Its logic systems equivalent is a 'one-shot' device.

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

You see, 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.

Answer 2

The anti-pumping circuit in the Electronic Charging Motor Controller (ECMC) of the Siemens Electric Motor Operator is to prevent a maintained close signal from repeated attempts to re-close the breaker after a fault. Without the anti-pump feature, as soon as the breaker tripped the motor operator would re-close the breaker, the breaker would immediately trip again and the cycle of tripping and re-closing would continue until the breaker was destroyed.

Answer 3

An example of relay. Infact I do not know about it.