Anti-Pumping Relay

Anti-Pumping Relay

• 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.
• The anti pumping device is used to avoid continuously energizing the breaker closing coil once the CB has already closed. this is done to avoid burning the coil