Answer / amit kr jha

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

Answer / gopinathan

Anti-pumping function. After fault tripping or intentional
opening using the manual or electrical controls, the closing
order must first be discontinued, then reactivated to close the circuit breaker.
From Schneider Electric Catalogue

Answer / ravi kumar dontha

Simply say Anti pumping relay will bypass the closing coil
from DC input supply if we keep on giving input to the coil
through TNC switch for more than one cycle(1/50=20msec).

Answer / arati lahoti

When breaker is in closed condition at that time Anti-pumping prevents the reclosing of breaker. In short it does not allow to give again the closing command to breaker.

Answer / sethar

The Anti pumping relay is provided with closing circuit of
Circuit Breaker, which prevents the repetitive closing
Command to the breaker. Actually closing coils are not designed for continuous operations, if you give constant commands this coil may
burnt. So to prevent this antipumping contactors are used.

Therefore anti-pumping coil used to by pass the repetitive closing command.It is used to save the closing coil.

Answer / bibin jose

Anti-pumping device is a feature incorporated in a Circuit Breaker or reclosing scheme to prevent repeated operation where the closing impulse lasts longer than the sum of the relay and CB operating times. The function of an anti-pumping device is to prevent the circuit breaker closing and opening several times in quick succession. This might be caused by the application of a closing pulse while the circuit breaker is being tripped via the protection relays. Alternatively, it may occur if the circuit breaker is closed on to a fault and the closing pulse is longer than the sum of protection relay and circuit breaker operating times. Circuit breakers with trip free mechanisms do not require this feature.

Answer / veeresh k

It block the closing pulse when breaker is already closed condition

Answer / vipul

as we discussed earlier,anti puming relay avoids the
multiple clossing of the breaker,if we press the close
button while the breaker is already closed,anti puming
relay comes into action.ano contact of the anti pumping
relay is connected parallely to the close coil of the
breaker.if we go on pressing the close button, parallely
connected coil will energise not close coil

Answer / atul pradhan

In ckt bkr closing coils are not designed for continous
operations, if you give constant commands this coil may
burnt. so to prevent this antipumping contactors used in CC
ckt.

Answer / m_anwar

The contacts of this relay prevent uncontrolled discharging
of the closing spring, if the closing signal remains
complete up to the breaker. If the circuit remains
complete, the closing spring would discharge under the
wrong conditions, this is called pumping.

in pf lagging means current decrease by increasing voltage is correct or not ? reason ?

3 Answers  

how to calculate 3 phase clearance in Tower line , 33& 11 KV Line and LT Line.

1 Answers  

i am iti student i have project to do. that IS 100MW 220\33KV SUBSTATION I WANT TO KNOW HOW TO START, LIKE CALCULATION, WHAT RATING OF CT,CVT, PT, ISOLATOR LIGHTING ARRESTER WAVE TRAP CIRCUIT BREAKER IN 22OKV SIDE, ALSO TO WARDS 33KV SIDE PLS HELP ME WITH THIS, THIS MY LIFE NOW, I KNOW AUTOCAD, I LIKE TO KNOW HOW TO CALCULATE ALL THE THINGS

3 Answers  

What are objectives of energy managements ?

1 Answers   Kirloskar, RR,

which motor will u use in refinaries?

1 Answers   IOCL,

When distance between two pulleys is not fixed, the tension of belt is adjusted by a) driver shaft b) driven shaft c) adjustment screw d) belt

0 Answers   BMRCL,

What Is Connection APFC Panel In Compony.

0 Answers  

We have a distribution transformer of 750KVA/11kv/440v and an AVR (Servo Stabilizer) of 750KVA on the LT side of distribution transformer. Also we have an ACB of 1200A on the output of distribution transformer (that is on the input of AVR). We want to have an MCCB on the output of AVR. What should be the rating?

0 Answers   SSPL,

capacitor is load free component but why ampare meter shows the current when the capacitor bank breaker close?

4 Answers   OPS,

What is the difference between earth fault protection of motor feeder with CBCT and Without CBCT ?

0 Answers   Enmas, Michelin, Reliance,

how to select the cables based on amps ratings ? how to calculate the amps and how to select the cable size

1 Answers   JV Electricals,

when we should use Central Battery system and UPS system and why? in other words, what are the differences between the two systems?

1 Answers