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What is the difference between main contactor and axualiary contactor?
The load contactor is what the motor load is usually connected to. The auxiliary contacts are usually used in the stop start remote wiring to seal the mag in. Auxiliary contacts are also used to transmit the status of the contactor to a PLC.
How is a Blowout coil connected?
A blowout coil connected in series with contactor's auxiliary contacts that shunt around the main contactor contacts. The coil is out of the circuit when the main contactor contacts are closed and in the circuit when the main contactor contacts are open.
What is the use of check zone in bus bar protection?
It provides stability in case of problems with disconnectors auxiliary contacts (stuck contacts or wiring problems). Ir relies on the feeder currents in the busbar. Disconnectors positions are not required. There is no selectivity using check zone. It's usefully because it prevents external faults to be considered as a busbar fault.
What is the purpose of a contactor and a relay?
to protect or to calculate the operating conditions of an electrical system and to camand circuitbreaker to trip in any fault detection.relay is the one which detects the abnormal condition of the circuit and signals the circuit breaker to trip(open).....
Auxiliary steam stop valve?
It is a stop valve placed on an auxiliary piece of equipment. Or it could be placed at the steam main to feed an auxiliary steam system (heating, auxiliary pumping. etc.). It is not the Main steam stop for the boiler or the prime mover (engine, turbine, process), it is for a secondary service.
How the auxiliary contacts of the reversing circuit works?
Normally open contacts close and normally closed contacts open.
How do you wire auxiliary contacts on Allen Bradley starters?
call an electrician
What is the difference between main contactor and axualiary contactor?
The load contactor is what the motor load is usually connected to. The auxiliary contacts are usually used in the stop start remote wiring to seal the mag in. Auxiliary contacts are also used to transmit the status of the contactor to a PLC.
What are the parts of magnetic contactor?
There are three main parts of a magnetic contactor. These include the power contacts, contact springs, and the auxiliary contacts.
How does an ice cube relay work?
The relay is used to "interlock" a circuit. It consists of a coil and a number of auxiliary "normally open" or "normally closed" contacts. A limiting condition is wired through the coil contacts and resulting conditions are wired through the auxiliary contacts. When the limiting condition is met, the coil will pull in and change the state of the auxiliary contacts. For example, if you want a lamp (lamp 1) to turn off when a second lamp (lamp 2) is turned on, lamp 1 would be wired through a "normally closed" set of contacts and lamp 2 would be wired through the coil contacts. When lamp 2 is turned on, the coil will pull in and open the "normally closed" contact for lamp 1, turning it off.
A motor starter will have a set of auxiliary contacts which is used to provide a?
Feedback to a control circuit that the motor starter has closed or opened its contacts as commanded.
How do you wire a relay to a motor contactor?
One way is to use the auxiliary contacts on the motor contactor to close a separate source supply to drive an auxiliary relay.
How is a Blowout coil connected?
A blowout coil connected in series with contactor's auxiliary contacts that shunt around the main contactor contacts. The coil is out of the circuit when the main contactor contacts are closed and in the circuit when the main contactor contacts are open.
What is a magnetic contactor protection device?
Contactors have both power and auxiliary contacts. We use the auxiliary contact to control magnetic system of contactor. When a heater , relay or a key warn the contactor it is energized and by the typical magnetic interaction it opens its closed power contacts.
What is the function of auxiliary relay in power station protection?
Auxiliary relay is a relay which will repeat the operations of protective relay such as tripping, time lag, breaking of trip circuit current, giving alarms and showing flags etc..Protective relay contacts are delicate and light weight hence it will not capable of carrying a large amount of current for a long period.protective relays do not have enough contacts to perform all the operations of protective scheme.Therefore auxiliary relays, auxiliary switches and repeat contacts are used to assist protective relays.
How does a normally closed contact work?
De-energize it and note the position of the contacts.
How does an auxiliary contact work?
The auxiliary contact is to be utilized for interlocking of another relay or contactor or indication signal from another equipment.
