How Does an A/C Contactor Work?
Now that we know it's a switch, the question becomes, "How does air conditioning contactor get turned on?"
While light switches need you to physically flip the switch and pressure switches use air to operate, your contactor is triggered by a solenoid pulling on a small plunger (the button).
Once contact is made on both sides of the contactor, power can then pass on to the motor and compressor and provide you cool air.
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Timer Relays
A timer relay is a combination of an electromechanical output relay and a control circuit. The contacts will open or close before or after a pre-selected, timed interval.
Time delay relays are initiated or triggered by one of two methods:
Application of input voltage/auxiliary supply will either initiate the unit or make it ready to initiate when a trigger signal is applied.
Applying a trigger signal is used to initiate the unit after input voltage has been applied. This trigger signal can either be a control switch (dry contact switch) or a power trigger (voltage).
What is Comb Busbar?
Comb busbar is one of the most basic switch gear instruments. The main purpose of a comb busbar is to distribute power to switch gear components such as MCBs. There are two types of comp busbar viz, single phase comp busbar and three phase comb busbar. It can be found in small distribution boards that you can find at you home. Single phase comb busbar is used in single phase power distributions and three phase comb busbar is used in three phase power distribution systems. Two lead comb busbar are also available and are used in DC system.