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to control a high-current circuit with a low-current signal for example a starter on a car uses a very high current (not voltage) and needs thick cable to provide it.
it would be impractical to run this thick cable up to the ignition key so a lower current from the starter key operates a switch, usually electro magnet, which in turn completes a circuit for the higher current.
What else can I help you with?
What are the different types of relays used in substation?
kinds of electrical relays
What are alarm relays?
relays which operate by signalling alarms notifying the type of the fault
What type of protection is used on power transformers?
Depending on the size of the transformer, it can be protected by fuses, thermal elements, or by a full relay protection package, which could include overcurrent relays, differential relays, and distance relays.
Which types of relay is use in power transformer?
A 'power transformer' is a category of transformer used within electricity transmission and primary distribution systems. Relays are widely used with power transformers to provide various types of protection that will act to disconnect the transformer in the event of a fault. Examples of these relays include Buchholz relays, earth-fault relays, and differential relays. Relays are also used to operate a power transformer's automatic tap-changing mechanism in order to compensate for changes in load.
What are current relays?
Current relays are the relay which sens the current passing in particular circuit and operates when this current exceed its set value.
How many types of relays?
relays are two type 1. Electromagnetic attraction relays. 2. Electromagnetic induction relays.
Where are the relays on a citreon xsara?
looking for relays in citreon xzara
Are relays unidirectional or bidirectional devices?
Relays are bidirectional devices.
When was Kansas Relays created?
Kansas Relays was created in 1923.
What are the different types of relays used in substation?
kinds of electrical relays
How do you run tandem relays in baseball?
There is no such thing as "tandem relays" in baseball.
How do you find the relays for the cooling fan on the radiator?
relays will be found on inerfenders or firewall
How many cooling fan relays does an 02 Buick rendezvous have?
3 relays
When was Mount SAC Relays created?
Mt. SAC Relays was created in 1959.
What are alarm relays?
relays which operate by signalling alarms notifying the type of the fault
Where is located Ford Expedition 1999 relays?
where is located ford expedition 1999 relays
What is Safety relay?
Relays with Forcibly Guided Contacts Relays with Forcibly Guided Contacts
