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to be protect the motor and electrical equipments.some circuit provide to protect the motor.for exm.DOL starter, OLR to protect the motors....
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoa relay that operates wen the voltage exceeds a particular set value is called over voltage relay
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What is the difference between an earth fault relay and an over current relay?
earth fault relay is also a type of over current relay but the set value of current or relay sensing current is much less than the maximum load current.in over current relay relay sensing current ise than maximum load current mor
Is a relay considered a load?
The relay's coil(s) would be a load, but the main function of a relay is to act as a switch to control power to a larger load.
What happens if you energize power to wire on n.c. contacts?
If the relay contacts are in series with a connected load, then the load will energize.
What device is the only load in the control circuit of a condensing unit?
I think that would have to be some relay or contactor coil for a fan, compressor or relay contacts.
How do you wire on delay timer?
The timer will have terminals associated with it. They may be on a relay socket that the relay plugs into. There will be two terminals used to bring the supply voltage to the relay timer. The load will be connected in series to either an open or closed set of contacts on the relay. The load voltage is controlled by the timer relay.The operation is, when the timer relay coil is energized the timing circuit in the relay is energized. This starts counting down until the time set point is reached and then the contacts either open or close depending on what set of contacts that you connected the load to.Some timer relays need to have the timer coil circuit de energized to reset the timing relay, others use a separate input voltage terminal on the relay to reset it without having to de energize the whole relay.
What is the difference between an earth fault relay and an over current relay?
earth fault relay is also a type of over current relay but the set value of current or relay sensing current is much less than the maximum load current.in over current relay relay sensing current ise than maximum load current mor
What is different thermal over load relay and thermally protected?
no difference
Is a relay considered a load?
The relay's coil(s) would be a load, but the main function of a relay is to act as a switch to control power to a larger load.
Over current relay?
in electrical circuit current will increase specific level (full load current).its call over current
How do you select overload relay for star delta starter?
according motor which we use suppose if it is 2.2kw then the range of OLR(over load relay) is 2-3.2
Is a relay defect and open load the same?
A relay is basically a controllable switch that connects a supply voltage to a load. If the relay is switch such that the load is not connected, that could be considered an open load. If it is switched the other way the load will be connected to its supply voltage. A defect in a relay would be something that caused it not to function correctly. It could be in the switch portion of the supply portion of the relay. Hence you are referring to different things and a defect may or may not cause the load to be open.
What is working principle of relay?
That a small amount of power can control a larger load, or can switch an entirely separate load.
What happens if you energize power to wire on n.c. contacts?
If the relay contacts are in series with a connected load, then the load will energize.
What is a over load relay?
they are designed to meet the special protective length of time it will take for a relay to come to an overload condition my answer is :OLR is a device which is used for protection according to the set range beyond the specified set range it will trip
What is thermal overload?
The load current is made to flow through the thermal overload relay, which is actually a bimetalic strip. Beyond a prespecified current the bimetalic strip tend to deflect due to heat (thermal effect) thus cutting off the circuit and hence it acts as an over load relay protection.
Where is the load reduction relay 2003 vw jetta?
under the dashboard..
What is the use of over voltage relay?
The use of over load relays in circuits is to protect the circuit against over heating .
