Interested to Buy Any Domain ? << Click Here >> for more details...
What is the difference between Relay and Contactor
- 35 Answers
- 158078 Views
- Siemens, I also Faced
- E-Mail Answers
Answer Posted / sandeep
Contactor is a switching device. Unless & until you give
command it wont operate. Contactor is not a sensing device.
on the other hand Relay is the device which sense the
ubnormality & give command accordingly. Relay differentiate
normal & ubnormal condition which contactor can not.
In short if only contactor is connected in circuit.. in
case of ubnormal like OV or OC it will burn.. but if it is
connectedin coordination with relay.. relay will sense the
fault & give signal or command to contactor to trip
| Is This Answer Correct ? | 212 Yes | 90 No |
Post New Answer View All Answers
What is the use of mc( moving coil) in dc voltmeter and dc ammter and what is the use of ( moving iron)in ac voltmeter nd ac ammeter
Please nybody say, weather the result of Bharat Oman is declared or not? Probable date of declare???????
A motor running with lenze frequiency inverter stops if I REDUCE SPEED with 25% load.If I run it in High speed and medium speed running smoothly with full load.please help me to solve it.
While performing stability test of differintial cts how to know the voltage and current on both side of the transformer?
What are the effects of electrical faults?
What is the Temperature to be set in Thermostat provided in Marshalling box of the Transformer / Motor.
What is the use of oil in transformers?
how to calculate power consumption in slip ring motor at different step
How to calculate impedance volt in Transformer?
If I bring a basic electric meter from the States and hook it up in Costa Rica in a development that has only one transformer for the 50 homes, will it still be accurate regarding the usage of kilowatt hours?
I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?
what is earth pit , how we can measured it, what earth rods reference
sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company
What is meant by Im=30mA@Vk/2. How to know the kee point voltage for CT design
An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The rotor reactance at stand still is A 2 ohm B 1.25 ohm C 3.15 ohm D 2.25 ohm
