Answer Posted / doli tomar
When a relay is used to switch a large amount of electrical
power through its contacts, it is designated by a special
name: contactor. Contactors typically have multiple
contacts, and those contacts are usually (but not always)
normally-open, so that power to the load is shut off when
the coil is de-energized. Perhaps the most common
industrial use for contactors is the control of electric
motors.
| Is This Answer Correct ? | 67 Yes | 6 No |
Post New Answer View All Answers
Is it good to short Neutral and Ground in the PLC or DCS main Power supply. Pls give YES or NO with reasons...? Simarpreet
When and where resistance earthing is used ? How to calculate the time constant for earth fault
how to select overload-relay for perticular motor 1.for D.O.L. starter 2. for Star-delta starter ????
What is industrial plc
What is nichols chart?
At what factor resistance r of a conductor depends?
how can maintaince the acb contactor moveing and fixing kit
WHAT KIND OF LIGHTENING PROTECTION SCHEMS CAN BE ADOPTED FOR THE FLAT ROOF OF BIG DIMENSION.
Cb closed condition if there is a tcs fail whether cb will trip or not
Explain how to determine capacitor tolerance codes?
from which subjects most of the technical que will b asked for hpcl(electrical).pls help me
what is meant by CT`s saturation ? Can we use Metering CT`s with Protetection CT`s ?
Describe the colour rendering properties of i) tungsten filament lamps ii) tubular fluorescent lamp
63MVA,220KV/6.9KV Transformer LV side neutral is connected to Earth pit through NGR. Whether this earth pit required to connect with near by below grouding earth mat or it is to be kept separate?
How to measure the Harmonic Distortion of UPS ie THD?
