Answer / zan

A lock-out relay is generally placed in line before or
after the e-stop switch so the power can be shut off at one
central location. This relay is powered by the same
electrical source as the control power and is operated by a
key lock switch. The relay itself may have up to 24 contact
points within the unit itself. This allows the control
power for multiple machines to be locked out by the turn of
a single key switch.

Answer / mohammad irfan

Basically it is Master Trip Relay, it takes signal from all the relays and finally trips the breaker.

What is an automatic controller?

0 Answers  

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why the starting voltage drop in a cable needs to be limited?what is percentage of the voltage drop allowed during starting?

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why fractional pitch winding generally used in alternators?

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what is power factor ?

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if negative of DC supply used and positive is grounded through EGB, and if ELCB used in the system then is it sense the positive volatge and get tripped is it possible?

0 Answers   Delta,

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How to Make relay co ordination chart for a Electrical power distribution of a plant

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in transformer input is d.c signal which type of emf is induced

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what is the difference between surge arrestor and lightning arrestor ?

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Give idea about General Engineering. From which book i can study this topic. Pl. reply me via email. My email is ravi@bhelhwr.co.in, also give the name of book/website, from where i can prepare it.

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1.what is meaing of ups,and used in softwares and sud stations,and main partes in ups. 2.main partes of the Disel Genarator. 3.main partes of the chiller and safty equipments.

2 Answers  

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When charging a 20 MVA , 33kV/6.6kV transformer through regulated (0-6.6 kV or 0-33 kV) source on no load , what will be the maximum current drawn by transformer from source and what sould be the source capacity.

5 Answers   TATA,

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What motor is used in ceiling fans and what motor is used in table fan.? why table fan is costlier than ceiling fan?

6 Answers   Bhel,

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