Answer / sewagudde

a relay is a device used to measure as specific quantity
(current, voltage, frequency,phase displacement etc)and
should that above quantity deviate from the preset nominal
value then a signal is sent to the circuit breaker to
operate.

what is difference between power transformer and distribution transformers

1 Answers  

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what is load cell

3 Answers   TATA, Wipro,

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What will happen if an AC induction motor is applied with DC voltage?????????Kindly give all the posssible answers...

2 Answers  

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ratings of lightning arrester

0 Answers   Bajaj,

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What will be the size of copper cable (each for 3 phase and 1 neutral) from Service connection Kit-Kat to Panel Board (i.e. to main switch) for a 6 pole 3-phase AC induction motor of 200 H.P. capacity? Amp-255 A, Frequency:- 1450 rpm.

0 Answers  

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How to conduct Magnetic Balance Test, Measurement of Excitation Current (both on HV- and LV-side) and vector group on a 1000 KVA distribution transformer. There is a neutral on HV side.

1 Answers  

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What is the working principle of servo motor? And explain it.

0 Answers  

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why we use low kv lightining arrester in line for example 9 kv using in 11kv

1 Answers  

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I don't understand why when we connect high voltage source in DC to electronic motor , we must add capacitor and resistor in parallel ? (I know that we use capacitor because we want to absorb the current that in the first second electronic motor in opposed with current course produce. ) what are the feature of Resistor and in such situation ?

0 Answers  

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What is OLTC in transformers and what is its function?

4 Answers  

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I want to know if it is possible to use Variable Frequency Drive to reduce the current required for starting a motor?

3 Answers   Descon,

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why transformer rating in KVA ?

8 Answers   Bhel, TATA, Voltage,

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