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Auxiliary relay used for standby protection of electrical circuit when main relay fails to operate.
PLA relay used for feedback purpose.its work like a NO NC .

Due to velocity saturation, MOSFET reaches saturation a.Before Pinch off b. After pinch off c. At Q point d. Before Q point e. After Q point

1 Answers  

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Which pump set is more suitable and economical for liftingwater from 300Mtr borewell? A. Compressor Pump B. Submersible Pump C. Jet Pumps D. 25HP Centrifugal Pump Q. from PSC Test 22-11-2008 Meter reader

8 Answers  

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Why TAP changer provided in primary side of HT transformer ? and why not in secondary?

9 Answers   ABB, Reliance,

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what happen when transformer connect on dc supply.

5 Answers  

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what is mean Boost voltage and what is working principle of Tube light

2 Answers   Trimax,

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The following equipment are installed ia a plant 1. 110KW Induction motor 4 Nos 2. 30 HP motor 3 Nos 3 15 HP Motor 3 Nos 4 7.5 HP motor 4 Nos what is total load of plant if one of each is stand by.

3 Answers   Blue Star,

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which on of the transformer have more core losses and why? 1. Distribution Transformer 2. Power Transformer

5 Answers  

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what is the difference between HV and LV Breakers?

4 Answers   GM General Motors, OEG,

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There is 3phase power cable from 1 point to the other point which is 100m away. Two point equipped with power meter and recorded 1st point is 205kW while the 2nd is 202kW and each phase average carry 400amps. To calculate the resistance of the 3phase power cable, is the formula using will be P=I2R?

3 Answers  

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Suppose a 3 phase, 2 pole, 440V induction motor is driving a flywheel of 600mm diameter, 150kg mass. By using v-belt and pulley, the speed is increased to 4500 RPM. What will be the effect on motor current?

0 Answers  

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What is mean by spike arrester(Voltage Operated)

0 Answers   Siemens,

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when we r using single phase load and we have power cable of 3.5core with .5 of neutral and neutral is suppose to the returen path of the phase how much current will flow in the neutral.reply.

2 Answers  

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