Answer Posted / k.prakashchandra

back up time depends on storage in batteries =VxAH.In
series voltages add up and in paralllel AHs add up

Is it required to do earthing in 2nd shop if earthed armoured cable is laid from 1st shop ?

1933

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List examples of voltage source?

1044

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3 shows a 415 V, 3-phase generator supplying a 3-phase 415/110 V transformer. Draw the individual and combined impedance diagrams to a base of 10 kVA. Determine the system fault kVA and the fault currents at the 415 V and 110 V busbars for short circuit faults on the transformer input or output terminals. Work in p.u. values of impedances.

2659

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work of choke in florocent tube circuit ?

2140

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What are the protection required for Transformer, motor, Line, Generator, capacitor, that all i have to refer which standard?(Like Transformer detail IS 2026)

2017

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234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

2034

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Mention what are the types of semi-conductors?

1217

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What are the two types of compensation?

1164

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what is PID control in VFD drives?

2002

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Iin ESP why positive is grounded ? why not negative ?

2661

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What is mason's gain formula?

1301

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What is the best thing to protect the motor from running over full current. CT or O/L or pressure transducer at the given pressure rating

1544

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Explain the following and how these are working with PLC Unit 1 I/O Module Card 2 Adaptor Card 3 Ribbon Adaptor 4 I/O bus 5 I/O Devices

1627

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Why transformer used in UPS??

1607

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volts=230 c=10mf a=??

2043

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