Answer / vishnu ps

One way gang switch is used to control single/multi
light/load(or combined) points with one switch,eg switch
for toilets(when the switch is "on" Ex.fan as well as light
will work),two way one gang is to control single/multi
load/light points with two switches,eg-staircase/balcony
lights

how to compare with Relay settings for HT&LT panels, RMU panel, and PSS CSS transformer?? 1) Load amps, 2)Tripping time, 3) CT ratio, 4)Cable size 5) Transformer KVA rating 6) transformer full load amps

0 Answers  

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if a single phase 3 hp submersible pump of Crompton Greaves is moving in reverse direction and sometimes it moves in rigth direction ,then what may be the cause....

2 Answers   Crompton Greaves,

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what percentage of marks in B-TECH is needed for section engineering exam

1 Answers   RRB,

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why the excitation is necessary to produce the reactive power

2 Answers  

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Explain the function and difference of Restricted earth fault, simple earth fault and sensitive earth fault with connection diagram.

0 Answers   ABB,

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71ohm,111ohm,95ohm,179ohm in calculate the total ohm in series circuit

0 Answers   Machino,

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i have 500 amp inductive load of motors ,,,pleas tell me how can i calculate for capacitor bank for improving my power factor to 99 .....calcullations for capacitor bank,,,,

0 Answers  

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In CT, burden is 15 VA and protection 5P20,CT ratio is 100:1 then what would be the knee point voltage ?

2 Answers   ERL,

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what is the difference between megger and earth tester?

28 Answers   Ashok Leyland, IOCL, RRL,

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If the capacitor bank is installed in switchyard say 132/22kv then on LT side say 22kv/0.433kv is it necessary to install capacitor bank for maintaining power factor. if pf is maintained on HT side then will that be maintained on LT side as well.if not then how&why??????/ please explain...........

3 Answers   MacLellan,

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In Round type three phase transformer why the LV side is inner part and HV outer part in the design of transformer? why they cant be opposite?

2 Answers  

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1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.

0 Answers  

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