Answer Posted / susmita

high silicon steel

why and how current drawn by battery charger depends upon the altitude where it is located?

2019

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what are the stresses in circuit breakers ?

2001

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which network topology offers the greatest level of tolerance?

2127

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Where voltage are high and current to be interrupted is low the breaker preferred is:

2271

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any one can explain what is the size of pvc,armoured, various sizes of powr cable dia?

1905

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at what rate the micro controller increment its timer....is it 1micro seconds or 1/(12*10^6) seconds

1772

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1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.

2014

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1. what is usage for power factor in industries?? 2.why we need to monitor power factor??

8132

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i want to know how to determine that a surge arrester work properly in 11kv system. and how to test a 12kv surge arrester

2146

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Tell me in detail about c.t. And p.t. ?

1136

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How to calculate fault level of 11 KV system

2062

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A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

2800

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Classify milling machines.

1112

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Iin ESP why positive is grounded ? why not negative ?

2625

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What is an Air COmpressor

2229

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