what is difference between speed mode and torque mode in motor?? explain in simple words please.

1614

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If more than rated DC voltage appears across trip coil of the breaker, what will happen? e.g. in 110V DC circuit system, if voltage across battery terminal showing 121 V

1674

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11kv/433v delta/star distribution transformer primary side full load Ht current is 83.33A in , but input side VCB rating 800A.why?

1678

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In apron feeder how TPH is calculated?

1749

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a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5

1719

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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.

2053

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Gidc technical que paper

1788

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How to define Kirchhoff current law and voltage law along with simply examples.

1788

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Stringer How many cm goes to landind

1790

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Rate analysis for construction of a solid block masonary of size 400x200x200 in C.M.1:5 in superstructure .Compressive strength 5.00 N/Sq.mm Confirming to IS: 12894:1990, with necessary scaffolding, raking of joints and pointing the same. I require rate per Cum.

2558

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I want to preparation of mppsc interview

1528

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what kinds of Transformer oil grade is better for power transformer ?

1654

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why steel tanks are provided (a) for water pressure (b) for wind pressure (c) for earthquake pressure

1649

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Why is voltage is required to be within permissible range for an electrical equipment?

1725

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why with the increase of pressure latent heat of steam decreases?

2128

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