Answer Posted / Bhoopendra Singh

When changing a faulty contactor, you should ensure that you have the appropriate replacement part and tools needed for the specific contactor type and application. Here are some general steps and precautions to follow:nn1. Isolate the circuit: Ensure that the power supply to the contactor is turned off, and all energy sources (e.g., batteries) are disconnected.n2. Remove the cover plates and mounting screws, if necessary.n3. Disconnect the terminals or wire connections from the faulty contactor, taking care to note their arrangement for correct reconnection.n4. Unmount the faulty contactor from its bracket or mounting surface.n5. Install the new contactor in its place, ensuring proper orientation and alignment.n6. Reconnect the terminals or wire connections to the new contactor.n7. Reinstall the cover plates and tighten the mounting screws.n8. Restore power to the circuit and verify that the contactor functions correctly.

please give some hindalco placement papers for written exam

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Can you used moeller lzm1 mccb in a dc system with 125vdc and 20ka short circuit current , beside is it have 24 or 48 volt shunt ? Beside how long current can through from An MCB shunt contacts? (like Z7-AS 24 V)?

2146

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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.

3440

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compare between starting charactristics of synchronous motor with those of 3Q Squirrel cage induction motor

1874

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i've iocl interview.. if you know the interview process please give me information..

2100

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I NEED RRB SYLABUS FOR JE ELECTRICAL ,PLEASE SEND TO MY E- MAIL ID joo28_eee@yahoo.co.in

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hai friends i have BSNL JTO exam on next month so if any body have model question paper or give preparation tips to my mail id kumar4486@yahoo.co.in this will helpfull for my future .plz & thank u by kumar

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Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam.

2783

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If a current -8+6sin6t is flowing three ammeter, one is a centre zero PMMC meter, one is true rms meter and one is moving iron meter. What are the reading of these three meter respectively?

2301

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hi this is hema, r there any books in particular for the preparation of the APPSC-A.E.E(electrical), if so please mail me the names ... thank u .

1987

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1)how to reduce the value of tan delta of trasformer and CB,bushing,CT&PT,CVT ? 2)how to reduce the resistance of CB contact and its operating time? 3)plz.....send me the project report on conditioning and monitoring of substation equipment on my email id (gusaiyogendra03@gmail.com)

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Why squirrel cage motor can only use with low starting loads ?

2135

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Please send 110 kv sb station full single line drawing(sld)

2533

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If not into production, how far did you follow the design and why did not you see it into production?

2233

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Please nybody say, weather the result of Bharat Oman is declared or not? Probable date of declare???????

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