Answer / Atul Kumar Rai

HT 11 kV slipring motors are usually connected in a star configuration for voltage regulation and power factor improvement. By connecting the motor in a star configuration, each phase has its own return path, allowing for individual phase voltages to be controlled independently.

How can we calculate ngr resistance for a generator and Transformer ? What type of transformer requires ngr ?

5 Answers   Welspun,

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why we connect dg neutral with ground?

1 Answers  

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A 60W,250V bulb when connected to a 230V supply will it give more light or less or will be give normal light?

3 Answers   MahaGenco,

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How to measure the earth resistance value in a concrete pavement(flood light area)?

1 Answers   ANZ, Watt,

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What are the consequences in using existing step up transformer (primary 6.6kv/175A, secondary 480v/2405A) for step down transformer to have a 6.6kv output?

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what is the power factor?please tell me uses.

5 Answers   NTPC,

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How much ph is maintained of water resistance starter for slipring induction motor ?

1 Answers  

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why there is no short circuit when any resistance is used between phase and neutral?

3 Answers  

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circuit breaker work alone during fault condition or need any relays ?

4 Answers  

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what is the speed of mixie?

5 Answers   Keltron, TCS,

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1.WHAT IS A SMART CAPABLE DB ( DISTRIBUTION BOX) ? 2. HOW TO DECIDE THE TYPE OF DB TO BE USED ( RECESSED/ PLUG TYPE/ SMART ETC ETC? 3. WHAT IS MILLENEUM BUS BAR USED IN DB? 4.DIFFERENTIATE MCCB AND MCB.

1 Answers  

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WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

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