Answer Posted / raja

It won't run in change in speed due to double excitation.
The motor runs in the synchronous speed due to magnetic
locking, if the speed decreases suddenly it get out from the
locking and goes to zero speed.

when qty of cable being purchased is not sufficient according to the standard,what should the inspector do to ensure its quality according to the standard?

2023

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How to calculate per unit impedance of transformer?

2121

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What is Bolted fault?

2156

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explain the Trip supervision circuit

2092

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What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?

1811

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what is the power factor used by the PHCN in nigeria? 2. what is the difference between an alternator and generator. 3. Generation of poweris in KV but how is transmission is in MW. 4.If the transmission of power is 20,000MW how can it be increaesed to 80,000MW

8557

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what is p.s impedance measurement test in earthing transformer?

2345

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I am having dual speed motor of cromton greaves make of 3.7 KW -1400 rpm and 5 KW - 900 rpm. Please let me know groups and winding connction for rewinding purpose.

1866

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How to decide cable tray size?

1081

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WHAT IS THE SIGNIFICANCE OF VECTOR GROUPS IN TRANSFORMER? WHAT WILL BE EFFECT WHEN PHASE DISPLACEMENT CHANGES IN TRANSFORMER?WHAT IS THE NEED TO BE PHASE SHIFT CHANGE BETWEEN THE PRIMARY AND SECONDARY WINDING

1741

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wat is the current produced in a 5000v megger? when the positive and negetive terminals are touched on our body get s shock?

1870

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How many types are using in 220kv/400 kv swith yard

2140

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how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?

2274

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In dc ckt. 24v or 110v, which one is more efficient and why?

2178

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why we use four type of phase angle difference between pimary & secondry winding of a transformer & where we use them?

2030

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