Answer / mohamed abuthahir

Apfc panel calculation depends upon building over all load ex .. Escalator 6 floor power formula p=i×v×1.732÷1000 assume A=17 3phase v=415 apply the formula p=12.21926 convert the kW ×1000 12219.26kw. It is convert by HP divided by 0.746 ans 16.3 6 floor 16×6 96 HP capacitor is inductiveload so 1÷3 96÷3= 32 kvar

in a delta-star with neutral grounding on star side what will happen if one star limb  got opened at star point

1 Answers   NTPC,

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What current flows in the transformer primary when its secondary is open?

0 Answers  

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we are using three transformer 33000/430 vac for three separet block.all three transformer have three LT panel separetly. can be Interconnected all three panel through bus coupler. this is permissable or not by state electricity board.

4 Answers   Piramal Healthcare,

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What is Phasing out test?

1 Answers  

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pls,send the previous year written test questions.

0 Answers  

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IT IS SAID THAT THE OLTC OPERATION SHOULD NOT BE PERFORMED WHEN THE TRANSFORMER IS GENERATION TRANSFOREMR/STEP UP MODE. WHY IS IT SO?

1 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

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why we not used 11kva as a direct our electrnics component.

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why is only third harmonics is dangerous for electrical equipments?

3 Answers  

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iii) A shunt motor runs at 70 rad/sec from a 460V supply and takes in an armature current of 100A. Resistors of 2.52 ohms and 1.64 ohms are connected in series with the armature and in parallel with the armature respectively. The field excitation remains direct from the 460V supply but the generated torque is halved. Determine the new running speed. Neglect brush voltage drop. The armature resistance is 0.4 ohms. [15]

1 Answers  

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What is the maximum advisable distance where it is required to interconnect a 500 KVA 480 V 3 ph transformer and the main panel or MCC ignoring the voltage droop affectation, does it is exist any standard about it?

2 Answers  

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What is the main use of rotary phase converter ?

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which phase is preferred for connecting 1 phase vt used for synchronizing OHL? WHY?

0 Answers   Siemens,

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