Answer / ahmed mahmoud

PLC = Programable Logic Control
DCS = Distrbuted Control System
SCADA = Supervisory Control And Data Acquisition

4-Why we measure the insulation resistance of main core and frame in spite of that must be connected with ground before energize the transformer?

3 Answers  

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why there is no grow of grass under the high voltage transmission line?

3 Answers   TATA, Tata Power,

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improve power factor by : 1)shunt reactor 2)shunt capacitor 3)series capacitor 4)series reactor

2 Answers  

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we all know voltage is a force(emf), and the force always devides if 2 or more than2 loads are there but why does the voltage remains same is parallel, it must devide na ???

0 Answers   NTPC,

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what types of load we get from the national grid? is this capacitive or inductive?

1 Answers  

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a 440v 60hz 03 phase 100kw generator can deliver how much power in kw for 220v 60hz 01 phase load?

1 Answers  

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Give details of your interested designation, the post you are interested to serve the company better and explain why you think you can serve the company better in such position if employed?

0 Answers  

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what happend if the protection ct is by mistake put instead of measuring ct & vice versa?

2 Answers  

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why neutral busbar size is SAME of the phase busbar size UPTO 200A IN LT PANELS

1 Answers   IBS,

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1 Kva = How many KW

3 Answers   Reliance,

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How to measure size of cable on a given load

0 Answers   Green India Engineering Solutions,

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I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase, before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???

1 Answers  

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