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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Energy metering: On the property I am renting, the supply voltage is 2 x 110 volts. These 2 x phases enter a energy meter which then exit the meter to over head lines to my house. Question 1. The meter is single phase 240 volts but is being used as 2 x phase(2 x 110volt), is this acceptable? if not, please give me the reasons. The meter details are as follows: 60Hz 15amp Imax 100 amp Kd 3,6 Wh/R 1 fase 3 hilos Model FX 231. I think it was manufactured in Brasil From this meter, the cables run along over head aluminum conductors,I estimate the cross sectional area to be 25mm diameter, but the neutral is only about 10mm square diameter, which cover a distance of 170 meters and then terminate with an underground cable of 65 meter length, total length = 235 meters. There must be a huge voltage drop over this length. This line is protected with 2 x 200 amp aluminum fuses after the meter, there is no main switch in the distribution board. These 2 phases connect directly onto 2 busbars. Surely the neutral should be the same size as the conductors if not more? Question2. What are your thoughts about this installation, should there be better protection, is the neutral too small? During the night, the lights dim then brighten all the time, this cannot be good for my electrical appliances. In my home, I only have a small electric geyser and fridge, my stove works off gas. But when i use other appliances like the washing machine or microwave oven, the light dim. The internal wiring of this house is done with solid hard drawn copper wires and of course, they have to be under rated. I am a retired electrician by trade, but not on the metering and over head mains side, my experience is on the factory maintenance side of things. Your expertise on these matters will be greatly appreciated. Please inform me how to rectify or make any improvements Kind regards, my power bill is very expensive, so I need to know how to bring it lower. Kind regards, Brian

1 3447

in a live circuit with a light bulb such that the bulb is off by a switch, is the light glows if the switch 2 terminals are both touched by a mouse?

1 3524

why power of fm is weaker than am?

1 3523

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

1922

in an electronic tri vector meter when the current and voltage sequence changes ? what is the effect of phase sequence on recording of meter

L&T,

2232

what is the difference between 3 phase 3wire &3phase 4 wire meter?what is the advantage of 3p3w over 3p4w?

L&T, MahaDiscom,

1 17937

how to calculate the fault in substation

2458

wow to calculate the transformer rating(KVA)

2269

in 33kv line how much current will be

3 29323

what is the condition for YnD11

Bhel,

2556

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating

2415

what is sevice settings for mccb?How can be it setted?

2228

why sielent pole is used only in hydro generators and not in turbo generators

1 4184

any idea abt REVERSE METERING concept.........?

2242

2 v/500amp/hr to 1.80vpc at 20 degree celsious 2v/5ooamp/hr to 1.75 vpc at 77degree farren .this is the capacity of a battery .what is the meaning of this . can i get a detailed explenation

2302


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

why should the primary of transformer be connected in delta in a heat run test?

1982


why using transformer and thyristor switch in 3 phase apfc panel

2879


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2740


What are steps to be taken while designing of DYN11 distribution transformer to achieve magnetising balance?

3541


sir vizag steel ka junior trainee ka paper kitne number ka ayega

2245


What is DTR erection?

4068


what is the write prosidure of stringing of 8meter pcc pole.

2454


An ELHNC 80amp 240v 30mA RCD is tripping periodically, every 30 - 180 seconds is it safe to disconnect the protection circuit?

2150


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2046


what is the main function of capacitors in mccs.

1742


11000volt DG set carnt kaise banvay

1678


What is the ideal position cooling fan inside the dc motor?

2091


how to decide the panel size like MDB ,SMDB PANEL SIZES

7377


Why is a plain induction motor unsuitable for wide speed control?

2276


i am completed my degree(B.E EEE) 2014 anychance to get electrical licence plz help me

2149