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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 3367

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 3462

why power of fm is weaker than am?

1 3437

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

1887

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,

2179

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

L&T, MahaDiscom,

1 17839

how to calculate the fault in substation

2367

wow to calculate the transformer rating(KVA)

2223

in 33kv line how much current will be

3 29178

what is the condition for YnD11

Bhel,

2508

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

2377

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

2154

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

1 4125

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

2187

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

2257


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

difference between servo motor and synchronous motor

2285


What is kvar?

1300


how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.

1937


explain safety measures in alternator?

1728


WHAT IS THE DIFFERENE IN ACTION OF MCB,MCCB,RCCB

2376


Please explain me abt PQ diagaram in the power sector.

2377


why various test are performed on electrical panels & power cables before commissioning on site & what are these test???

1946


sir i used 3 hp of motor for spraying pump, other home light and other home items which size of allminium pvc wire ix used

1850


Diagram and details of polarity test for Current Transformer 11kv 400/200/100/1A

2992


What is the safety of UPS?

1974


If a rotary UPS is in line through grid power; What would be the impact on Power Factor if the load through rotary ups is 25% , 50% , 75% & 100%. Will the power factor reduce with less load?

1841


why we used dc supply for field in dg set

2346


how to test the electrical panel.ht lt mcc pcc.

3737


Why strting torqe high in inducation motor?

2109


What happen when change order of CT in GIS feeder?

1606