Answer Posted / c.hari balakrishnan

Instrument transformers (potential & Current)used for
protection and metering purpose...Current transformers
which is used for protection is normally 5P20 class,
for differential protection i.e, PX class cts & Metering
0.2FS5 class Cts whose saturation value is very less...
For Voltage transformers 0.2 & 3P class for
metering,Protection...

1.Can we use 6.6/11KV 300sq mm xlpe 3core cable for LT use (415 Volt). 2. If we use it for LT then what is the current rating

1757

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explain working principle of earth leakage relay

3688

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i completed my DEEE. and i want to electrical c license. how to get it..?

2155

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it is possible to rotate the DG engine dc starter with wrong polarity connections? why?

2236

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neutral earth resistance testing is it possible for transformer while in load condition

1933

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WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.

2053

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what is the difference between ups & inverter

7093

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is there any lightning by passer is arranged in ship like buildings?

1923

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I use 20 nos led tube 4feet, in pathway 100mtr approximate, so what size cable i use for lighting

1446

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Load break swicth maintenance procedure.

1753

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According to IEC60034-14, When the vibration monitoring system required for motor Bearing. above which KW, it is required? and for what type of bearing the vibration probe is provided.

4157

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how external lighting design? please give examples?

1866

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i have install 750 kva distribution transformer at my site and want to do neutral earthing. what calculations should i follow to determine earthing conductor material and size?

2042

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What is earth?

2415

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what is the purpose of slope in the differential relay?why we are using two slope?but in busbar differential we are using only one slope.why?

2889

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