Answer / mano

There are two types of Earthing are required in UPS.
1. Dedicate earthing
2. Body earthing

Answer / sushil kumar tiwari

Two Earthing required. 1st earthing for Body earthing. 2nd
Earthing for Neutral if UPS is Three Phase.

Answer / natarajanamkumar

Mr.Mani that is not Dedicate Earthing,and Body Earthing.
that is 1.System Earthing 2.Equipment Earthing.
thanking you.

Answer / saeed akhter khan

The earth is required for UPS due to back voltage the voltage in between neutral & earth 3 volta max.

Answer / prabhu

Three Earthings are required.

1. DC side Earthing to avoid the distortion in the line.
2. Equipment Earthing
3. Electronic Earthing for the cards which works in low
voltage.

Where the internal convertor will have the Trafo, that will
be connected for the common earthing.

Both should not common, if Electronic items will get affect
when Ground current flows more than a limit.

Answer / mani

Dedicated two neautral earthing and two body earthing

Answer / prabhukumar

1.Panel earthing or equipment earthing.
2. Neatral earthing should be their

Answer / manik

1,2,3,4,5,6,7,8

Answer / saeed akhter khan

UPS is required only one earth which is required for equipment which is working on it.

in 400 kv system why should trip both side CB when we give hand trip?

1 Answers   KPTCL, NHPC,

Dyn1 transformer vector group testing how to do

0 Answers  

hi frnds can any one help me ? plz send me placement paper of IOCL of Electrical streem .... plz send ....its urgent....

0 Answers  

whether fibre optic cable in high voltage earth conductor is used for protection circuits

0 Answers  

1.Why sinle phase motor is not self starting 2.working principle of alternator 4.list out electrical formula

2 Answers  

for what voltage will reactive power be largest in 380 kv line : a) 375kv b)380kv c)385kv

0 Answers  

sir, why alternator output is connected to delta side in to generating transformer? any reasion?

3 Answers   Kirloskar,

what is the safe meggar values for motor, transformer HT, LT and Cables? IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace. why we generally use 3.5 core cable or in other word 1/2 core for neutral and also confirm me that in balance conditiob(3 phase)current in neutral will zero

0 Answers   Jindal,

Why can we connect the mobile charger both ways?

2 Answers  

why are caluculte transformers or dg's in kva does not caluculate in kw

5 Answers  

we have a 2000kva step down transformer at our site. The HT side is charged from 22000V. So the primary current will be 52.48A. So why the HT breaker(SF6 ABB) is rated of 1250Amps ?

2 Answers  

calculation of knee point voltage of current transformer?

2 Answers   TATA,