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.

we use 400/5A ct and 35/roor3KV,/0.1/root3KV,0.1/root3KV pt ratio. What is the multiple factor of this meter.

0 Answers   ABB,

How to calculat the ratio of HT\LT in energy meter

0 Answers  

1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.

0 Answers  

What is meant by coupling capacitor?

0 Answers  

What is mean by INRUSH CURRENT?

8 Answers  

What is mean by diversity Fator?

7 Answers  

i m doing DEEE in part time,can i join regular cources in BE,,IF i join what the cources can i select like (civil,ece,IT) ,,kindly advice

0 Answers  

How to calculate the sag of OPGW during stringing???

0 Answers  

CONSIDER A 415V/200V STEP DOWN TRANSFORMER.CAN WE USE USE IT AS STEP UP TRANSFORMER BY GIVING 200V IN SECONDARY AND TAKING OUTPUT FROM PRIMARY?

3 Answers  

1.What is the difference between isolators and circuitbreakers? 2.What is bus-bar?

1 Answers  

how hydrogen cooled alternator undergo maintanence ? that is hydrogen when come in contact with air can result into explosions .

0 Answers   DVC,

why most of junction box vendors providing T5/T6 Temp class jb's for T3 area any special reason?

0 Answers