Interested to Buy Any Domain ? << Click Here >> for more details...
Why is the earth fault relay connected to the Yellow
Phase?
- 4 Answers
- 9922 Views
- I also Faced
- E-Mail Answers
Answer Posted / s.patel
There is no condition like that ,we can connect earth fault relay to any one of the R,Y&B phases ..
| Is This Answer Correct ? | 10 Yes | 1 No |
Post New Answer View All Answers
Explain what is clipper and clamper circuits?
What is size 00, 01, 1 etc., in HRC fuse types?
how to decide the panel size like MDB ,SMDB PANEL SIZES
1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.
when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)
What are the transformer losses?
We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?
how do you choose the cable size as per amps rating & the voltage drop for the same.
I have made a 3 phase thyristor full bridge rectifier. But at the moment it is working only for the half bridge operation. Both the half bridges are on operation separately but when i put it into full bridge operation the oscilloscope output is zero. I rechecked that the pulses are correct for each thyristor. what could be the possible reason for this?
What is lifting power for 1 wb/m2 and 1 A magnet?
primery try cell?
Why the moulded plug comes with domestic appliances instead of assembled plug like anchor, Vinay 5/15 A.
Salient pole alternator is more stable, why?
How to Calculate the Fault Level of Electrical Installation
Meter p.t. ratio= 3×230/400 , c.t.ratio = 3×1 (2) A what is m.f.
