Interested to Buy Any Domain ? << Click Here >> for more details...
what is the safety of VCB.
- 5 Answers
- 31979 Views
- Nagarro, Roto Power, RotoPower, I also Faced
- E-Mail Answers
Answer Posted / kumar manish
VCB saftey-
1.Earth leakage
2.Current unwanted due to Short Circuit.
3.Over load
| Is This Answer Correct ? | 16 Yes | 4 No |
Post New Answer View All Answers
A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.
The magnitude of sum of two sinusoidal av voltage is equal to 230 volt.the magnitude of each individual voltage is also equal to 230 volt.what must be the phase difference between voltages?
What fomula is used to calculate: 1. rated frequency withstand voltage, and 2. rated lightning impulse withstand voltage.
why Lightning arrestor are made by 2 seperate stack of inslutor but why cvt are in single stack of insulator.
What is different between Difnit time and instatous over current relay
why do we need to use 3c+3e cable, normally i select only 3c+e cable and i think it is enough. pls explain the usefull of 3e cable ( in this project the earthing system is well done)
Why are lt windings placed near the core?
what is cathodic protection and why it use in industries?
diff b/w elcb and rccb
what is fault level of power system ?
Why have to use copper cable for local isolator to motor ?
How I calculate the ELCB for circuit breakers?
I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.
Why induction motor is widely used in industry
How to measure the earth resistance value in a concrete pavement(flood light area)?
