Interested to Buy Any Domain ? << Click Here >> for more details...
what is the safety of VCB.
- 5 Answers
- 31872 Views
- Nagarro, Roto Power, RotoPower, I also Faced
- E-Mail Answers
Answer Posted / arvind kumar
VCB SEFTY
Earth fault
Short circuit
Over current
| Is This Answer Correct ? | 38 Yes | 10 No |
Post New Answer View All Answers
What does bode plots shows?
WTA used cb?
What are the electrical engineer roles and responsibilities in chemical plant?
How to design a Unit auxiliary transformer for a power house having a unit of 65 MW and Generating voltage of 11 KV and Secondary voltage of 433V
The metal-enclosed switchgear and controlgear is subdivided into three types: 1. metal-clad switchgear and controlgear; 2. compartmented switchgear and controlgear 3. cubicle switchgear and controlgear. What is the main differnence between them. State some example.
Inductor and capacitor........power in one phase and ...... in it another phase.
how to calculate the fault in substation
sir please send me previous year questions of jspl of electrical section through which i could prepare myself fpr the test.
details of oil cell size of Breakdown voltage test of tranformer oil details as per Standardswith mushroom electrodes?
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.
Batteries used for electrical energy storage are a. Laclanche cells b. Edison cells c. Lead acid cells d.any of the above
How do we calculate over and under frequency tolerance from generator data?
how hydrogen cooled alternator undergo maintanence ? that is hydrogen when come in contact with air can result into explosions .
How much voltage we need to apply in 33kv cable during hipot test of cable
What is the formula to calculate the rating of a three phase air circuit breaker
