Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / aditya singh
The stable operation of induction motor near sub-synchronous speed Ns/7 is called crawling which is accompanied by much higher stator current, noise and vibration.
here Ns=asynchronous speed of induction motor
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
why it is so called as xlpe(cross linked poly ethyline) cable?
In EHV transmission line a neutral grounding reactor is often placed at neutral point of shunt reactors. What is the recommended protection for this neutral grounding reactor? Should I use a fast closing switch to bypass neutral grounding reactor when this protection operates?
What is the use of lag compensator?
how to setting voltage RTCC panel
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.
what is the common earth
What is depreciation factor?
If VFD is On but no starting commond on it. so how many outpout voltages of VFD
what happen if the parallel generator phase angle shift by 1 degree in manual mode
what is earthing.how we make it,describe briefly.
can i connect wavetrap in 2 different phase in EHV line?
Why is voltage is required to be within permissible range for an electrical equipment?
What is ignition module of a CAT Gas Genset G-3508 Engine, Alternator SR4B Series. HOw its checked for correct functioning.Is it repiarable or replacable?
what are the main faults that occur in stabilizers? How they corrected and resolved ? Types of stabilizers ?
How phase displacement change in the over current relay coils.
