check list of maintenance of transformer?11 88738
what is the voltage between the earth & neutral 2 is there any continuity TO BE between earth & NEUTRAL3 7005
why d.c. supply is given to the primary side of generator?4 4151
what is current actully?significance of current...not rate of change of flow.....3 2461
whether inrush current for lamps or capcitors should be considered cable sizing to feed that load.1 1960
Wht ar the reason for low voltage on consumer side?6 4925
what happens to the speed of a DC series motor when series field winding is removed?8 7298
what is the meaning and full form of AYFY CABLE?10 32746
Metal covered multiconductor cables shall employ a marker tape located within the cable running for its complete length in lieu of cable surface marking. Is it true or false?
how give earthing conection to household equipment?
What test must you do before powering up a circuit that you have been working on?
What will happen if i connect the delta winding motor to star input.
how is find out kwh step by step
Greeting to all members, How to calculate spill current when we have different ratio CT and Class for REF(Low Imp) I have 500/1A 5P20 @line side n 400/1A CL.X @ Neutral.
my project load is 6 MW so please suggest the size of cable.. ALU 3c 400 aqmm cable can be sufficient.. is there any thumb rule for calculation of cable size please help me
how we can come to know that motor winding resistance which showing by DMM is right or wrong???is there any chart or something that we will compare & check???
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.
Why do we need interlocking in a HT metering or Ring main unit switchgear?
does any one know where we can purchase insulation oil for high voltage oil filled cables
What is the problem of internal failure in ship engine telegraph system norcontrol?
Calculate torque developed by the 3-phase, 5 H.P., 4 pole induction motor runs at 1500 rpm A 23 N-m B 21 N-m C 10 N-m D 0 N-m
why capacitive load is not used in routine life????any reason is there ??????
In the Variable Voltage Variable Frequency Drive, how the Voltage and Frequency varied ? Is it varied in the Inverter part of the Drive ? Please give us supporting document if any.