Answer Posted / bala.a
Consider 1.6 A for Cu Bus and 0.8 A for Al bus .
Example
consider 50mm x 6mm Busbar
50 x 6 = 300sq mm
so
300 x 1.6 = 480A
This size Cu bus suitable up to 480 A
300 X 0.8 =240 A
This size Al bus suitable up to 240 A
Is This Answer Correct ? | 11 Yes | 1 No |
Post New Answer View All Answers
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.
i am going to correct power factor of 1600kw induction motor,when i calculate capacitance of capacitor it is three time more in star connection than delta. if motor is star connected which connection i shall adopt for capacitors and reason for adopt this connection
explain the Trip supervision circuit
Pls tell me whether we can use EN3A material for shafts of Permanent magnet alternator.What will be the effect of magnetic and nonmagnetic material for shafts on magnetic properties of PM rotor .
in india per day how much power is generated including all power station
what is method for testing CT
What do you mean by reach and reach the point of the relay?
dg earth connect only in the amf panel or not why
explain transformer ct connection?
What is the IS standard for MCCB to be use (As per capacity of AMP)& for ACB also.
what is the safty of poly phase tranformer?
What is mean by hot and cold loop testing? What is the difference between them?
why the earth is taken minimum in supplying? wather it the proportional factor to getting work any equipment or a power plant?
Which thing is maximum in RLC circuit at resonance a)power consumption b)inductive current c)capacitive voltage
can indirect loading be called as phantom loading?