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when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?
2543when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?
4 24719can any one tell me the formula to select the thickness of wire selection according to ampere rating
2 4748I want to know the currect formula for industrial lighting lux caluculation & light fittings selection
MRF,
2 8008why the earth is taken minimum in supplying? wather it the proportional factor to getting work any equipment or a power plant?
1965A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?
L&T,
5384If a motor of 30KW rating &200 mtrs distance from feeder give me the cable size selection calculation?
1823Post New Electrical Engineering Questions
how current is reverse from its normal direction during the fault?
Differentiate between ideal and non ideal current sources?
Give the topology of current amplifier with current shunt feedback?
at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.
What is the main cause of magnetism?
Usually in the L & T make MCC feeders' power circuit,we have BMR after the MAIN CONTACTOR.,can we interchange their position, keeping the control logic same???
what is the concept of directional power?
How do we calculate the Out put voltage of generator, after the excitation is being given?
How can calculate the rating of a servo stabilizer for given a specific load
In synchronization circuit what is the function of Interposing voltage transformer(IVT)and Reverse voltage transformer(RVT)
why we permissive overreach in distance protection.where it is applicable to use in long r short lines
What happens if we run alternator on under frequency?
Could you measure voltage in series?
How To Convert Apparent Into Real Power Without Knowing Reactive Power?
draw the restricted earth fault protection circuit install on power transformer and identify its parameters and draw C/C curve of it
