For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.
3 6492In 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.
1522in our sub station why we step down firstly 33kv\11kv then 11kv to 430v. can we direct step down 33v to 430.v.
18 36580When semiconductor fuse does save thyristor in each cycle of conduction? Why under voltage setting keep less in SPRS and more in DC drive?
1642Post New Electrical Engineering Questions
How to calculate the copper in HT motors if KW, RPM & Voltage is given
What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.
please suggest some good universities with low cost iam in totally full confusion so please help me my profile gre 283 and ielts 5.5
Why do power lines not short out when they fall into water?
Which motor will you choose which can operate in both lagging as well as leading power factors?
how to select the double earth conductor if 21A full load?
Igfet is a
What is meant by reactance voltage?
what is the reason the main breaker is trip during the motor is running? (some time the breaker is not trip)
I WANT TO know WHICH WAY IS BETTER FOR CONNECTION BETWEEN POWER TRANSFORMER AND MAIN DISTRIBUTION PANEL. 1-IS BETTER WE USE CABLE? 2-IS BETTER WE USE BUS DUCT? my transformer rate power is 2500KVA
the grid connection required for a 50 MegaWatt fotovoltaic powerplant is higher or lower than 35kv (high or medium tension)?
Convert a star connected network into a delta connected network.
What are the various kind of cables used for transmission?
How Self works in DG set
What Is Sampling?
