How to calculate the heat load for a electrical room

3085

design of IGBT firing circuit for 11KV

2642

what is active power & reactive power?

2190

Define sensitivity?

1099

How the setting of the vector surge relay shall be calculated when the relay is to be used for Grid islanding application?

2262

I am going to appear RRB Sr. Section Engineer Exam, Electrical. Can you send me previous year questions of RRB Electrical engineer. specially Section Engineer questions. my email id is likerahulworld@gmail.com

1811

what is effect of 5amp fuse on 2mva pry protection of transformer

1853

What does Bode plot tell you?

1400

How does a television work?

2311

which is the best institute for PLC,SCADA,DCS in hyderabad

2353

Is it possible to download the Siemens Selection Chart(TYPE 2 coordination) for 1) fuseless selection 2)Fuse selection

8226

in science exhibition how lamp can blink when you clap near the lamp ? thank you

1986

Is there any Electrical supervisor license which gives permit to work whole India rather than individual state??

1871

Name the test signals used in control system

1291

I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

1873