What is true sine wave or pure sine wave inverter??
Is it sine wave or step wave??
If it is step wave, waves with how much step is considered
as pure sine wave?
Is it possible to produce pure sinewave using power
electronics?
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why master trip(86) used in eletromagnet?
wht is an AVO metre. and whre it is used?
why there is a temperature rise at different metal to metal contact at cable lug??suppose cable is aluminium and the lug is copper,than why the temperature rise takes place??
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
What are the no-load losses for the 11000/415V transformer with the following rated capacity? 1.1500 kVA 2. 2000 kVA 3. 2500 kVA 4. 3000 kVA
why we are useing capciter in EB meter?
1.what is surge 2.what is lightning 3.what is switching 4.difference between surge,lightning,switching used in power system 4.definition of surgearrestor,lightningarrestor 5.adv and disadv of surgearrestor,lightningarrestor 6.uses and purpose of surgearrestorand lightning arrestor 7.block dia of surge arrestor 8.blockdiagram of lightning arrestor 9.operation and working of surge arrestor and lightning arrestor 10.basic formula of surgearrestor and lightning arrestor 11.basic diagram of surge arrestor and lightning arrestor
1 Answers Crompton Greaves, Framo, L&T,
which type of motor using in drilling machine ? & who to produce very high torque in drilling machine?
1 Answers National Drilling Company,
my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?
What is mean by Power factor
What is Difference Between static & Dynamic Pressure of Fan & Blowers
Why transformer neutral earthing? What is advantages?