what is the resistance value of earthing pit and why they are connected?6 11900
what is the meaning of insulation level?2 4628
what is the function of RMU?4 14054
why ac can not be stored?5 5795
what is the working principle of tube light?2 3341
what is a tri vector meter? what are the tri vectors?2 4505
why we cannot apply ohms law to transformer?3 4423
working of bulb?1 2667
what is per unit impedance?3 9815
why overload relay is not tripped at time of starting of motor allthough staring current is too high?
we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.
model question paper for supervisor trainee
Can anyone tell the proper diagram of star delta starter????
What is Icu and Ics and what is difference b/w them. please tell me how to calculate a size of a copper bar for a system or a breaker... reply on... firstname.lastname@example.org would be waiting for a logical answer.
What are the basic properties of signal flow graph?
what is the illumination level required for child play area?
When distance between two pulleys is not fixed, the tension of belt is adjusted by a) driver shaft b) driven shaft c) adjustment screw d) belt
Define what is the function of anti-pumping in circuit breaker?
how to define tell me about self
What is the difference between grid and off- grid system??
How to set the relay,,??
HOW TO DESIGN THE body EARTH cable(Copper Conductor) size for 60KVA UPS?
Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?
How to calculate no of EARTH PIT? Describe the formula as per IS standard?
Explain using drawings what is reverse PID action w.r.t PID controllers.