Interested to Buy Any Domain ? << Click Here >> for more details...
What is working principal of V.C.B., O.C.B., A.C.B & Over load
relay?
- 4 Answers
- 33049 Views
- Unitech, I also Faced
- E-Mail Answers
Answer Posted / priti ranjan mohapatra
V.c.b - it stands for vaccum circuit breaker. It used in mv line as 36, 33 kv. In this the contact point of the cb remains in vaccum when it is off.
| Is This Answer Correct ? | 8 Yes | 8 No |
Post New Answer View All Answers
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?
What is frantic effect?
Why is back emf used for a DC motor? Highlight its significance.
Define resonant frequency?
what purose of the double circuit transmission line phase of the line phase changed for circuit-1 for Circuit-2 R-Y-B B-Y-R
what is the main difference between power devices and signal devices
How to measure the Harmonic Distortion of UPS ie THD?
Define end float in a motor?
What is the Resposiblity of Electrical Utility Engineer
What is meant by impedance? difference between high & low impedance ?
What is the emf equation of a transformer?
why do we use spark detector inside the slip ring brush compartment 0ona slip ring induction motor?
What is a parabolic signal?
What is the maximum and minimum rating of UPS?
What are the classifications of heating element?
