A 25MVA 3300/400V T/F is termed as per winding is ……
a) primary 3300V & Secondary 400V
b) primary 3300V & low voltage winding 400V
c) High voltage winding 3300V & Secondary 400V
d) High voltage winding 3300V & low voltage winding 400V
Answers were Sorted based on User's Feedback
Hi,
The T/F will be termed as 25MVA 3.3/0.400kV delta-star T/F.
The interpretation is that the primary is 3.3kV while the
secondary is 0.400kV.
| Is This Answer Correct ? | 3 Yes | 1 No |
1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.
why threre are two parallel lines in transformer's symbol?
What is TR of AC?
Can someone help me in the Below Quest on Earthing 1.Types of Earthing and Recommended for what use 2.What is the Pit value /Panel N -E value should be or within limit for RP and UPS .
why electron flow is opposite to current flow?
Describe kW and kva and difference between
what is the difference between 5P20 class CT , PS Class CT and 5P10 class CT??
Which Kind of machines(in terms of poles) give the smoothest DC
Why Neutral Busbar CT & transformer neutral CT connected with phase CT in Restricted Earth Fault?
how withstand of hi-pot test outputs of transformer wire 2.5mm
what will happen if delta - star , 400V to 6.6KV step up transformer neutral is not grounded, Neutral is not used but transformer is provided with neutral.
On the transformer breather at what length should i change my sililca gel.
Civil Engineering (5086)
Mechanical Engineering (4453)
Electrical Engineering (16638)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)