Sub Station Abstract- (Part-3)
March 18, 2014 11 Comments
Electrical Wire Ground Clearance:
-
Ground Clearance in Meter = 5.812 + 0.305 X K
- Where K= (Volt-33) / 33
| Voltage Level | Ground Clearance |
| <=33KV | 5.2 Meter |
| 66KV | 5.49 Meter |
| 132KV | 6.10 Meter |
| 220KV | 7.0 Meter |
| 400KV | 8.84 Meter |
Overhead Conductor /Cable Size:
|
Voltage |
Overhead Conductor |
Cable Size |
| 33 KV | ACSR-Panther/Wolf/Dog , AAAC | 150,185,300,400,240 mm2 Cable |
| 11 KV | ACSR-Dog/Recon/Rabbit , AAAC | 120, 150,185,300 mm2 Cable |
| LT | ACSR-Dog/Recon/Rabbit , AAC,AAAC | 95,120, 150,185,300 mm2 Cable |
Transmission / Distribution Line:
|
Span |
Height of Tower |
|
400KV=400 Meter |
400KV=30Meter (Base 8.8 Meter) |
|
220KV=350 Meter |
220KV=23Meter (Base 5.2 Meter) |
|
132KV=335 Meter |
220KV Double Circuit=28 Meter |
|
66KV=210 Meter |
66KV=13Meter |
|
Conductor Ampere |
Voltage wise Conductor |
|
Dog=300Amp |
400KV=Moose ACSR=500MVA Load |
|
Panther=514Amp |
220KV=Zebra ACSR=200MVA Load |
|
Zebra=720Amp |
132KV=Panther ACSR=75MVA Load |
|
Rabbit=208Amp |
66KV=Dog ACSR=50MVA Load |
|
Moose=218Amp |
|
Type of Tower:
|
Type |
Used |
Angle/Deviation |
|
A |
Suspension Tower | Up to 2° |
|
B |
Small Angle Tower | 2° to 15° |
|
C |
Medium Angle Tower | 15° to 30° |
|
D |
Large Angle / Dead End Tower | 30° to 60° & Dead End |
Tower Swing Angle Clearance (Metal Part to Live Part):
|
Swing Angle |
Live Part to Metal Part Clearance (mm) |
|||
|
66KV |
132KV |
220KV |
400KV |
|
|
0° |
915mm |
1530mm |
2130mm |
3050mm |
|
15° |
915mm |
1530mm |
2130mm |
– |
|
22° |
– |
– |
– |
3050mm |
|
30° |
760mm |
1370mm |
1830mm |
– |
|
44° |
– |
– |
– |
1860mm |
|
44° |
610mm |
1220mm |
1675mm |
– |
Corona Ring Size:
|
Voltage |
Size |
| <170 KV | 160mm Ring put at HV end |
| >170 KV | 350mm Ring put at HV end |
| >275 KV | 450mm Ring put at HV end & 350 mm Ring put at Earth end |
Span of Transmission Line (Central Electricity Authority):
|
Voltage |
Normal Span |
|
765 KV |
400 to 450 Meter |
|
400 KV |
400 Meter |
|
220 KV |
335,350,375 Meter |
|
132 KV |
315,325,335 Meter |
|
66 KV |
240,250,275 Meter |
JIGNESH PARMAR
THANK YOU SO MUCH SIR… THANK U FOR UE VALUABLE HELP….
Your work gives so much precious knowledge to the whole electrical engineers who are freshers or with lack of practical knowledge..
Thanks for such a compact valuable information.
thank you sir
Hi.
I tried to buy the electrical software but in the countries of paypall there is no lebanon country the system refuse the credit card.
What should I do?
Thanks! to send me notes & articles.but my feiled is distrybution transformer if related my job notes pl send me
Please I have a 300kvar capacitor bank for a 800kva transformer.
What would be the implication of the voltage raise to the Factory electrical systems
and operations? Help please
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Dear Sir,
Thank you very much for these valuable technical information.
Regards, Ahmad H. Al-Sheikh Power System Engineer. Saudi Arabia
if we by mistaken extra capacitor in circuits .circuit voltage and transformer voltage level rise at that time problem will occur .right sir?
Plz send me mail related variable frequency drive
thank for your guidance