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- COFEKA CIA. LIMITADA
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>>Current Transformer & Potential Transformer >>High Voltage Transformer >>LVQB SF6 Insulated Current Transformer
LVQB SF6 Insulated Current Transformer
Summary
The enclosure, locating at the top, could be divided into “T” shape and “bell-cover” shape. T shaped enclosure is made of anticorrosive aluminum; Bell-cover enclosure is made of casting aluminum. The enclosure is checked by intensity and gas sealing and X ray.
The main body (primary winding and secondary winding) is fixed in the enclosure. SF6 is adopted as the insulating medium between the primary winding and secondary winding in which has the shield tube supported by epoxy resin for the secondary winding. The outgoing line for the secondary winding is lead to the connection box in pedestal through down-lead tube.
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Summary
The enclosure, locating at the top, could be divided into “T” shape and “bell-cover” shape. T shaped enclosure is made of anticorrosive aluminum; Bell-cover enclosure is made of casting aluminum. The enclosure is checked by intensity and gas sealing and X ray.
The main body (primary winding and secondary winding) is fixed in the enclosure. SF6 is adopted as the insulating medium between the primary winding and secondary winding in which has the shield tube supported by epoxy resin for the secondary winding. The outgoing line for the secondary winding is lead to the connection box in pedestal through down-lead tube.
Working condition:
Ambient temperature
maximum: +40°C
average temperature in a day: +30°C
minimum: -30°C(-40°C is available for particular order)
Height above sea level
within 1000 meters, while 3000 meters is the maximum for the altiplano-style
Air condition
There should be no heavily corrosive gas, no inflammable and explosive material;
Seismic intensity: 8 degree
Velocity: within 35m/s
Installation place: outdoor or indoor.
Main Technical Parameters
Type
designate
LVQB-35
LVQB-66/110
LVQB-220
LVQBT-500
Structure
T
shape
Bell-cover
shape
T
shape
Bell-cover
shape
T
shape
Bell-cover
shape
Bell-cover
shape
Rated
voltage kV
35
66/110
220
500
Maximum
voltage kV
40.5
72.5/126
252
550
Rated
frequency Hz
50
50
50
50
Short-time
power frequency withstand kV
95
160/230
460
740
Lightening
full wave impulse voltage kV
200
350/550
950/1050
1550/1675
Partial
discharge pC
<5
<5
<5
<5
Rated
primary current
50-2000
50-3000
100-3000
600-5000
Rated
secondary current
5 or
1
5 or
1
5 or1
1
Accuracy class
0.2s;0.2
0.2s;0.2
0.2s;0.2
0.2s;0.2
0.5s;0.5
0.5s;0.5
0.5s;0.5
0.5s;0.5
5P;10P
5P;10P
5P;10P;TPY
5P;10P;TPY
Rated
output VA
10-60
10-60
10-60
10-60
Meter
protection factor FS
5;10
5;10
5;10
5;10
Accuracy limit factor
10;15;20;25;30
Short-time
hot stability current kA/s
12.5-31.5/1
31.5-50/3
31.5-50/3
50-63/3
Rated
dynamic stability current kA
31.5-125
80-125
80-125
125-160
SF6
rated pressure (20掳C) Mpa
0.4
0.4
0.4
0.5
SF6
filling pressure (20掳C) Mpa
0.35
0.35
0.35
0.45
SF6
annual leakage %
<0.5
<0.5
<0.5
<0.5
SF6
moist content ppm
<150
<150
<150
<150
Outline dimension
A1
mm
1125/1250
2195
3600/3770
6695
A2 mm
610/570
1064
Max
1300/1440
2073
A3 mm
960/1000
1900
3180/3240
5913
Pedestal mounting hole dimension
4-φd1
4-φ22
4-φ22
4-φ22
4-φ26
B1XB2 mm
430X330
550X450
780X640
940X940
Primary connection board dimension
C1
mm
/30
50
50
C2 mm
/10
15
20
C3 mm
/50
80
80
4-φd2
4-φ9
4-φ18
4-φ18
Weight kg
100
400-500
900-1200
2300
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