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LB current transformer
It is outdoor, single phase and oil-immersed hair-pin type current transformer, which is used for metering and relay protection of 66kv, 110/132kv, 220kv 50/60Hz. Please contact us! Email:
liujing@mec.com.cn
Description
Email: liujing@mec.com.cn
Skype:liujingmec
MSN:lijing_0612@126.com
It is outdoor, single phase and oil-immersed hair-pin type current transformer, which is used for metering and relay protection of 66kv, 110/132kv, 220kv 50/60Hz.
It is oil/paper insulation system, the primary insulation is wound from high voltage cable paper, and is placed several capacitor screen of voltage division in the primary insulation, which can improve electric field distributing and decrease the consumption of the insulation material. It will be immersed with transformer oil after desiccating vacuum. It has advantages of stable and reliable performance of insulation, rich successful experience, a long life time and convenient maintenance.
Perfect fluidity performance of transformer oil is good for heat dissipation. It also has self recover ability for the failure of partial discharge caused by air bubble and dust.
|
Item
|
Unit
|
LB5-66
|
LB6-110
|
LB7-220
|
|
Rated voltage
|
kV
|
66
|
110/132
|
220
|
|
Highest voltage
|
kV
|
72.5
|
126/145
|
252
|
|
Rated frequency
|
Hz
|
50/60
|
50/60
|
50/60
|
|
Rated transformation ritio
|
|
2×25～2×1000/5 or 1A
|
2×30～2×1000/5 or 1A
|
2×300～2×1000/5 or 1A
|
|
Number of secondary windings
|
|
1～5
|
1～6
|
1～8
|
|
Accuracy of measuring winding
|
|
0.2 0.2S 0.5 0.5S
|
0.2 0.2S 0.5 0.5S
|
0.2 0.2S 0.5 0.5S
|
|
Accuracy of protection winding
|
|
5P or 10P
|
5P or 10P
|
5P or 10P
|
|
Rated secondary output
|
VA
|
20～50
|
20～50
|
20～50
|
|
Creepage distance
|
mm
|
W1/1500
W2/1820
W3/2250
|
W1/2760
W2/3150
W3/3906
|
W1/5040
W2/6300
W3/7812
|
|
Power frequency withstand voltage
|
rms
|
140
|
185(230)(275)
|
395(460)
|
|
Lightning impulse withstand voltage
|
rms
|
325
|
450(550)(650)
|
950(1050)
|
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