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Year Established:2013

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  • LB1 current transformer

LB1 current transformer

It is outdoor, single phase and oil-immersed top-head type current transformer, which is used for metering and relay protection of 66kv, 110kv, 50/60Hz. Please contact us! Email:

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Email: liujing@mec.com.cn
Skype:liujingmec
MSN:lijing_0612@126.com
 
It is top-head oil/paper insulation type product, 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.
 
Primary winding is of penetrating type conducting rod structure, hence improves the product’s endurance against the short circuit current, maximum short-time withstand current reaches 63KA/3s(In case of series connection of primary winding)
 
Item
Unit
LVB1-66
LVB1-110
Rated voltage
kV
66
110
Highest voltage
kV
72.5
126
Rated frequency
Hz
50/60
50/60
Rated transformation ritio
 
2×200~2×2000/5 or 1A
2×200~2×3000/5 or 1A
Number of secondary windings
 
1~5
1~6
Accuracy of measuring winding
 
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
Rated secondary output
VA
10~50
20~50
Creepage distance
mm
W1/1500
W2/1820
W3/2250
W1/2760
W2/3150
W3/3906
Power frequency withstand voltage
rms
140
185(230)
Lightning impulse withstand voltage
rms
325