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LZZBJ4-35 current transformer
LZZBJ4-35 type current transformer is suitable for electrical measurement and protection in ZW7-40.5 type vacuum circuit breaker for outdoor equipment of power system with rated frequency of 50Hz and rated voltage of 35kV. The product has a single variable ratio, polytropic ratio, multiple secondary (2. three and four secondary) high dynamic thermal stability, high precision, large capacity and other characteristics, divided into epoxy resin casting semi-closed and fully closed two structures.
Classification:
Current transformer
Key words:
transformer
Product Description
1. Overview:
LZZBJ4-35 type current transformer is suitable for electrical measurement and protection in ZW7-40.5 type vacuum circuit breaker for outdoor equipment of power system with rated frequency of 50Hz and rated voltage of 35kV. The product has a single variable ratio, polytropic ratio, multiple secondary (2. three and four secondary) high dynamic thermal stability, high precision, large capacity and other characteristics, divided into epoxy resin casting semi-closed and fully closed two structures.
2. conditions of use:
The ambient temperature is -5 ℃ ~ 40 ℃, the altitude is not more than 1000 meters, and there is no serious pollution area in the atmosphere.
3. technical parameters:
1. Power factor of load COS φ = 0.8 (hysteresis)
2. Rated insulation level: 40.5/95/185kV
3. Rated secondary current: 5A or 1A
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Rated current ratio
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Accurate grade and rated output (VA)
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Rated short time
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Rated dynamic stability
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Total weight
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| Product Model
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（A）
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Level Combinations
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Accuracy class and rated output
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Thermal current
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constant current
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（kg）
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| Type
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Rated Current
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Class combination
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(Ka)
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(Ka)
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Total
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| 0.2S
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0.2
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0.5
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10P
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ratio
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Ith
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Idyn
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weight
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50~150/5
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60Iin
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150Iin
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0.2S/0.5/10P10/10P10
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200/5
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12
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30
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0.2S/0.5/10P15/10P15
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300~500/5
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20
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50
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| LZZBJ4-35
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0.2/0.5/10P10/10P10
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20
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20
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20
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30
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| 600~800/5
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31.5
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78.75
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0.2/0.5/10P15/10P15
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1000~1250/5
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40
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100
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0.2/10P10/10P10/10P10
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1500~1600/5
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50
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125
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Note:
1. The first item of each gear below the rated current of the multi-variable ratio current transformer is designed to be 600 ampere turns, such as 50-70-100/5
The ampere turns of each gear are 600-900-1200IN respectively.
2. Grade 0.2S: 15VA for 600-800IN and 20VA for 800IN and above. 0.2 grade: 600-800IN is 20VA, more than 800IN is 30VA. 0.5 grade: 30VA for 600-800IN, 50VA for 800IN and above. 10P10 grade: 30VA for 600-800IN, 50VA for 800IN and above. 10P15 grade: 20VA for 600-800IN, 30VA for 800IN and above.
The rated output in the table only lists the first data of each specification of the polytropic ratio. 3. The difference between the two gears before and after the current transformer is less than or equal to 2 times.
Such as 100-150-200/5,300-400-500/5, etc.
4. Only single transformation ratios are produced below 50/5, such as 30/5,40/5, etc.
4. installation dimensions:
5. Ordering Instructions:
When ordering, the product model, rated current ratio, accurate level combination and corresponding rated output, rated short-time current, etc. shall be provided. For special orders can be negotiated with the factory to resolve.
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