LZW series current transformers are suitable for installation on the three-phase outlet of 10Kv on-column switches. They can measure and protect zero-sequence and three-phase currents. According to user requirements, products with different levels of different ratios can be provided.
The core of the zero sequence and measuring winding uses a new magnetically permeable material (ultra-microcrystalline material), which has high magnetic permeability, low magnetic induction, and excellent stability, ensuring high measurement accuracy of the transformer. The core of the protective winding is processed by advanced technology using high-quality imported silicon steel sheets to ensure a high accuracy limit coefficient. Silicone rubber is used as the main insulation material, which has excellent insulation, water repellency and aging resistance; high-quality epoxy resin is used between the winding and the main insulation, and between the winding and the winding to ensure the primary winding and the secondary winding. High insulation between different windings, stable product performance and no maintenance.
Dimensions:
The rated current ratio, accuracy level and rated load are shown in the following table:
Current transformers with different specifications and parameters can be customized according to user requirements
|
MODEL
|
LSZ255-25
|
|
Rated primary current
|
Single winding accuracy and rated load (VA)
|
Double winding composite accuracy and rated load (VA)
|
|
0.2S
|
0.2
|
0.5
|
10P20
|
10P10
|
10P
|
0.2S
|
0.5
|
10P20
|
10P10
|
10P
|
|
50
|
|
|
2.5
|
|
|
2.5
|
|
2.5
|
|
2.5
|
5
|
|
75
|
|
|
2.5
|
|
|
2.5
|
|
2.5
|
|
2.5
|
5
|
|
100
|
|
|
5
|
|
|
5
|
|
2.5
|
|
2.5
|
5
|
|
150
|
|
|
5
|
|
|
5
|
|
5
|
|
5
|
7.5
|
|
200
|
2.5
|
3.75
|
5
|
2.5
|
3.75
|
5
|
2.5
|
5
|
2.5
|
5
|
10
|
|
300
|
5
|
5
|
7.5
|
2.5
|
5
|
7.5
|
2.5
|
5
|
2.5
|
5
|
10
|
|
400
|
5
|
7.5
|
10
|
3.75
|
5
|
10
|
5
|
10
|
5
|
10
|
15
|
|
500
|
10
|
10
|
15
|
5
|
7.5
|
15
|
5
|
10
|
5
|
10
|
15
|
|
600
|
10
|
10
|
15
|
5
|
10
|
15
|
10
|
15
|
5
|
10
|
15
|
|
800
|
10
|
10
|
15
|
5
|
10
|
15
|
10
|
15
|
5
|
10
|
15
|
|
usage
|
Zero sequence winding
|
|
Current ratio I1 / I2
|
Accuracy and rated load (VA)
|
|
3
|
10P
|
|
20/1
|
0.5
|
0.5
|
|
30/1
|
0.5
|
0.5
|
|
50/1
|
0.5
|
0.5
|
|
100/1
|
1
|
1
|
|
50/5
|
1.5
|
1.5
|
|
75/5
|
2.5
|
2.5
|
|
100/5
|
2.5
|
2.5
|
|
150/5
|
2.5
|
2.5
|
Technical parameters： Conditions:
Rated frequency：50Hz/ 60Hz；， Ambient temperature：-35℃—+65℃
Rated secondary current：5A/ 1A； Daily average temperature：≤40℃。
Power frequency withstand voltage 42Kv/ 1min; altitude:≤1000m
Rated expansion current：120%In； atmospheric conditions：no serious pollution in the atmosphere
Executive standard： GB1208-2006。
Wiring schematic: