LJ-ZW3-10(12), LJ-ZW43 Zero-Sequence Protection Current Transforme
The LJ-ZW43-10(12) Zero-Sequence Protection Current Transformer is specifically engineered for 10kV and 12kV AC distribution systems with a rated frequency of 50Hz. It is primarily utilized with ZW2 and ZW43 air switches for three-phase current protection and measurement. Built using advanced superconducting magnetic materials, the transformer fulfills the dual requirements of high precision and high […]
The LJ-ZW43-10(12) Zero-Sequence Protection Current Transformer is specifically engineered for 10kV and 12kV AC distribution systems with a rated frequency of 50Hz. It is primarily utilized with ZW2 and ZW43 air switches for three-phase current protection and measurement. Built using advanced superconducting magnetic materials, the transformer fulfills the dual requirements of high precision and high capacity. Encased in durable silicone rubber insulation, it provides exceptional resistance to extreme temperatures, corrosion, UV radiation, and aging. This design ensures long-term reliability, durability, and maintenance-free operation.
LJ-ZW3-10(12), LJ-ZW43 Type designation
The Key Features and Structure of LJ-ZW3-10(12) and LJ-ZW43-10(12) Current Transformers:
L: Current Transformer.
J: Zero-Sequence Current measurement.
ZW3, ZW43: Specifically designed for ZW3 and ZW43 vacuum circuit breaker models.
10, 12: Rated voltage for 10kV and 12kV power systems.
This designation highlights the LJ-ZW3-10(12) and LJ-ZW43-10(12) Current Transformers’ compatibility with ZW3 and ZW43 vacuum circuit breakers, showcasing their ability to accurately measure zero-sequence current and deliver advanced protection for modern power systems.
Service condition of LJ-ZW3-10(12), LJ-ZW43 CT
- Ambient Temperature: -25°C to +40°C
- Altitude: ≤2000m
- Average Daily Temperature: ≤40°C
- Pollution Level: Class II
Ensure the LJ-ZW43-10(12) and LJ-ZW3 series Zero-Sequence Integrated Current Transformers are installed correctly to achieve optimal performance and reliability.
LJ-ZW3-10(12), LJ-ZW43 CT Technical Parameters
The LJ-ZW43-10(12) Zero-Sequence Protection Current Transformers are advanced zero-sequence integrated devices designed for 10kV and 12kV power systems. Supporting primary currents from 20A to 1200A and secondary currents of 5A (optional 1A), these transformers deliver precise current measurement, reliable relay protection, and integrated zero-sequence grounding functionality. With a 5P10 accuracy class, rated outputs of 2.5VA to 40VA, and an insulation level of 10(12)/42kV, they ensure high accuracy and consistent performance. Featuring a compact, lightweight design, these transformers are ideal for modern intelligent power systems, offering versatile applications in current measurement, energy metering, relay protection, and enhanced zero-sequence safety.
| Type | Rated Primary Current (A) | Assigning Combination | Rated
Secondary Current (A) |
Accurate and Rated Output (VA) | The Rated Insulation
Level (kV) |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.2S(0.5) | 10P(5P) | 5P20 | |||||||||
| LZW32-10(12)
LZW43-10(12) |
50, 75, 100 | 5P(10P) | 5(1) | 1 | 1.5 | 2.5 | 10(12)/42 | ||||
| 100, 150, 200 | 5 | 5 | 10 | 2.5 | 3.75 | 5 | |||||
| 100, 200, 300 | 10P20 | 5 | 10 | 15 | 2.5 | 5 | 7.5 | ||||
| 200, 300, 400 | 0.2S/10P
0.5/10P 0.2S/5P20 0.5/5P20 |
10 | 10 | 15 | 5 | 7.5 | 10 | ||||
| 200, 400, 600 | 10 | 15 | 20 | 5 | 10 | 15 | |||||
| 400, 600, 800 | 15 | 20 | 30 | 10 | 15 | 20 | |||||
| 600, 800, 1200 | 20 | 30 | 40 | 15 | 20 | 25 | |||||
| 800, 1000, 1200 | 30 | 40 | 50 | 20 | 30 | 40 | |||||
| Zero Sequence | 20 | 10P 3 Level | 1 | 0.1Ω | |||||||
| 50 | 10P 1 Level | 0.2Ω | |||||||||
Customization:
- Tailored Solutions: We provide customized designs, including special specifications or high-precision configurations, to meet unique operational needs.
- Single Ratio Operation: During usage, only one ratio of the current transformer can be utilized; multiple ratios cannot function simultaneously.
- Patented Technology: Engineered with advanced patented technology, these transformers support A, B, C phase protection and zero-sequence grounding protection, offering a compact, lightweight, and highly efficient solution for modern power systems.
Contact us to create a solution customized to your specific power system requirements!
Outline and Dimensions of Installation
The LJ-ZW43-10(12) Zero-Sequence Current Transformer Outline and Dimensions of Installation
Note: This page provides comprehensive details about the LZW32-10(12) and LZW43-10(12) zero-sequence integrated Current Transformers, including technical specifications, accuracy, and installation guidelines. For assistance with model selection or to explore customized solutions tailored to your specific requirements, please contact our expert team for support.
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