Primary and Secondary Fusion Current Transformer
Product Model
Technical Parameters
|
Rated primary current |
Rated secondary current |
Rated secondary output |
|||
|
0.2 |
0.5 |
10P5 |
10P10 |
||
|
200 |
5(1) |
|
2.5 |
1.5 |
0.75 |
|
400 |
|
3.75 |
3.75 |
2.5 |
|
|
600 |
|
5 |
10 |
5 |
|
|
Zero sequence:20 |
1 |
|
|
0.5 |
|
|
50 |
|
|
1.0 |
|
|
|
100 |
|
|
1.0 |
||
Outline Dimension
Wiring Principle Diagram
Product Functions
This transformer integrates multiple critical functions: it provides precise current transformation for system protection with three adjustable ratios, incorporates a dedicated zero-sequence winding for ground fault detection (5%-120% range ≤ Grade 3, 500% ≤ 10%), and delivers highly accurate 0.5-class measurement from its three-phase protection winding. It seamlessly merges primary equipment (switchgear) and secondary systems, enabling direct data acquisition for smart grids while ensuring reliable insulation coordination and electrical safety at the switch interface.
Applicable Environment
This product is specifically engineered for outdoor medium-voltage power distribution networks. Its primary application is for integration with or retrofit of ZW32-10 series outdoor vacuum circuit breakers. The anti-UV and anti-aging exterior insulation makes it suitable for harsh environmental conditions. It is ideal for grid upgrades, smart substation projects, and any scenario requiring a compact, fused primary-secondary design for reliable current monitoring and protection.
Product Highlights
◆Patented Fusion Design: Unique integration of primary and secondary systems, simplifying structure and enhancing reliability.
◆Advanced Dual Insulation: Exterior methyl vinyl silicone rubber for weathering resistance; interior epoxy resin for robust winding fixation and moisture protection.
◆Multifunctional Windings: Single three-phase winding concurrently serves high-accuracy (0.5 class) measurement and protection functions, with an independent zero-sequence fault detection coil.
◆Enhanced Interface Reliability: Specially reinforced insulation at the switch butt-joint guarantees withstand voltage and lightning impulse performance per national standards.
◆Flexible Configuration: Offers three protection ratios to accommodate various system requirements, with support for customization.
Installation Instructions
This CT is designed for direct integration with ZW32-10 circuit breakers. During ordering, users must specify the single-pole supply voltage, power, and power supply phase sequence (supply code: LJ-ZW32-10). Installation involves securely mounting the unit onto the designated switch interface, ensuring proper electrical connection and mechanical alignment as per the integration design. For non-standard applications or special technical requirements, consult the manufacturer directly to discuss customization and specific installation protocols prior to procurement.