10kV Current Transformer
This 10kV current transformer is designed for medium-voltage distribution systems and provides accurate current measurement and reliable protection functions.
The transformer core and secondary windings are fully encapsulated in epoxy resin, ensuring excellent insulation strength, long-term stability, and strong resistance to environmental conditions.
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Product Overview
The 10kV current transformer uses a post-type structure with a reinforced installation base, suitable for switchgear, ring main units, and industrial distribution cabinets.
Its precision design ensures stable performance under both metering and protection applications. The transformer is equipped with terminals P1, P2, and multiple secondary outputs for measurement and protective relays.
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Key Features
- Rated system voltage: 10kV
- Fully epoxy cast resin insulation for excellent dielectric properties
- Multiple secondary terminals (P1, P2, 1S1, 1S2) to support metering and protection
- High mechanical strength and stable thermal endurance
- Suitable for liquid-level line loop protection and medium-voltage control systems
- Base-mounted structure with four mounting holes
- Meets GB20840.2-2014 standards
Technical Specifications
- Rated insulation level: 12/42/75 kV
- Rated secondary current: 5A or 1A
- Power factor: cosφ = 0.8 (lagging, full load)
- Pollution level: Grade II
- Altitude: ≤1000m
- Standard compliance: GB20840.2-2014
Technical Data
| Rated current ratio | Precision level combination | Limit output | Rated short-time thermal current | Dynamic current |
| 5～300/5 | 0.2S/0.5 | 10/10 | 90inch/1S | 225inch |
| 400～500/5 | 0.2s/10P100.5/10P10 | 10/10-10/15 | 90inch/1S | 225inch |
| 600/5 | 0.5/10P10 | 10/15 | 60inch/2S | 150inch |
Applications
- 10kV medium-voltage switchgear
- Ring main units (RMU)
- Compact substations
- Industrial power distribution systems
- Metering and protection circuits
- Liquid-level feeder protection
Construction & Design
The transformer adopts a sealed epoxy resin cast body, which enhances mechanical strength and improves moisture resistance.
The top-mounted primary conductor and the robust mounting base ensure easy integration into various switchgear layouts.
The well-marked secondary terminals provide quick connection during installation and maintenance.
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Advantages
- High accuracy and stable performance
- Compact post-type design for limited switchgear space
- Excellent partial discharge resistance
- Maintenance-free solid insulation system
- Strong protection capability for relay circuits
Installation Notes
- Install vertically on flat metal surfaces using the four mounting holes.
- Ensure proper wiring of P1, P2 and secondary terminals according to system polarity.
- Avoid installation in areas with excessive vibration or corrosive gas.
- Regular external cleaning is recommended for optimal insulation performance.
