10kV Differential Protection Current Transformer
This 10kV current transformer is specially designed for differential protection applications in medium-voltage power systems.
Built with an enhanced structure and resin-cast insulation, the transformer ensures high accuracy, strong dielectric strength, and long-term operational reliability.
It is suitable for use in switchgear, protection relays, industrial power distribution equipment, and 10kV control systems.
Product Overview
Differential protection requires precise, stable, and synchronized current measurement across multiple power equipment.
This enhanced 10kV differential protection CT delivers excellent linearity, strong withstand capacity, and fast response performance.
The cast resin insulation provides outstanding moisture resistance, thermal endurance, and mechanical stability, making it ideal for demanding environments.
Key Features
- Rated voltage: 10kV
- Designed specifically for differential protection (差动保护)
- Enhanced structural design with higher safety margin
- Epoxy resin cast insulation with excellent dielectric properties
- Reliable metering and protection accuracy
- High thermal and mechanical strength
- Long service life and low partial discharge
Technical Data
| Rated primary current | Accurate level combination | Rated output | Rated output | Rated dynamic stable current | ||||
| 0.2S | 0.2 | 0.5 | 10P10 | 10P15 | ||||
| 5-100 | 0.2S/0.2S 0.2/0.2 0.2S/10P10 0.2/10P10 0.5/10P10 0.2/10P15 0.5/10815 |
10 | 10 | 10 | 15 | 100 lln | 250 lln | |
| 150 | 15 | 13.5 | 34 | |||||
| 200 | 18 | 45 | ||||||
| 300 | 27 | 67.5 | ||||||
| 400 | 36 | 90 | ||||||
| 500 | 45 | 112.5 | ||||||
| 600 | 45 | 112.5 | ||||||
| 750 | 20 | 63 | 130 | |||||
| 800-1000 | 63 | 1300 | ||||||
Applications
- 10kV medium-voltage switchgear
- Differential protection systems for feeders or transformers
- Industrial distribution cabinets
- Power plant and substation relay protection
- Metering and current monitoring circuits
Technical Advantages
- High accuracy suitable for precise differential relay operation
- Stable performance under varying system load conditions
- Resin-cast structure resists humidity, dust, and pollution
- Compact enhanced design for limited switchgear space
- Strong impulse withstand and dynamic current capability
Construction & Design
The transformer features robust copper terminals, clear P1/P2 polarity markings, and a reinforced mounting base for firm installation.
Its square resin housing ensures uniform insulation thickness, reduced partial discharge, and stable long-term performance.
This enhanced CT is suitable for environments requiring both reliability and high protection sensitivity.
Installation Notes
- Install vertically on a flat metal mounting plate
- Ensure correct polarity alignment (P1 → incoming, P2 → outgoing)
- Avoid installation near heat sources or high-vibration areas
- Keep insulation surfaces clean to maintain dielectric strength
- Connect secondary circuits to protection relays as per system design
Why Choose This Differential Protection CT?
- Perfect for medium-voltage differential protection schemes
- High reliability and fast relay cooperation
- Excellent long-term stability and low maintenance
- Enhanced design ensures higher safety and performance margin
- Solid insulation structure supports harsh industrial conditions
