Product Overview
The LJW-10 oil-immersed, steel-enclosed outdoor current transformer is designed for 10kV power systems operating at 50Hz. It provides accurate current measurement, energy metering, and relay protection in outdoor switchgear environments. The elliptical oil tank and steel enclosure offer robust insulation and mechanical protection.
Product Type
| Item | Specification |
|---|---|
| Product name | Oil-immersed, steel-enclosed outdoor current transformer |
| Model series | LJW-10, LJWD-12, LJW-13.8kV |
| Structure | Elliptical oil tank, steel enclosure, ring-type cores with secondary windings |
| Voltage class | 10kV |
| Rated frequency | 50Hz |
| Secondary current | 1A or 5A |
| Installation | Outdoor |
| Applications | Current measurement, energy metering, feeder monitoring, relay protection |
Product Display
Features
- Oil-immersed with 25# transformer oil for insulation
- Multiple secondary windings per ring-type core for metering and protection
- Multi-ratio options and primary/secondary tap configurations
- Robust steel enclosure for outdoor installation
- High accuracy classes: 0.2S, 0.5S, 0.2, 0.5, 1.0 for metering; 5P10, 10P20 for protectio
Model Designation
- Outdoor location, -25°C to +40°C, humidity ≤85%
- Altitude ≤4000m
- Primary terminals marked P1/P2, secondary terminals S1/S2
- Do not open secondary circuit when energized
Installation
Selection Table
| Rated
Current Ratio (A) |
Accuracy
Class Combination |
Rated
Output (VA) |
FS | ALF | 1s Short-Time
Thermal Current |
Rated
Dynamic Current |
|---|---|---|---|---|---|---|
| 150/1 | 5P10, 10P20 | 10VA | 5 | 10 | 150×I1n | 375×I1n |
| 200/1 | 5P10, 10P20 | 10VA | 5 | 10 | 180×I1n | 400×I1n |
| 300/1 | 5P10, 10P20 | 15VA | 5 | 10 | 200×I1n | 450×I1n |
FAQs
For current measurement, energy metering, and relay protection in outdoor 10kV systems.
Select rated current 70%-90% of expected operating current to ensure measurement and protection accuracy.
Metering: 0.2S, 0.5S, 0.2, 0.5, 1.0; Protection: 5P10, 10P20.
Through primary or secondary tap structures; each core can support multiple secondary windings.
Outdoor, -25°C to +40°C, humidity ≤85%, altitude ≤4000m, free from corrosive gases.
Do not open secondary circuit under primary voltage; check polarity and grounding.
Yes, each secondary winding can be configured for metering or protection according to project requirements.