LJWD-10.12 Oil-Immersed High Voltage Current Transformer
LJWD-10.12 Oil-Immersed High Voltage Current Transformer Overview The LJWD-10.12 High Voltage Current Transformer is a steel tank, oil-immersed device designed for use in 10kV power systems. Suitable for both indoor and outdoor applications in 50Hz systems, it supports current measurement, energy metering, and relay protection. With the ability to operate continuously at 120% of its […]
LJWD-10.12 Oil-Immersed High Voltage Current Transformer Overview
The LJWD-10.12 High Voltage Current Transformer is a steel tank, oil-immersed device designed for use in 10kV power systems. Suitable for both indoor and outdoor applications in 50Hz systems, it supports current measurement, energy metering, and relay protection. With the ability to operate continuously at 120% of its rated current, it is built to perform reliably at altitudes up to 4000m and in ambient temperatures ranging from -25°C to +40°C, making it ideal for diverse and demanding environments.
LJWD-10.12 Current Transformer Type designation
The Key Features and Structure of LJWD-10.12 Current Transformer:
- L: Represents “Current Transformer.”
- J: Indicates “Steel Tank Oil-Immersed Type,” offering enhanced durability and insulation.
- W: Signifies suitability for both outdoor and indoor applications.
- D: Denotes Continuous Protection Control:
- With “D”: Double secondary winding.
- Without “D”: Single secondary winding.
- 10, 12: The rated voltage, indicating compatibility with 10kV or 12kV power systems.
This designation provides a clear understanding of the LJWD-10.12 Current Transformer, highlighting its technical features, structural characteristics, and suitability for diverse power system environments.
LJWD-10.12 Current Transformer Service conditon
- Location: Indoor and outdoor use.
- Temperature: -25°C to +40°C.
- Humidity: Max relative humidity 95%.
- Altitude: ≤2000m.
- Pollution Level: Class II.
Designed for reliable performance in diverse environments.
LJW-10, LJWD-12 oil-immersed CT Construction
The LJWD Oil-Immersed Current Transformer is a single-phase, self-cooling type suitable for both indoor and outdoor use. It employs advanced vacuum oil-filtering and oil-injection techniques to enhance cooling and insulation performance.
Key Features:
- Oil Tank Design:
- Equipped with an oiling valve and waterproof/snowproof cover for environmental protection.
- An internal diaphragm isolates the oil from air, reducing oxidation and extending service life.
- Thermal Stability: Engineered with a thermal stability factor of 187.5 times, ensuring reliability under demanding conditions.
- Configuration Options:
- Single-ratio with single secondary winding.
- Single-ratio with double secondary winding.
- Double-ratio with single secondary winding.
- Double-ratio with double secondary winding.
- CT Classes: Class 0.2: For measurement. Class 0.5 and 1.3 (D): For continuous protection and control.
This robust construction ensures exceptional durability and consistent performance, making it suitable for various 10kV and 35kV power systems.
LJWD-10 oil-immersed CT Technical Parameters
The LJWD-10.12 Oil-Immersed Current Transformer supports primary currents ranging from 5A to 1500A, with secondary configurations available for both single and double windings. It offers multiple accuracy classes, including 0.2, 0.5, and 3, ensuring precise measurement and protection. With a rated secondary capacity of up to 15kA, a short-time thermal current of up to 30kA, and a dynamic current of up to 50kA, this transformer delivers stable and reliable performance in 10kV and 12kV power systems, meeting the demands of diverse and challenging environments.
Technical Parameters Table 1
| Accuracy Class | Frequency (Hz) | Rated Current Ratio (A) | Rated Secondary Capacity (kA) | Rated Primary Voltage (kV) | Ratio of Primary Current and the Rated Current (%) | Max.Error | Secondary Load Situation | |
|---|---|---|---|---|---|---|---|---|
| Ratio error % | Phase difference (min) | |||||||
| 0.2
0.5 3 D |
50 | 5/5, 15/5
30/5, 40/5 50/5, 75/5 100/5, 150/5 200/5, 300/5 400/5, 600/5 1000/5, 1500/5 |
15 | 10 | 10
20 |
±10
±0.75 ±0.5 |
±50
±50 ±40 |
· The load level should not be smaller than 15 ohms within the rated capacity range of 25%-100%.
· The load power factor is Cosφ = 0.8. |
Technical Parameters Table 2
| Type | Voltage Class (KV) | Rated Current Ratio (A) | Measurement Class 0.2 Capacity (VA) | Capacity for Class 1 Continuous Protection | Weight (kg) |
|---|---|---|---|---|---|
| LJW-10,12 | 11,12 | 5 – 400/5 | 10 – 15 | Without continuous protection Without monitoring | 21 |
| LJWD-10,12 | 11,12 | 5 – 400/5 | 10 – (15) | 15 – (30) | 28 |
Customization and Support: We provide tailored solutions for the LJWD-10.12 Oil-Immersed Current Transformer, including custom current ratios, accuracy classes, and output ratings to fit your specific requirements. Contact us to create a transformer designed for your operational needs.
Outline and Dimensions of Installation
LJW-10, LJWD-12 Outline and Dimensions of Installation
Note: This page provides detailed information about the LJWD-10.12 high voltage Oil-Immersed Current Transformer, including wiring diagrams, technical specifications, accuracy, and dimensions. For assistance with model selection or customized solutions for non-standard requirements, please contact our expert team.
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