The LJWD-10.12 Oil-Immersed High Voltage Current Transformer is a steel-tank, oil-immersed device designed for 10kV and 12kV AC power systems (50Hz/60Hz). It is widely used for current measurement, energy metering, and relay protection in urban and rural power grids, substations, and industrial transformer stations. Built for reliability, it can operate continuously at 120% of rated current, withstand harsh outdoor conditions, and deliver long-term stable performance at altitudes up to 4000m and ambient temperatures from -25°C to +40°C.
Service conditon ·Installation: Indoor & outdoor ·Temperature: -25°C to +40°C ·Humidity: ≤95% relative humidity ·Altitude: ≤2000m (customizable up to 4000m) ·Pollution Class: Class II Construction & Features ·Oil Tank Design: Waterproof & snowproof cover, oiling valve, and diaphragm to reduce oxidation and extend service life. ·Vacuum Oil Treatment: Vacuum oil-filtering and oil-injection improve insulation and cooling efficiency. ·Thermal Stability: 187.5 times enhanced thermal stability for demanding power systems. ·Flexible Configurations: ·Single/Double secondary winding ·Single/Double ratio options ·Accuracy Classes: 0.2, 0.5, 1.3 (D) for both measurement and protection.
Technical Parameters ·Rated Primary Current: 5A – 1500A ·Rated Secondary Current: 5A ·Accuracy Class: 0.2, 0.5, 3 (customizable combinations) ·Rated Short-Time Thermal Current: Up to 30kA ·Rated Dynamic Current: Up to 50kA ·Rated Insulation Level: 12/42/75kV ·Standards: GB1208-1997, IEC standards
Technical Parameters Table 1
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Class
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Hz
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Current Ratio (A)
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Secondary Capacity (kA)
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Primary Voltage (kV)
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Primary Current & Rated Current (%)
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Max.Error
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Load Situation
|
|
Ratio error%
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difference (min)
|
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0.5 3 D
|
50
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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
|
20
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±0.75 ±0.5
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±50 ±40
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not be smaller than 15 ohms within the rated capacity range of 25%-100%. 2. The load power factor is Cosφ = 0.8.
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Technical Parameters Table 2
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Type
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Class (KV)
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Ratio (A)
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0.2 Capacity (VA)
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Continuous Protection
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Weight (kg)
|
|
LJW-10,12
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11,12
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5 – 400/5
|
10 – 15
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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 & Dimensions
·Compact single-phase, oil-immersed design for easy installation. ·Equipped with grounding bolts, oil level monitoring, and drain plug. ·Customizable tank dimensions and mounting options.
Customization & Support
We provide OEM / ODM customization. Please specify: ·Model & Current Ratio (e.g., LJWD-10, LJWD-12, 200/5A, 400/5A) ·Accuracy Class & Output (e.g., 0.2, 0.5, 3; 10–30VA) ·Insulation Level & Service Conditions (e.g., 12/42/75kV; temperature, altitude, pollution class) ·Additional Requirements (e.g., single/double secondary winding, grounding, customized tank design)