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Products Electrical & Grid Transformer Accessories
12-52kV FRP Capacitive Transformer Bushing (draw lead type)
Nominal voltage (kV)：10-52
Rated voltage (the highest voltage of the equipment) (kV)：12-52
Dry Frequency withstand voltage (kV/min)：30-105
Wet Frequency withstand voltage (kV/min)：28-95
Whole Wave Thunder impulse withstands voltage (kV)：75-250
Intercepted WaveThunder impulse withstands voltage (kV)：75-275
Maximum Dielectric dissipation factor： At 1.05Um, the lower limit should not be over 0.4%
Increment Dielectric dissipation factor： At 1.05Um, the variation to Um should not be over 0.1%
Test tap insulation level (kV/min)：3
Um Local discharge (pC): ≤10
1.05Um/√3 Local discharge (pC): ≤5
leakage test: 0.6MPa/20min without leakage
Thermal short-time current: 25 times the bushing rated current, the maximum is 100kA and lasts 2S
Outdoor creepage extender: 50
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DESCRIPTION

Detailed Parameters

Product Code BT101 BT105 BT201 BT205 BT301 BT205 BT305 BT307 BT401 BT404 BT405 BT408
Specification QXFBRGW-12/630-4 QXFBRGW-12/1250-4 QXFBRGW-24/630-4 QXFBRGW-24/1250-4 QXFBRGW-40.5/630-4 QXFBRGW-L-40.5/630-4 QXFBRGW-40.5/1250-4 QXFBRGW-L-40.5/1250-4 QXFBRGW-52/630-4 QXFBRGW-L-52/630-4 QXFBRGW-52/1250-4 QXFBRGW-L-52/1250-4
Total Length L 595 595 765 765 935 1184 935 1184 1115 1515 1115 1515
Air Wiring Terminal Hole Distance a1 40 40 40 40 40 40 40 40 40 40 40 40
Board Size a2*a3 80*80 80*80 80*80 80*80 80*80 80*80 80*80 80*80 80*80 80*80 80*80 80*80
Holes Number*Holes Diameter n1*Φd1 4*Φ14 4*Φ14 4*Φ14 4*Φ14 4*Φ14 4*Φ14 4*Φ14 4*Φ14 4*Φ14 4*Φ14 4*Φ14 4*Φ14
Thickness δ1 12 12 12 12 12 12 12 12 12 12 12 12
Outdoor Creepage Extender Insulation Clearance L1 150 150 280 280 400 400 400 400 560 560 560 560
Max. Creepage Extender Out Diameter ΦD2 220 220 220 220 220 220 220 220 220 220 220 220
Mounting Flange Length L4 70 70 70 70 70 70 70 70 70 70 70 70
Hole Center Distance ΦD3 190 190 190 190 190 190 190 190 190 190 190 190
Hole Diameter ΦD6 220 220 220 220 220 220 220 220 220 220 220 220
Holes Number*Holes Diameter n2*d2 6*Φ14 6*Φ14 6*Φ14 6*Φ14 6*Φ14 6*Φ14 6*Φ14 6*Φ14 6*Φ14 6*Φ14 6*Φ14 6*Φ14
Vent Hole Position L5 60 60 60 60 60 60 60 60 60 60 60 60
Thickness δ2 18 18 18 18 18 18 18 18 18 18 18 18
Oil-end Core Total Length L2 90 90 130 130 180 430 180 430 200 600 200 600
Earth Length L3 0 0 0 0 0 250 0 250 0 400 0 200
Core Diameter ΦD4 65 65 85 85 100 100 100 100 100 100 100 100
Upper Equalizing Ball Height H 30 30 30 30 30 30 30 30 30 30 30 30
Diameter ΦX 65 65 90 90 90 90 90 90 90 90 90 90
General’s Socket Diameter ΦD1 139 139 139 139 139 139 139 139 139 139 139 139
Pipe Diameter ΦD5 40 40 40 40 40 40 40 40 40 40 40 40
Lead Connector ΦD7 28 32 28 32 28 28 32 32 28 28 32 32
Cable Entry Length L6 530 530 530 530 700 960 700 960 880 1280 880 1280
Weight (kg) 20 25 20 25 30 35 30 35 40 45 40 45

If you want to get more information about the product, please contact info@wishpower.net for more support.

 

What is 12-52kV FRP Capacitive Transformer Bushing (draw lead type)?

The Medium Voltage FRP Capacitive Transformer Bushing (draw lead type), a high-performance insulating component with a rated voltage that ranges from 12kV to 52kV, is designed for medium voltage transformer applications. FRP is used as its major structural material, which means that it has superior mechanical strength, lightweight construction, and excellent environmental resistance, including moisture resistance, UV resistance, and pollution. The capacitive design of this variation increases its ability to distribute voltage evenly, creating better insulation performance and lower stress forces on the bushing. The draw lead structure facilitates simple installation and maintenance by isolating the internal conductor from the remainder of the bushing and allowing easy connection or disconnection of the conductor without removing the bushing. Its effect is to improve operational efficiency and reduce downtime. It’s also robustly designed to operate reliably under harsh environments and is suitable for use in substations, industrial environments, and power transmission systems. This bushing is versatile enough to be utilized in a modern transformer system at voltages between 12-52kV.

 

 

Features

  1. Capacitive Voltage Distribution planning

A capacitor structure is ensured to provide even voltage distribution along the bushing, minimize electrical stress, and increase insulation reliability.

  1. Fiber Reinforced Polymer Construction

The composite bushing is made of high-strength FRP material, which provides excellent mechanical durability and a light design for easy handling.

  1. Draw Lead Connection

The draw lead design simplifies conductor attachment for quick installation and maintenance without having to remove the full bushing for conductor attachment.

  1. Excellent Environmental Resistance

This is resistant to moisture, pollution, and UV exposure making it suitable for use in tough outdoor or industrial environments.

  1. Medium Voltage Optimized Performance

Balancing high insulation performance with mechanical efficiency, it has been specifically designed for the 12-52kV systems.

  1. Low Maintenance Requirements

This robust design of its construction allows less frequent inspections or replacements to occur and in the long term, provide reliability in transformer operations.

 

Application

  1. Power Transformers

This bushing commonly used is found in power transformers and provides reliable insulation and ease of voltage transfer in medium voltage transmission systems.

  1. Distribution Transformers

A requirement for distribution transformers with the guarantee of safe and efficient performance in networks that distribute electricity to building and industrial areas.

  1. Renewable Energy Transformers

Robust to outdoor environmental challenges and variable voltage conditions and ideal for transformers in wind and solar power generation systems.

  1. Industrial Transformers

To protect such operational environments, this type of transformer bushing is used in transformers supporting heavy industrial equipment.

  1. Substation Transformers

During medium voltage applications, substation transformers support critical power distribution nodes, improving insulation performance.

 

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