24kV Porcelain Transformer Bushing 150kV BIL
High Voltage Transformer Bushings
Product Overview
A 24 kV outdoor porcelain bushing that carries the high and low voltage leads from inside the transformer tank out to the terminal side. The porcelain shell insulates the lead to ground and mechanically fixes it, so the lead does not move under short-circuit forces. At 453 mm high and 137 mm in diameter it fits the terminal spacing used on medium distribution transformers, and the 150 kV BIL rating leaves margin above the 24 kV class minimum.
Key benefits
Why Buyers Choose This Part
- 150 kV BIL gives lightning margin above the usual 125 kV figure at this voltage class
- 60 kV wet power frequency withstand keeps flashover away in rain and coastal damp
- Porcelain shell closes the lower end against moisture and dirt ingress into the tank
- 8 kg unit weight keeps terminal board loading low on pole and pad mounted units
Application scenarios
Where It Is Used
- 24 kV oil-immersed distribution transformers on pole and pad mounted installations
- Replacement of cracked or flashed bushings during substation overhaul
- Transformer assembly lines that need a stocked 24 kV terminal part
- Repair shops rewinding units where the original bushing is no longer available
Who it is for
Who It Suits
- Distribution transformer manufacturers building 24 kV oil-filled units
- Utility maintenance departments holding spares for field replacement
- Transformer repair and rewinding workshops
Problems it solves
What Goes Wrong Without The Right Part
- Bushings that track and flash over after a few wet seasons in polluted air
- Terminal leads that shift under fault current because the bushing does not clamp them
- Moisture creeping into the tank past a poorly sealed lower end
- Long lead times on 24 kV replacement parts that hold up a transformer overhaul
Technical features
How It Is Built
- Single-piece glazed porcelain shell with the lower end protected against permeation
- Rated 24 kV with 150 kV basic insulation level
- 60 kV wet power frequency withstand voltage
- 453 mm overall height, 137 mm maximum diameter
- 8 kg net weight per bushing
Specifications
Published Figures For This Product
Every value below comes from the manufacturer data for this item. Figures not listed are confirmed against the drawing before an order is placed.
| Wet Power Frequency Withstand Voltage | 60 kV |
|---|---|
| Net Weight Per Bushing | 8 kg |
| Height | 453 mm |
| Diameter | 137 mm |
| Rated Voltage | 24 kV |
| BIL | 150 kV |
Materials
Materials
- Electrical porcelain shell
- Copper or aluminium alloy conductor
Manufacturing
Process
- Body forming
- Glazing
- Firing
- Metal fitting assembly
- Routine electrical test
Quality control
Testing
- Visual and glaze inspection on every shell before assembly
- Power frequency withstand test at 60 kV wet
- Dimensional check against the 453 mm by 137 mm envelope
Certifications
Certification
- ISO 9001 quality management system
Customisation
Customisation Options
- Manufactured to customer drawings or samples
- OEM and ODM marking accepted
- Standard export packing or packing to your specification
Comparison
How It Compares
| Resin cast bushing | Porcelain holds its surface in UV and heat where cast resin chalks and tracks, which matters on outdoor tanks that sit in sun all year. |
|---|---|
| 24 kV bushings rated 125 kV BIL | The 150 kV BIL rating gives extra lightning margin on overhead-fed networks without changing the mounting envelope. |
Use guide
Before You Order And After It Arrives
- Check the terminal board hole against the 137 mm body diameter before ordering
- Handle by the porcelain body, never by the conductor stem
- Clean the glaze with a soft cloth before energising, no abrasive pads
- Torque the lower clamp evenly so the porcelain is not loaded on one side
Questions
24kV Porcelain Transformer Bushing 150kV BIL Questions
What is the BIL of this 24 kV bushing?
150 kV. That is above the 125 kV commonly quoted at 24 kV, so it suits overhead-fed networks with more lightning exposure.
What is the wet power frequency withstand voltage?
60 kV wet.
How tall is it and what does it weigh?
453 mm overall height, 137 mm diameter, 8 kg net.
Can you make this bushing to our own drawing?
Yes. Send the drawing or a sample and we produce to it. If you do not have a finished drawing we can work from your requirements.
What are your payment terms?
T/T and L/C are both accepted. The usual arrangement is 30 percent deposit with the 70 percent balance against a copy of the B/L, or 100 percent irrevocable L/C at sight.
How is it packed for export?
Standard export packing, or customised packing if you specify how it has to arrive.
Related
Related Products
DIN 20NF250A Transformer Bushing Insulators
- DIN 20NF Pattern 250 A
18kV 25A HV ANSI Transformer Bushing
- Creep Distance 480 mm
- Weight 3.5 kg
DIN 10NF250A Transformer Bushing For Oil-Immersed Transformers
- DIN 10NF Pattern 250 A
AS 15/50 Transformer Bushing Insulator 15kV
- Voltage 15 kV
- Height 485 mm
- Diameter 101 mm
Keep reading
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Transformer Bushing Selection A Guide For Engineers
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Quote For 24kV Porcelain Transformer Bushing 150kV BIL
Send the quantity and any drawing you have. Enquiries are answered within 24 hours, and we produce to customer drawings and samples.