DT 33kV 250A Porcelain Transformer Bushing
High Voltage Transformer Bushings
Product Overview
A 33 kV DT-pattern porcelain bushing for oil-filled distribution and power transformers, rated 250 A. It carries the winding lead through the transformer tank wall, insulates it from the tank and holds it in place, with the flange providing the fixing to the partition. Conductor components are copper, and the surface treatment is set to the customer specification.
Key benefits
Why Buyers Choose This Part
- 33 kV class rating for the upper end of distribution networks
- Copper conductor components for a low-resistance 250 A path
- Smooth glaze with few surface defects, checked on every unit
- Customised sizing supplied where the terminal board is non-standard
Application scenarios
Where It Is Used
- Oil-immersed distribution and power transformers at 33 kV
- Substation transformers feeding industrial sites
- OEM supply into transformer assembly lines
- Replacement during transformer refurbishment
Who it is for
Who It Suits
- Oil transformer manufacturers building 33 kV units
- Transformer repair shops sourcing 33 kV terminal parts
- Utility procurement teams stocking 33 kV spares
Problems it solves
What Goes Wrong Without The Right Part
- Glaze defects that become tracking sites within a few years
- Terminal parts that do not match a non-standard transformer tank
- Weak mechanical strength at the flange under external connection loads
- Suppliers who will not adjust the size for a one-off transformer design
Technical features
How It Is Built
- Rated 33 kV, 250 A
- For oil-filled distribution power transformers
- Copper conductor components
- Surface treatment to customer specification
- Customised sizing available
- Good mechanical and electrical strength with smooth glazing
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.
| Rated Voltage | 33 kV |
|---|
Materials
Materials
- Porcelain shell
- Copper conductor
- Aluminium fittings
Manufacturing
Process
- Porcelain forming
- Glazing
- Firing
- Conductor assembly
- Routine test
Quality control
Testing
- Surface and glaze inspection for defects on every shell
- Mechanical strength check at the flange
- Electrical routine test at the 33 kV class
Certifications
Certification
- ISO 9001 quality management system
Customisation
Customisation Options
- Customised sizes produced to your transformer tank
- Surface treatment as per your specification
- ODM supply with your own branding
Comparison
How It Compares
| 24 kV bushing | The 33 kV class gives the extra clearance and creepage needed where the network runs at 33 kV rather than 24 kV, and cannot be substituted downward. |
|---|---|
| Standard catalogue 33 kV bushing | Sizes here are produced to customer specification, which is the route to take when the tank or terminal board is not a catalogue pattern. |
Use guide
Before You Order And After It Arrives
- Send the tank and terminal board dimensions when requesting a size
- Specify the surface treatment you need with the order
- Check the oil seal at the flange during every transformer service
- Keep the glaze clean, most 33 kV flashovers start on a dirty surface
Questions
DT 33kV 250A Porcelain Transformer Bushing Questions
What transformers is this bushing for?
Oil-immersed distribution and power transformers at 33 kV, rated 250 A.
What is the conductor made of?
Copper components, with aluminium used on some fittings. Tell us what your connection metal is and we will match it.
Can you make a non-standard size?
Yes, sizes are produced to customer specification. Send the tank and terminal board dimensions.
What surface treatment is available?
As per your specification. State it with the enquiry.
Do you offer a guarantee?
A one year quality guarantee period applies.
Do you make bushings for other transformer makers?
Yes. We have produced on an OEM basis for transformer manufacturers in Europe.
Related
Related Products
EN 50180 24kV 250A Porcelain Transformer Bushing
- Standard IEC60137
DIN 42531 30NF250A Transformer Bushing
- DIN 42531 30NF Pattern 250 A
DIN 42531 10NF250A Transformer Bushing
- DIN 42531 10NF Pattern 250 A
24kV To 36kV HV Porcelain Transformer Bushing
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Quote For DT 33kV 250A Porcelain Transformer Bushing
Send the quantity and any drawing you have. Enquiries are answered within 24 hours, and we produce to customer drawings and samples.