DIN 24kV 630A Transformer Bushing CD525
High Voltage Transformer Bushings
Product Overview
The long-creepage member of the 24 kV 630 A DIN family. Its 525 mm creepage distance is the reason to choose it: coastal salt, cement dust and industrial fallout build a conductive film on the glaze, and the extra creepage buys the surface more time between washes. Mechanically it is close to the 440 mm version at 385 mm tall and 160 mm across, so the terminal board does not need reworking.
Key benefits
Why Buyers Choose This Part
- 525 mm creepage for salt-laden and industrially polluted sites
- 630 A continuous rating at 24 kV in a 6.8 kg body
- 125 kV BIL with 50 kV wet power frequency withstand
- 160 mm diameter keeps the existing DIN terminal cut-out usable
Application scenarios
Where It Is Used
- Coastal substations where salt fog settles on the bushing surface
- Transformers near cement, steel and chemical plants with airborne fallout
- Desert installations where wind-blown dust bridges short creepage paths
- Utilities extending wash intervals on hard-to-reach pole transformers
Who it is for
Who It Suits
- Transformer builders quoting projects with a heavy pollution class
- Utilities in coastal and industrial regions
- EPC contractors specifying long-creepage terminal parts
Problems it solves
What Goes Wrong Without The Right Part
- Repeat flashovers on standard-creepage bushings at polluted sites
- Washing programmes that cost more than the bushing itself over a few years
- Specification changes that would otherwise force a new terminal board
- Finding 630 A capacity and long creepage in the same DIN envelope
Technical features
How It Is Built
- Rated 24 kV at 630 A
- 525 mm creepage distance
- 125 kV BIL, 50 kV wet power frequency withstand
- 385 mm height, 160 mm diameter
- 6.8 kg net weight
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.
| Creepage Distance | 525 mm |
|---|---|
| Net Weight | 6.8 kg |
| Height | 385 mm |
| Diameter | 160 mm |
| Rated Voltage | 24 kV |
| Rated Current | 630 A |
| BIL | 125 kV |
| Power Frequency Withstand Voltage Wet | 50 kV |
Materials
Materials
- Electrical porcelain shell
- Copper or aluminium alloy conductor
Manufacturing
Process
- Shell forming
- Glazing
- High temperature firing
- Fitting assembly
- Routine test
Quality control
Testing
- Creepage measured against the 525 mm drawing figure
- 50 kV wet power frequency withstand test
- Glaze inspection for pinholes and crazing
Certifications
Certification
- ISO 9001 quality management system
Customisation
Customisation Options
- Other creepage distances produced to drawing
- Flange and stem detail adapted to your terminal board
- OEM and ODM marking accepted
Comparison
How It Compares
| DIN 20NF630A at 440 mm creepage | Same current rating, 85 mm more creepage. The CD525 is the one to specify when the site has salt or industrial fallout. |
|---|---|
| Silicone composite bushing | Porcelain does not lose hydrophobicity with age the way a polymer housing can, and it is repairable to a known dimension after a strike. |
Use guide
Before You Order And After It Arrives
- Match the pollution class of the site to the creepage figure before ordering
- Inspect the glaze after transport, a chipped shed shortens the creepage path
- Wash with clean water only, no solvents on the glaze
- Check the flange gasket at every overhaul to keep the tank seal sound
Questions
DIN 24kV 630A Transformer Bushing CD525 Questions
Why choose 525 mm creepage over 440 mm?
Because of site pollution. Salt fog, cement dust and industrial fallout form a conductive film and the longer path keeps the leakage current from bridging.
Does the longer creepage change the mounting dimensions?
No. The body is 385 mm tall and 160 mm in diameter, close enough to the standard version that the terminal board does not need reworking.
What is the rated current?
630 A at 24 kV.
What is the BIL?
125 kV, with a 50 kV wet power frequency withstand.
Can you supply a matching drawing for approval?
Yes. Ask on WhatsApp and we will send the dimensioned drawing before you place the order.
What packing do you use for sea freight?
Standard export packing, or packing built to your specification if the consignment is being trans-shipped.
Related
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