DIN 42530 1KV Standard Porcelain Bushings(250-4500A)
This series of products is a low-voltage solid porcelain open bushing designed strictly according to the German industrial standard DIN 42530. It is mainly used as a lead bushing for oil-immersed distribution transformers, responsible for safely connecting, insulating, and securing the internal windings of the transformer to external circuits.
Product Profile
Product Overview
This series of products is a low-voltage solid porcelain open bushing designed strictly according to the German industrial standard DIN 42530. It is mainly used as a lead bushing for oil-immersed distribution transformers, responsible for safely connecting, insulating, and securing the internal windings of the transformer to external circuits.
The products cover a wide range of rated currents (250A-4500A) to meet the needs of transformers of different capacities. While the standard mainly covers up to 3150A, larger current specifications like 4500A are also often manufactured to meet market demand.
Product Features
Following DIN Standards: Complies with DIN 42530 standards, ensuring the reliability and consistency of product quality, dimensions, and performance.
High-Quality Materials
Insulation Body: Made of high-quality ceramic (electroceramics), offering excellent electrical insulation, high-temperature resistance, and weather resistance.
Conductive Rod: Usually made of copper or brass to ensure good electrical conductivity.
Structural Design: It is a “solid porcelain open bushing” with a simple and sturdy structure. Some products also feature ceramic insulators on the oil side for better compatibility with transformer oil.
Highly Customizable: Manufacturers typically offer customization services such as tin/silver plating, special drilling, specific lengths, or special connectors to meet individual customer needs.
Main Applications
Core Application: Oil-immersed distribution transformers, serving as lead bushings for both high and low voltage sides.
Other Applications: Also suitable for switchgear, distribution devices, and other scenarios where wires pass through metal enclosures or partitions, providing insulation and support.
Installation Environment: Suitable for both indoor and outdoor installations.
Technical Parameters
No. | Type | Factory Code | Color | Rated Voltage (kV) | Rated Current (A) | Creepage Distance (mm) | AC Dry (kV) | Weight(kg) |
1 | 1kV/250A -Top | 1/250 -A | Brown(RAL8016) | 1 | 250 | 50 | 40 | 0.2 |
2 | 1kV/250A -Top | 1/250 -B | Brown(RAL8016) | 1 | 250 | - | - | 0.1 |
3 | 1kV/630A -Top | 1/630 -A | Brown(RAL8016) | 1 | 630 | 75 | 40 | 0.4 |
4 | 1kV/630A -Top | 1/630 -B | Brown(RAL8016) | 1 | 630 | - | - | 0.2 |
5 | 1kV/1000A -Top | 1/1000 -A | Brown(RAL8016) | 1 | 1000 | 75 | 40 | 0.6 |
6 | 1kV/1000A -Top | 1/1000 -B | Brown(RAL8016) | 1 | 1000 | - | - | 0.4 |
7 | 1kV/2000A -Top | 1/2000 -A | Brown(RAL8016) | 1 | 2000 | 75 | 40 | 0.8 |
8 | 1kV/2000A -Top | 1/2000 -B | Brown(RAL8016) | 1 | 2000 | - | - | 0.5 |
7 | 1kV/3150A -Top | 1/3150 -A | Brown(RAL8016) | 1 | 3150 | 75 | 40 | 1.2 |
8 | 1kV/3150A -Top | 1/3150 -B | Brown(RAL8016) | 1 | 3150 | - | - | 0.6 |
Selection and Considerations
Core Selection Basis: Primarily select the bushing based on the transformer’s rated voltage (1kV) and rated current (250A-4500A).
Key Installation Dimensions: When selecting, check the box cover opening (Md) size to ensure compatibility with the bushing. For example, a 2000A product corresponds to an M42×3 threaded opening.
Insulation and Pollution Protection: Pay attention to the creepage distance. In highly polluted or humid environments, choose products with a larger creepage distance or consider adding a silicone rubber skirt to enhance pollution flashover resistance.
Corrosion Considerations: In corrosive environments, it is recommended to choose products with special surface treatments like tin or silver plating to enhance corrosion resistance.
Sealing and Installation: Ensure a good seal between the bushing and transformer box cover during installation to prevent oil leakage. Also, take care that the conductive rod does not rotate during connection.