DIN 42539 3KV Standard Porcelain Bushings(250-4500A)
This product series is a solid porcelain open bushing designed strictly according to the German industrial standard DIN 42539. It belongs to the LV series and is mainly used as a lead-out bushing for oil-immersed distribution transformers, serving to safely connect, insulate, and secure the transformer windings to the external circuit.
Product Profile
Product Overview
This product series is a solid porcelain open bushing designed strictly according to the German industrial standard DIN 42539. It belongs to the LV series and is mainly used as a lead-out bushing for oil-immersed distribution transformers, serving to safely connect, insulate, and secure the transformer windings to the external circuit.
The product covers a wide range of rated currents (250A-4500A), meeting the requirements of transformers of different capacities.
Product Features
Complies with DIN standards: Meets the DIN 42539 standard, ensuring the reliability and consistency of the product's quality, dimensions, and performance.
High-quality Materials
Insulating Body: Made from high-quality ceramic (electro-ceramic), offering excellent electrical insulation, high-temperature resistance, and weather resistance.
Conductive Rod: Typically made of copper or brass to ensure good conductivity.
Structural Design: It is a "solid porcelain open bushing" with a simple and sturdy structure. It features a porcelain insulator on the oil side for better compatibility with the transformer oil environment.
Highly Customizable: Manufacturers usually offer customization services such as tin plating, special drilling, and special connectors to meet customers' personalized needs.
Main Applications
Core Application: Oil-immersed distribution transformers, used as lead-out bushings.
Other Applications: Also suitable for switchgear, distribution devices, and other scenarios where wires need to pass through metal enclosures or panels, 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 | 3kV/250A -Top | 3/250 -A | Brown(RAL8016) | 1 | 250 | 120 | 40 | 0.4 |
2 | 3kV/250A -Top | 3/250 -B | Brown(RAL8016) | 1 | 250 | - | - | 0.2 |
3 | 3kV/630A -Top | 3/630 -A | Brown(RAL8016) | 1 | 630 | 120 | 40 | 0.6 |
4 | 3kV/630A -Top | 3/630 -B | Brown(RAL8016) | 1 | 630 | - | - | 0.3 |
5 | 3kV/1000A -Top | 3/1000 -A | Brown(RAL8016) | 1 | 1000 | 125 | 40 | 0.9 |
6 | 3kV/1000A -Top | 3/1000 -B | Brown(RAL8016) | 1 | 1000 | - | - | 0.6 |
7 | 3kV/2000A -Top | 3/2000 -A | Brown(RAL8016) | 1 | 2000 | 125 | 40 | 1.2 |
8 | 3kV/2000A -Top | 3/2000 -B | Brown(RAL8016) | 1 | 2000 | - | - | 0.7 |
7 | 3kV/3150A -Top | 3/3150 -A | Brown(RAL8016) | 1 | 3150 | 125 | 40 | 2 |
8 | 3kV/3150A -Top | 3/3150 -B | Brown(RAL8016) | 1 | 3150 | - | - | 0.8 |
Selection and Precautions
Core Selection Basis: Primarily select the bushing based on the transformer's rated voltage (3kV) and rated current (250A-4500A).
Key Installation Dimensions: When selecting, the cover opening (Md) size must be checked to ensure a fit with the bushing. For example, a 250A product corresponds to an M12×1.75 threaded opening.
Insulation and Pollution Protection: Pay attention to the creepage distance parameter. In high-pollution or humid environments, choose products with longer creepage distances.
Corrosion Considerations: In corrosive environments, it is recommended to choose conductors with special surface treatments like tin or silver plating to enhance corrosion resistance.
Sealing and Installation: Ensure proper sealing between the bushing and the transformer cover during installation to prevent transformer oil leakage.