DIN 42533 12-36KV Standard Porcelain Bushings(1000-4500A)
This series of products is designed according to the German industrial standard DIN 42533 and belongs to the medium-voltage HV series oil-filled bushings. They are mainly used as low-voltage side bushings for oil-immersed power transformers...
Product Profile
Product Overview
This series of products is designed according to the German industrial standard DIN 42533 and belongs to the medium-voltage HV series oil-filled bushings. They are mainly used as low-voltage side bushings for oil-immersed power transformers, enabling safe connections between the inside of the transformer and the external power network. This standard is now aligned with EN 50180 and EN 50243.
The products cover multiple voltage levels including 12kV, 24kV, and 36kV, with rated currents ranging from 1000A to 4500A.
Product Features
DIN/EN Standard Compliance: Meets DIN 42533 and EN 50180/50243 standards, ensuring the product’s quality, dimensions, and performance reliability internationally.
Oil-impregnated Composite Insulation: Uses a composite insulation structure combining solid ceramic with liquid (transformer oil). The cavity between the conductor (rigid cylindrical copper rod) and the ceramic bushing is filled with transformer oil, significantly enhancing electrical insulation strength and effectively dissipating heat generated by high currents.
High Quality Materials
Insulation Body: Made of high-quality ceramic with excellent electrical insulation, high temperature resistance, and weather resistance.
Conductive Rod: A rigid cylindrical copper rod.
High Customizability: Manufacturers usually offer a wide range of customization options, such as extended conductive rods, special connectors, or unique surface treatments.
Versatile: Designed for both indoor and outdoor installation, and can reliably operate in extreme conditions like high pollution, extreme cold/heat, or heavy corrosion.
Main Applications
Core Application: Oil-immersed power transformers, typically installed on the low-voltage side of the transformer.
Installation Environment: Suitable for both indoor and outdoor installations.
Technical Specifications
No. | Type | Factory Code | Color | Rated Voltage (kV) | Rated Current (A) | Creepage Distance (mm) | AC Dry (kV) | Weight(kg) |
1 | 10NF1000 | 6325 | Brown(RAL8016) White(RAL9003) | 12 | 1000 | 300 | 40 | 6 |
2 | 20NF1000 | 6410 | Brown(RAL8016) White(RAL9003) | 24 | 1000 | 445 | 40 | 8 |
3 | 20NF1000 CD480 | 6410 CD480 | Brown(RAL8016) White(RAL9003) | 24 | 1000 | 480 | 40 | 11 |
4 | 30NF1000 | 6540 | Brown(RAL8016) White(RAL9003) | 36 | 1000 | 680 | 40 | 12 |
5 | 30NF1000 CD720 | 6540 CD720 | Brown(RAL8016) White(RAL9003) | 36 | 1000 | 720 | 40 | 13 |
6 | 30NF1000 CD900 | 6540 CD900 | Brown(RAL8016) White(RAL9003) | 36 | 1000 | 900 | 40 | 14.5 |
7 | 30NF1000 CD1116 | 6540 CD1116 | Brown(RAL8016) White(RAL9003) | 36 | 1000 | 1116 | 40 | 16 |
8 | 10NF2000-3150 | 6325A | Brown(RAL8016) White(RAL9003) | 12 | 2000-3150 | 300 | 40 | 7 |
9 | 20NF2000-3150 | 6410A | Brown(RAL8016) White(RAL9003) | 24 | 2000-3150 | 445 | 40 | 10 |
10 | 20NF2000-3150 CD480 | 6410A CD480 | Brown(RAL8016) White(RAL9003) | 24 | 2000-3150 | 480 | 40 | 13 |
11 | 30NF2000-3150 | 6540A | Brown(RAL8016) White(RAL9003) | 36 | 2000-3150 | 680 | 40 | 13.5 |
12 | 30NF2000-3150 CD720 | 6540A CD720 | Brown(RAL8016) White(RAL9003) | 36 | 2000-3150 | 720 | 40 | 15 |
13 | 30NF2000-3150 CD900 | 6540A CD900 | Brown(RAL8016) White(RAL9003) | 36 | 2000-3150 | 900 | 40 | 16.5 |
14 | 30NF2000-3150 CD1116 | 6540A CD1116 | Brown(RAL8016) White(RAL9003) | 36 | 2000-3150 | 1116 | 40 | 20 |
15 | 10NF4500 | 6325B | Brown(RAL8016) White(RAL9003) | 12 | 4500 | 300 | 40 | 7 |
16 | 20NF4500 | 6410B | Brown(RAL8016) White(RAL9003) | 24 | 4500 | 445 | 40 | 10 |
17 | 30NF4500 | 6540B | Brown(RAL8016) White(RAL9003) | 36 | 4500 | 680 | 40 | 14.5 |
Selection and Considerations
Core Selection Basis: Choose the bushing model primarily according to the transformer’s highest voltage (12kV/24kV/36kV) and rated current (1000A–4500A).
Critical Installation Dimensions: Check the opening size (Md) on the transformer cover when selecting a model. Different current ratings require different opening sizes, e.g., 1000A corresponds to M30×2, 2000A to M42×3, and 3150A to M48×3.
Insulation and Pollution Resistance: Consider the creepage distance parameter, which is a key indicator of the product’s resistance to pollution flashover. The creepage distances vary for 12kV, 24kV, and 36kV levels.
Oil Level and Sealing: Since it’s an oil-filled structure, ensure a good seal between the bushing and the transformer cover during installation to prevent oil leakage or moisture ingress.
Corrosion Considerations: In corrosive environments, it is recommended to choose products with conductive rods that have special surface treatments like tin or silver plating.