DIN 1-3KV Standard Porcelain Bushings
IN/DIN Standard 1-3kV Porcelain Bushings are low-voltage solid ceramic open bushings, mainly designed and manufactured in accordance with DIN 42539 / DIN 42530 standards. Their core structure includes a conductive rod (made of copper or brass) running through a high-quality ceramic insulator, with the inside of the bushing filled with air insulation
Product Profile
Product Overview
IN/DIN Standard 1-3kV Porcelain Bushings are low-voltage solid ceramic open bushings, mainly designed and manufactured in accordance with DIN 42539 / DIN 42530 standards. Their core structure includes a conductive rod (made of copper or brass) running through a high-quality ceramic insulator, with the inside of the bushing filled with air insulation. The product is designed with ceramic insulation on the oil side to ensure good compatibility with transformer oil.
This product series covers two voltage levels: 1kV and 3kV, with a wide current range from 250A to 6300A. The product code usually starts with "DIN-1/" or "DIN-3/", corresponding to the 1kV and 3kV levels, respectively.
Product Applications
This series of porcelain bushings is mainly used in distribution transformers and can meet both indoor and outdoor installation requirements. Specific application scenarios include:
1.Oil-immersed distribution transformers: used as bushings on the transformer’s high and low voltage sides, enabling safe insulated passage of the conductive rod through the transformer tank cover
2.Switchgear and distribution devices: used as insulation support when wires pass through equipment enclosures or partitions
3.Power plants and substations: supports conductive parts in distribution devices, ensuring reliable insulation to ground or the enclosure
4.In addition, the product supports highly customized options, including tin plating, special drilling, special connectors, and other non-standard configurations to accommodate various installation needs.
Product Features
1.Standardized Design and High Reliability
Strictly designed according to DIN 42539/42530 standards, the product is a mature solution verified through long-term practice, offering high reliability and cost-effectiveness.
2.High-Quality Ceramic Insulators
Made from premium ceramic materials with good electrical insulation, high-temperature resistance, and weather resistance. The ceramic ensures long-term stability and maintenance-free operation.
3.Multiple Conductor Material Options
The conductive rod is available in copper and brass to meet different conductivity and cost requirements.
4.Comprehensive Specification Series
Covers 1kV and 3kV voltage levels, current ratings from 250A to 6300A, and various connection methods (base plate, spade connection, threaded nut, etc.).
5.Flexible Customization
Supports tin/silver plating, special connectors, extended rods, and many other customization options to meet almost any customer requirement.
Technical Parameters
No. | Type | Factory Code | Color | Rated Voltage (kV) | Rated Current (A) | Creepage Distance (mm) | AC Dry (kV) | BIL (kV) | Design Standard |
1 | DT 1/250 A | 1/250 A&DIN | Brown(RAL8016) | 1 | 250 | 50 | 10 | 20 | DIN 42530 |
2 | DT 1/250 B | 1/250 B&DIN | Brown(RAL8016) | 1 | 250 | - | 10 | 20 | DIN 42530 |
3 | DT 1/630 A | 1/630 A&DIN | Brown(RAL8016) | 1 | 630 | 75 | 10 | 20 | DIN 42530 |
4 | DT 1/630 B | 1/630 B&DIN | Brown(RAL8016) | 1 | 630 | - | 10 | 20 | DIN 42530 |
5 | DT 1/1000 A | 1/1000 A&DIN | Brown(RAL8016) | 1 | 1000 | 75 | 10 | 20 | DIN 42530 |
6 | DT 1/1000 B | 1/1000 B&DIN | Brown(RAL8016) | 1 | 1000 | - | 10 | 20 | DIN 42530 |
7 | DT 1/2000 A | 1/2000 A&DIN | Brown(RAL8016) | 1 | 2000 | 75 | 10 | 20 | DIN 42530 |
8 | DT 1/2000 B | 1/2000 B&DIN | Brown(RAL8016) | 1 | 2000 | - | 10 | 20 | DIN 42530 |
9 | DT 1/3150 A | 1/3150 A&DIN | Brown(RAL8016) | 1 | 3150 | 75 | 10 | 20 | DIN 42530 |
10 | DT 1/3150 B | 1/3150 B&DIN | Brown(RAL8016) | 1 | 3150 | - | 10 | 20 | DIN 42530 |
11 | DT 3/250 A | 3/250 A&DIN | Brown(RAL8016) | 1 | 250 | 120 | 10 | 40 | DIN 42539 |
12 | DT 3/250 B | 3/250 B&DIN | Brown(RAL8016) | 1 | 250 | - | - | - | DIN 42539 |
13 | DT 3/630 A | 3/630 A&DIN | Brown(RAL8016) | 1 | 630 | 120 | 10 | 40 | DIN 42539 |
14 | DT 3/630 B | 3/630 B&DIN | Brown(RAL8016) | 1 | 630 | - | - | - | DIN 42539 |
15 | DT 3/1000 A | 3/1000 A&DIN | Brown(RAL8016) | 1 | 1000 | 125 | 10 | 40 | DIN 42539 |
16 | DT 3/1000 B | 3/1000 B&DIN | Brown(RAL8016) | 1 | 1000 | - | - | - | DIN 42539 |
17 | DT 3/2000 A | 3/2000 A&DIN | Brown(RAL8016) | 1 | 2000 | 125 | 10 | 40 | DIN 42539 |
18 | DT 3/2000 B | 3/2000 B&DIN | Brown(RAL8016) | 1 | 2000 | - | - | - | DIN 42539 |
19 | DT 3/3150 A | 3/3150 A&DIN | Brown(RAL8016) | 1 | 3150 | 125 | 10 | 40 | DIN 42539 |
20 | DT 3/3150 B | 3/3150 B&DIN | Brown(RAL8016) | 1 | 3150 | - | - | - | DIN 42539 |
Precautions
1.Installation
Ensure a good seal between the bushing and the transformer tank cover to prevent oil leakage.
Check that the cover hole size matches the bushing specification; different specs require different hole diameters and thread sizes.
When connecting the conductive rod, prevent rotation; the bushing bottom has a fixing slot to secure the rod in place.
2.Operation and Maintenance
Regularly inspect the bushing surface for cracks, damage, or dirt buildup, and clean it promptly to maintain insulation.
For outdoor bushings, ensure the creepage distance meets local pollution level requirements.
Direct connection of copper conductors to aluminum busbars may cause electrochemical corrosion; it is recommended to use copper-aluminum transition joints.
3.Selection
Choose based on actual working voltage (1kV or 3kV) and rated current.
Select appropriate creepage distance and pollution level based on installation environment (indoor/outdoor) and pollution conditions.
Application Environment
1.Temperature
Suitable for -40℃ up to the positive temperature range specified by the relevant standard, functioning normally in extremely cold or hot environments.
2.Indoor/Outdoor
Designed for both indoor and outdoor use, with selectable protection levels and creepage distance configurations as needed.
3.Special Environments
High-pollution areas: select higher pollution levels (P2, P4, etc.) and increase creepage distance.
Corrosive/erosive environments: special surface treatments (tin or silver plating) can improve corrosion resistance.
High humidity environments: ceramic material has excellent moisture resistance, ensuring normal operation under humid conditions.
4.Installation Method
Can be installed on distribution transformers, switchgear, and other equipment, passing through tank covers or enclosures to safely route wires out.