In power distribution systems, the bus bar insulator plays a crucial role in ensuring operational safety and electrical isolation across phases or between conductors and grounded structures. While often overlooked, choosing the right bus bar insulator directly impacts equipment reliability, system compactness, and even long-term maintenance costs.
1、Voltage Rating
Ensure the insulator supports the system’s voltage class, typically 10kV–40.5kV for medium-voltage switchgear or panel boards. A mismatch may lead to surface tracking or flashover risks.
2、Mechanical Load Requirements
The insulator must withstand the weight and tension of copper or aluminum busbars—especially in compact panels or areas with vibration. Key parameters include:
·Cantilever strength
·Tensile load
·Torsional strength
3、Material
·Epoxy resin is widely used for its excellent dielectric performance, mechanical strength, and moldability
·Some applications may still use porcelain or polymer in outdoor systems
4、Mounting Design and Size
Pay attention to the threaded inserts, mounting base, and height-to-diameter ratio, ensuring compatibility with existing panel layouts.
5、Standard Compliance
Prefer products aligned with IEC 60273, GB/T 10068, or similar standards for safety and interchangeability.
The price of bus bar insulators varies depending on size, voltage, and load rating. Here’s a general estimate based on market data:
|
Type |
Voltage Rating |
Estimated Price (USD/unit) |
|
Small indoor bus insulator (epoxy) |
10–24kV |
$1.50 – $4.00 |
|
Medium-size (switchgear use) |
24–35kV |
$3.00 – $6.50 |
|
Heavy-duty support insulator |
35–40.5kV |
$6.00 – $12.00 |
Note: Prices may vary based on batch size, mechanical rating, and surface finishing.
PUTAI Electric offers a full line of epoxy bus bar insulators for MV panels, ring main units, and OEM switchgear. Popular models include:
·M12/M16 threaded types with 80mm–220mm height
·Rated from 10kV to 40.5kV
·Custom color, engraving, or interface optional
With in-house mold tooling and epoxy casting capabilities, PUTAI maintains stable pricing and lead time, especially for batch orders.
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