Epoxy Standoff Insulators
Our Standard MV epoxy Standoff Insulators, designed for voltages ranging from 2400 to 48.3kV, are essential components in electrical systems. These electrical standoff insulators are engineered to separate conductors, such as quarter-inch-thick copper or aluminum bus bars, from the surfaces or components they are attached to.
Standard MV Epoxy Insulators (2400 to 48.3kV)
Single Insert Cycloaliphatic Bus Insulators
| Voltage (kV) | Part Number | Insert Pattern | Creep (mm) |
|---|---|---|---|
| 2.4 | N-002-0082-ASB-201 | Single | 82 |
| 2.4 | N-002-0082-ASR-301 | Single | 82 |
| 15 | N-015-0240-BBB-101 | Single | 240 |
| 38 | N-035-0555-BBB-1C3 | 3/1 Insert | 555 |
A20 Cycloaliphatic Bus Support Insulators
| Height | Highest System Voltage (kV) | Part Number | Class-Size | Creep Distance | ||
|---|---|---|---|---|---|---|
| Inches | Millimeters (mm) | Inches | Millimeters (mm) | |||
| 3.5″ | 89 mm | 4.8 | N-005-0115-BZG-105 | A20-1 | 4.53″ | 115 mm |
| 3.5″ | 89 mm | 4.8 | N-005-0115-BSG-105 | A20-1 | 4.53″ | 115 mm |
| 4.5″ | 115 mm | 8.3 | N-008-0162-BSG-105 | A20-2 | 6.41″ | 163 mm |
| 6″ | 153 mm | 15 | N-015-0230-BSG-004 | A20-3 | 9.06″ | 230 mm |
| 6″ | 153 mm | 15 | N-015-0230-BSG-105 | A20-3 | 9.06″ | 230 mm |
| 6″ | 153 mm | 15 | N-015-0230-BSG-225 | A20-3 | 9.06″ | 230 mm |
| 7.5″ | 191 mm | 20 | N-020-0311-BSG-105 | A20-4 | 12.26″ | 311 mm |
| 7.5″ | 191 mm | 20 | N-020-0311-BSG-225 | A20-4 | 12.26″ | 311 mm |
| 8.5″ | 216 mm | 25 | N-025-0348-BAG-004 | A20-5 | 13.7″ | 348 mm |
| 8.5″ | 216 mm | 25 | N-025-0348-BAG-105 | A20-5 | 13.7″ | 348 mm |
| 8.75″ | 223 mm | 25 | N-025-0394-BSG-210 | A20-5 | 15.51″ | 394 mm |
| 8.75″ | 223 mm | 25 | N-025-0394-BSG-105 | A20-5 | 15.51″ | 394 mm |
| 10″ | 254 mm | 25 | N-025-0413-BAG-004 | A20-5 | 16.26″ | 413 mm |
| 10.5″ | 267 mm | 38 | N-035-0485-BSG-105 | A20-6 | 19.1″ | 485 mm |
| 10.5″ | 267 mm | 38 | N-035-0485-BSG-225 | A20-6 | 19.1″ | 485 mm |
| 12.75″ | 324 mm | 38 | N-035-0562-BSG-105 | A20-6 | 22.13″ | 562 mm |
| 14″ | 356 mm | 48.3 | N-045-0639-BSG-105 | A20-X | 25.17″ | 639 mm |
A30 Cycloaliphatic Bus Support Insulators
| Height | Highest System Voltage (kV) | Part Number | Class-Size | Creep Distance | ||
|---|---|---|---|---|---|---|
| Inches | Millimeters (mm) | Inches | Millimeters (mm) | |||
| 4.5″ | 115 mm | 8.3 | N-008-0158-BSG-023 | A30-2 | 6.23″ | 159 mm |
| 6″ | 153 mm | 15 | N-015-0239-BSG-105 | A30-3 | 9.45″ | 241 mm |
| 6″ | 153 mm | 15 | N-015-0240-BSG-105 | A30-3 | 9.45″ | 241 mm |
| 7.5″ | 191 mm | 20 | N-020-0295-BSG-105 | A30-4 | 11.62″ | 296 mm |
| 8.75″ | 223 mm | 25 | N-025-0373-BSG-105 | A30-5 | 14.68″ | 373 mm |
| 10.5″ | 267 mm | 38 | N-035-0462-BSG-105 | A30-6 | 18.18″ | 462 mm |
| 11″ | 280 mm | 38 | N-035-0468-BSG-105 | A30-6 | 18.44″ | 469 mm |
| 12.75″ | 324 mm | 48.3 | N-045-0557-BSG-105 | A30-7 | 21.91″ | 557 mm |
| 14″ | 356 mm | 48.3 | N-045-0608-BSG-105 | A30-8 | 23.95″ | 608 mm |
The graphic below illustrates how we define the insert pattern in our part numbers. For a complete breakdown of part number details, see our support insulator part number cheat sheet.

Commonly utilized in electrical switchgear, switchboards, control panels, and power distribution systems within substations, these insulators play a critical role in maintaining system integrity. Their high electrical resistance prevents unintended current flow between conductors and surrounding objects, minimizing the risk of damage and energy loss.
By preventing direct physical contact between electrical components, our epoxy insulators reduce the likelihood of short circuits. This not only enhances the safety of the electrical system but also ensures optimal performance and reliability.
Our insulators are manufactured to meet the highest industry standards, offering durability and long service life even in the most demanding environments. They are resistant to environmental factors such as moisture, heat, and chemicals, ensuring consistent performance over time. Available in a variety of specifications to meet diverse application needs, many of our insulators are in stock and ready for prompt shipment. This allows for quick and efficient deployment in your electrical infrastructure projects, reducing downtime and keeping your operations running smoothly.
Our commitment to quality and customer satisfaction drives us to deliver MV Epoxy Insulators that perform reliably in demanding applications. Whether you upgrade existing systems or install new equipment, our insulators provide dependable performance and long-term durability. Additionally, our extensive product range helps you find the right solution for your specific requirements.
