Insulation Boot for Circuit Breaker
Insulation Boot for Circuit Breaker is an electrical insulation boot designed to insulate draw-out circuit breakers in MV/HV power plants and substations, installed or removed in minutes and manufactured from non-tracking cross-linked polyolefin material.
- ANSI C37.20.2
Choose a size
Selection Chart
| Voltage | Thickness(min.) |
|---|---|
| 12 kV | 1.8 mm. |
| 18 kV | 2.2 mm. |
| 24 kV | 2.8 mm. |
| 36 kV | 3.3 mm. |
Source: GALA Insulation Boot for Circuit Breaker catalogue sheet, Issue 2, January 2024.
Material properties
Technical Specification
| Properties | Value | Standard |
|---|---|---|
| Tensile Strength | 12 N/mm² (Mpa) (min.) | ASTM D638 |
| Ultimate Elongation | 300 % (min) | ASTM D638 |
| Density | 1.20 ± 0.2 gm/cm³ | ASTM D792 |
| Hardness | 45 ±10 Shore D | ASTM D2240 |
| Water absorption | 0.5 % (max.) | ASTM D570 |
| Accelerated ageing | (120 °C for 500 hrs) | ASTM D2671 |
| a. Tensile Strength | 10 N/mm² (Mpa) (min.) | ASTM D638 |
| b. Ultimate Elongation | 250 % (min.) | ASTM D638 |
| Low Temperature Flexibility (-40 °C for 4 hrs.) | No Cracking | ASTM D2671 |
| Heat Shock (250 °C for 30 min.) | No cracking or flowing | ESI 09-11 |
| Shrink Temperature | 125 °C | IEC 216 |
| Continuous Temperature Limit | -40 to +105 °C | IEC 216 |
| Dielectric Strength | 22 KV/mm (min) | ASTM D149 |
| Volume Resistivity | 1 x 10¹⁴ Ohm.cm (min) | ASTM D257 |
| Dielectric constant | 5 (max.) | ASTM D150 |
| Resistant to track & erosion | No Tracking, erosion or flame failure up to 3.25 KV for 20 min. | ASTM D2303 |
Source: GALA Insulation Boot for Circuit Breaker catalogue sheet, Issue 2, January 2024.
Dimensions & Drawings
The Insulation Boot for Circuit Breaker insulates draw-out circuit breakers in MV/HV power plants and substations, installed, removed or replaced in minutes. Moulded from non-tracking, cross-linked polyolefin, meeting ANSI C37.20.2.
Features & Benefits
- Prevents chemical corrosion (acid, alkali, salt) on draw-out circuit breakers
- Halogen free, flame retardant
- High dielectric strength
- Highly resistant to UV rays and ozone; suitable indoor or outdoor
- Protects against accidental flashover
- Easy to install or remove as often as required, complete with fasteners
- Meets ANSI C37.20.2 standards
Applications
- Insulating draw-out circuit breakers in MV/HV power plants and substations
Standards & Compliance
- ANSI C37.20.2
FAQs
Frequently Asked Questions
What is the Insulation Boot for Circuit Breaker used for?
It is used for:
- Insulating draw-out circuit breakers in MV/HV power plants and substations
How do I choose the right size?
Use the selection chart on this page: it lists every code with its dimensions. If you are not sure which fits, send the dimensions you are working to with the form below.
Which standards and test methods are quoted for it?
These, with the values in the Technical Specification on this page:
- ANSI C37.20.2
Can I get a quote, a sample or a size that is not listed?
Send your cable details, quantity and application with the "Request a Quote or Sample" form at the foot of this page. For a size or variant that is not in the chart, describe what you need there, or use Technical support at the top of the page, and the technical team will confirm what can be supplied.
47+
Years manufacturing
100+
Countries served
140
Products in range
ISO 9001:2015
Certified & tested