End Sealing Kit for Extensible RMU/GIS Bushing
The End Sealing Kit for RMU extensible/GIS bushing seals and insulates the ends of bushings, protecting them from moisture ingress, manufactured from heat shrinkable material.
- Voltage classes 11 kV, 15 kV and 24 kV
- EN 50180
- EN 50181
More datasheets
Full dimensional specifications and technical data, ready to download.
Choose a size
Selection Charts
- Ds (min.)
- Minimum internal diameter as supplied
- Df (max.)
- Maximum internal diameter after free recovery
- Ls (min.)
- Minimum length as supplied
- Tf
- Thickness of the insulation layer after free recovery (±10%)
| Gala code | Ds(min.) | Df(max.) | Ls(min.) | Tf(±10%) |
|---|---|---|---|---|
| GEK - 401 | 75 | 35 | 125 | 4.0 |
| GEK - 501 | 100 | 45 | 125 | 4.0 |
D: internal diameter | s: as supplied | f: free recovered | L: length T: thickness of insulation layer after free recovery All dimensions are in mm Source: GALA Bushing Cap for RMU / GIS catalogue sheet, Issue 2, July 2026.
Selection chart: screened end sealing kit
| Gala code | Ds(min.) | Df(max.) | Ls(min.) | Tf(±10%) |
|---|---|---|---|---|
| GSEK - 401 | 71 | 35 | 125 | 4.0 |
| GSEK - 501 | 96 | 45 | 125 | 4.0 |
D: internal diameter | s: as supplied | f: free recovered | L: length T: thickness of insulation layer after free recovery All dimensions are in mm Source: GALA End Sealing Kit for Extensible RMU / GIS Bushing sheet (2022).
Material properties
Technical Specification
| Technical Specification | ||
|---|---|---|
| PROPERTIES | VALUE | STANDARD |
| Physical | ||
| Alliance Bushing | EN 50180 & 50181 Type C | EN 50180 & 50181 Type C |
| Tensile Strength | 12 N/mm² (Mpa) (min.) | ASTM D638 |
| Ultimate Elongation | 350 % (min) | ASTM D638 |
| Density | 1.05 ± 0.2 g/cm³ | ASTM D792 |
| Hardness | 45 ±10 Shore D | ASTM D2240 |
| Water absorption | 0.2 % (max.) | ASTM D570 |
| Thermal | ||
| Accelerated ageing | (120 0 C for 500 hrs) | ASTM D2671 |
| Tensile Strength | 11 N/mm² (Mpa) (min.) | ASTM D638 |
| Ultimate Elongation | 300 % (min.) | ASTM D638 |
| Low Temperature Flexibility | No Cracking | ASTM D2671 |
| (-40 0 C for 4 hrs.) | ||
| Heat Shock (250 0 C for 30 min.) | Heat Shock (250 C for 30 min.) | ESI 09-11 |
| Shrink Temperature | 125 0 C | IEC 216 |
| Continuous Temperature Limit | -40 to +100 0 C | IEC 216 |
| Electrical (Applicable for Insulation Layer only) | ||
| Dielectric Strength | 12 kV/mm.(min) | ASTM D149 |
| Volume Resistivity | 1 × 10¹⁴ Ohm.cm (min) | ASTM D257 |
| Dielectric constant | 5 (max.) | ASTM D150 |
| Resistant to track & erosion | No Tracking, erosion or flame failure upto 3.25 kV for 20 min | ASTM D2303 |
Dimensions & Drawings
The End Sealing Kit seals and insulates the ends of extensible RMU/GIS bushings against moisture ingress, compatible with all bushing types; the cap is removed for a new connection.
The Touch Proof Protective Cap electrically insulates and mechanically seals bushing interfaces, for permanent or temporary use.
The Screened End Cap gives a fully shielded, submersible insulating cover for an energised bushing once its drain wire is grounded — for permanent or temporary use on bushings, junctions or feed-through devices.
Covered on this page
- End Sealing Kit for Extensible RMU / GIS Bushing
Features & Benefits
- Provides a fully screened, submersible separable connection
- Mates with C-type bushings and plugs complying with EN 50180 and EN 50181
- Compact design
- 100% factory tested
- Voltage classes 11 kV, 15 kV and 24 kV
- GEK and GSEK code series with defined dimensional ranges
Applications
- RMU (Ring Main Unit) extensible bushing sealing
- GIS bushing end sealing
Standards & Compliance
- EN 50180
- EN 50181
FAQs
Frequently Asked Questions
What is the End Sealing Kit for Extensible RMU/GIS Bushing used for?
It is used for:
- RMU (Ring Main Unit) extensible bushing sealing
- GIS bushing end sealing
How do I choose the right size?
Use the selection chart on this page: it lists every code with its dimensions, and the key above it says what each column means. 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:
- EN 50180
- EN 50181
Where can I download the datasheet?
From the "Download datasheet" button at the top of this page, or here:
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.
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