Cable Terminal Protector (GSTB/GRTB)
The GSTB/GRTB Cable Terminal Protector is an insulating barrier system used with any indoor termination, providing phase-to-phase-to-earth insulation for power cable terminals.
- Economically viable for 11 kV and 22 kV
Choose a size
Selection Chart
| Product code | Application voltage(kV) | Type |
|---|---|---|
| GSTB - 1 | 24 | Straight Boot |
| GRTB - 1 | 24 | Right Angle Boot |
Source: GALA Cable Terminal Protector (Right Angle and Straight) catalogue sheet, Issue 2, December 2025.
The GSTB/GRTB Cable Terminal Protector is an insulating barrier system for indoor terminations installed in compact enclosures — motor terminal boxes, ring main units, distribution transformers — giving phase-to-phase-to-earth insulation.
It comprises an insulating boot, grommets and a plug, all injection-moulded from EPDM rubber — highly insulating and track-resistant — and insulates right-angle connections.
Covered on this page
- Cable Terminal Protector(GSTB/GRTB)
Features & Benefits
- Easy to install and re-usable
- Suitable for cable range 25 sq.mm to 300 sq.mm
- Fits sector-shaped cables
- Facilitates direct voltage testing
- Economically viable for 11 kV and 22 kV
- Prevents flash-over from humid environments in HT cable entry boxes
- Protects against short circuit from reptile, bird or animal intervention
Applications
- Motor terminal boxes
- Ring main units
- Distribution transformers
FAQs
Frequently Asked Questions
What is the Cable Terminal Protector used for?
It is used for:
- Motor terminal boxes
- Ring main units
- Distribution transformers
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.
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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