FAQs: Medium and High Voltage Cable Accessories (6.6kV – 145kV)

Terminations • Joints

Need help? Our team is here to support you.

Email us

Want to send us a message? Click the link above.
Call us

Monday to Friday between 9am and 5pm on

0870 536 0036

Thin horizontal strip of gradation from green to light blue

Answers to frequent questions about medium and high voltage cable accessories from 3M

Clicking any of these links will jump you to that particular category.

Medium Voltage Terminations 6.6 kV - 52 kV
Medium Voltage Joints, 6.6 kV - 52 kV
High Voltage Terminations, 72.5kV - 145kV
High Voltage Joints, 72.5kV - 145kV

Medium Voltage Terminations 6.6 kV - 52 kV

Back to top of page

What is the difference between 3M™ Cold Shrink QT-III and QT-II Silicone Rubber Termination Kits?
- 3M™ Cold Shrink QT-II and QT-III Terminations function in a similar manner. They both employ 3M cold shrink technology which utilises a high-dielectric constant (Hi-K) stress control tube. The Cold Shrink QT-II employs a dielectric grade silicone grease in conjunction with the stress control tube while the Cold Shrink QT-III employs a conformable Hi-K stress controlling compound. The termination is made from a pre-stretched Hi-K stress control tube and a silicone rubber termination insulator body installed around a core. When the core is removed, the rubber provides a constant inward pressure on the cable, forming a seal which expands and contracts with variations in temperature and load, thereby creating a ‘living seal.’
  
  Discover more about 3M Terminations for Electrical Construction and Maintenance.
  
  The silicone rubber material used to make the Cold Shrink QT-III termination has better track-resistant properties than the Cold Shrink QT-II, while allowing for a much shorter design without sacrificing product performance. This is especially important when space is an issue as in cabinet placements. In addition, there are fewer steps involved when using a Cold Shrink QT-III termination so installation is simpler and generally quicker than the QT-ll termination.
Collapse
What standards do 3M Terminations meet?
All 3M™ Cold Shrink terminations are fully type tested, to Cenelec HD 629.1 / IEC 60502. Please contact us if you would like a copy of the type test report.
Collapse
What is an inverted, skirted termination kit?
- An inverted, skirted termination kit includes a non-skirted termination on one core and skirts on another core. The non-skirted termination is installed first and then the skirt assembly is installed on top of the non-skirted termination so that the skirts are oriented in the proper downward direction when the termination and cable are installed from the top direction versus the bottom direction, such as in a cabinet.
  
  Please contact us for more information, and help with product selection
Collapse
Are inverted terminations kits available in the UK?

Please contact us for more information, and help with product selection.

Collapse
Does 3M have medium voltage (5kV-46kV) heat shrink terminations?

No, we offer silicone cold shrink terminations for medium voltage. 3M cold shrink technology utilises a high-dielectric constant (Hi-K) stress control tube and conformable Hi-K stress controlling compound. The pre-stretched rubber is wrapped around a core. When the core is removed, the rubber provides a constant inward pressure on the cable, forming a seal which expands and contracts with variations in temperature and load, forming a ‘living seal’. We do offer heat shrink products for low voltage (<1 kV) applications.

Would you like to learn more about how cold shrink technology can help decrease installation time and provide better environmental sealing? Check out the Cold Shrink Revolution.

Collapse

Medium Voltage Joints, 6.6 kV - 52 kV

Back to top of page

Does 3M have medium voltage (6.6kV - 52kV) heat shrink joints?

No, we offer silicone cold shrink or EPDM* rubber joints for medium voltage.

3M Cold Shrink Technology uses high quality built in stress control. The pre-stretched rubber splice is wrapped around a core. When the core is removed, the rubber provides a constant inward pressure on the cable, forming a seal which expands and contracts with variations in temperature and load, forming a ‘living seal’. We do offer heat shrink products for low voltage (<1 kV) applications.

Would you like to learn more about how cold shrink technology can help decrease installation time and provide better environmental sealing? Check out the Cold Shrink Revolution.

*ethylene propylene diene monomer rubber

Collapse
Does 3M have joint options for connecting different cable types together?
- Yes, we have options for project or customer specific joints. Please contact us for more information.
Collapse

High Voltage Terminations, 72.5kV - 145kV

Back to top of page

Does 3M make a replacement for a failing porcelain oil filled 69 kV termination?

Yes, the 3M™ Cold Shrink QT III Cold Shrink Termination kit, a non-self-supporting termination which meets or exceeds IEEE-48 Class 1 standard for 69kV, and IEC 60840 for 72.5kV terminations for outdoor applications.

This kit is lightweight and safer to use as no flame or torch is needed and cold shrink technology eliminates the need for oil filled terminations.

Download brochure:
High Voltage Underground Cable Accessories for 69 kV/72.5 kV (PDF, 2.57 MB)

Collapse
Does 3M have a 72.5kV Terminations?

Yes, we have a range of QTEN Termination Kits, 96-EP Series.

Download brochure:
High Voltage Underground Cable Accessories for 69 kV/72.5 kV (PDF, 2.57 MB)

Collapse
Does 3M have terminations at voltage classes higher than 72.5kV?

Yes, all terminations above 72.5kV will be custom kitted. In order to determine proper kit components an application engineer from 3M will have to be contacted. You will need a detailed cable data sheet so we can make sure that all of our accessories will fit your application.

Collapse

High Voltage Joints, 72.5kV - 145kV

Back to top of page

Does 3M have a 72.5kV joints?

Yes, we have a range of 72.5kV Joints, 96-AC, and 96-AD Series.

Download brochure:
High Voltage Underground Cable Accessories 69 kV/72.5 kV (PDF, 2.57 MB)

Collapse
Does 3M have joints at voltage classes higher than 72.5kV?

Yes, we have joints and terminations up to 145kV. All joints above 72.5kV will be custom kitted. You’ll need to contact an application engineer from 3M. We will determine the proper kit components based on the details you provide about your cable which can be found on your cable data sheet.

Download brochure:
High Voltage Underground Cable Accessories 69 kV/72.5 kV (PDF, 2.97 MB)

Collapse

Still have questions?

Send us an email and we’ll route it to the right expert. Get help with product information and technical questions. Request offsite and onsite training.

Email us

Are you a distributor with questions?

bCom Distributor Portal

For authorised distributors only, bCom provides product information, pricing, contracts, online purchasing, invoices and much more.

Request access

Close

All fields are required unless indicated optional
Message
Business Email Address
Country
Language
State or Region
First Name
Last Name
Company
Postal Code
Subscribe to Newsletter
Data Privacy
Marketing Consent
Profiling Consent
End Devices Consent
3M takes your privacy seriously. 3M and its authorized third parties will use the information you provided in accordance with our Privacy Policy to send you communications which may include promotions, product information and service offers. Please be aware that this information may be stored on a server located in the U.S. If you do not consent to this use of your personal information, please do not use this system.
Submit

Thank You

Your form was submitted successfully!

Our Apologies...

An error has occurred while submitting. Please try again later...