35kV Cold Shrink Cable Accessories (26/35kV)
Top-of-range 26/35kV cold shrink terminations and joints for renewable collector systems and substations. Highest electrical stress, tightest installation repeatability.
35kV cold shrink accessories sit at the top of the medium-voltage range, covering 26/35kV systems used on wind and solar collector circuits, substations and utility transmission spurs. At this voltage the electrical stress is high enough that small installation variations become reliability problems, so the build leans hardest on factory-formed geometry and a repeatable, heat-free seat.
This is the highest-priority line in the development plan because the technical barrier is real and the buyers -- renewable EPC, wind balance-of-system suppliers, substation EPC and utility procurement -- qualify on project approval and supply lead time as much as on price. We approach it as a country-by-country pool of EPC, MV cable and switchgear accounts rather than a commodity list.
Technical specifications
| Voltage class | 26/35 kV (35 kV rated) |
| Cable range | 95 mm2 to 800 mm2 copper and aluminium XLPE |
| Sleeve material | High-dielectric silicone, quad-layer stress control |
| Operating temperature | -55 C to +90 C (silicone variant to +200 C) |
| Seal rating | IP68 after installation |
| Standards | IEEE 404, EN 50068, CENELEC HD 628, IEC 60250, GB/T 22794 |
| Installation | Cold shrink -- no heat source required |
Applications by industry
- Wind farm 35kV collector cable terminations
- Solar PV substation and collector system joints
- Utility 35kV transmission and distribution spurs
- Substation and switchgear 35kV feeder terminations
- Mining and heavy-industrial 35kV distribution
- Offshore and coastal MV collector circuits
Why cold shrink at 35kV
At 35kV the partial-discharge margin is thin. A cold-shrink body carries a moulded, quad-layer stress-control geometry that does not depend on field taping, and it seats with constant radial pressure and no heat. Against a premoulded termination the trade is simpler logistics and no specialist crimp/jointing skill; against heat shrink the trade is no flame and a far more repeatable result on critical feeders.
Stress control and field repeatability
The stress-control geometry is fixed in the body, but 35kV leaves little tolerance for cable-preparation error. We size bodies by cable OD, supply a clear screen-cutoff and seal-seating procedure, and support project approval with consistent documentation. The objective is that the hundredth joint looks like the first.
Inspection and traceability
We state the control plan with you. Batch traceability links the raw rubber lot to the finished part and the test record.
- First-article inspection (FAI) against your cable schedule
- In-process dimensional checks at every station
- Batch certificate of conformance (COA) on request
- Lot traceability to incoming material certificate
- Partial-discharge and AC withstand testing available on request
Related components
20kV Cold Shrink (12/20kV)
For 12/20kV distribution feeders.
20kV Class Cold Shrink (18/20kV)
For mining and industrial 20kV class.
35kV Busbar Heat Shrink Casing
Pair with 35kV switchgear busbar insulation.
Common questions
What causes partial discharge in a 35kV termination?
Typically a poorly finished stress-control region or a body seated on the wrong cable OD. A moulded stress cone and correct sizing remove the main causes.
Cold shrink or premoulded at 35kV?
Cold shrink avoids the specialist jointing skill and logistics of premoulded parts while keeping a moulded stress geometry. Premoulded can offer marginally tighter tolerance for fixed designs.
What cable range is covered?
Typically 95 mm2 to 800 mm2 copper or aluminium XLPE, selected by outer diameter.
Which standards apply?
IEEE 404, EN 50068, CENELEC HD 628 and IEC 60250 are common; GB/T 22794 for Chinese projects.
How long is the supply lead time?
Lead time depends on approval status and volume. Utility and substation projects qualify first, then order against the approved body.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for 35kV Cold Shrink Cable Accessories
Send the cable schedule, project approval status and annual volume. We confirm the 35kV body family, documentation and lead time.