Heat Shrink Cable Accessory Kits
C35 Medium Voltage Heat Shrink Cable Accessory Kits 26/35 kV
The highest voltage class in the range covering 26/35 (40.5) kV single core and three core cable to 630 mm²
- Voltage class: 26/35 (40.5) kV
- Operating temperature: -55°C to 105°C
- Supplied by set, with the materials in the kit
- Well resistance against weather and damage
- Compliant Standard: IEC 60502-4: 2010-12, GB/T 12706.4
C35 · Cable Accessory Kits
Product Overview
What C35 Does
Single core, 3 cores cable accessories. Suitable for protection of indoor and outdoor electric power cable joint and termination up to 26/35 (40.5) kV.
The highest voltage class in the range covering 26/35 (40.5) kV single core and three core cable to 630 mm² It is manufactured by Dalian United Polymer Material Co., Ltd. in Dalian China where radiation cross linking extrusion and molding are all performed in house under one quality system.
Key Benefits
- Coverage to 630 mm² so the largest distribution conductors are handled by the same family
- One installation method shared with C15 and C1 so crews qualify across the whole range
- 1000 hours salt fog and 300 hours humidity endurance for outdoor and indoor variants
- Two short circuit regimes tested on both screen and conductor so through fault survival is proven
- Full documentation package for utility approval submissions
Who It Is For
Who Benefits Most from C35
The buyers and site teams this product was designed around
Transmission and Sub Transmission Utilities
33 kV and 35 kV feeder circuits between primary substations where a failure takes out a large block of load.
Large Industrial and Mining Operations
Mine surface substations steel plants and smelters running 35 kV distribution to process loads.
Utility Scale Renewable Projects
Solar and wind collector systems that have moved from 33 kV to reduce collection losses across large arrays.
Substation Construction Contractors
Greenfield and refurbishment projects that need one qualified accessory family across the whole voltage range.
Problems It Solves
Problems This Product Removes
Every one of these is a failure mode we have seen on real networks
Electrical Stress Rises Sharply with Voltage
At 26/35 kV the field at the screen cut back is severe enough that an ordinary insulating tube will fail. C35 uses a dedicated stress control layer matched to this class.
Large Conductors Mean Long Preparation Lengths
630 mm² cable is heavy and stiff. C35 dimensions are set so a termination can be built in a normal cable box without forcing the bend radius.
Approval Evidence for 35 kV Is Stricter
Utilities apply the full five sequence termination test and three sequence joint test. C35 is designed against all of them.
Pollution Flashover Risk Grows with Voltage
At 35 kV outdoor a short creepage path invites flashover. The WSY variant is supplied with sufficient rain sheds for heavy pollution sites.
Application Scenarios
Where It Is Used
Primary Substation Feeder Terminations
35 kV cable into gas insulated or air insulated switchgear cable boxes.
Overhead Line to Cable Transitions
Pole mounted 35 kV terminations exposed to full weather and UV load.
Solar Collector Switching Stations
Repeated single core terminations at collector circuit breakers.
Mine Surface Distribution
Cable joints in harsh dusty and mechanically abusive environments.
Long Feeder Straight Joints
Joints on 35 kV feeder cable pulled in sections through duct banks.
Technical Data
Specifications and Dimensions
Test methods and requirements taken directly from the manufacturing specification
Test Procedures and Requirements for Heat-Shrinkable Terminations
| No. | Test | Condition | Requirements | Test Sequence 1.1 | 1.2 | 1.3 | 1.4 | 1.5 |
|---|---|---|---|---|---|---|---|---|
| 1 | AC and DC Voltage | 4.5 U0, 5min (AC) and 4.0 U0, 15min (DC) | No breakdown, No flashover | X | X | X | ||
| 2 | AC (wet,indoor) | 4.0 U0, 1min | No breakdown, No flashover | X | ||||
| 3 | Partial discharge | At 1.73 U0 (ambient temperature) | 10 pC max. | X | ||||
| 4 | Impulse at θt | 10 impulses of each polarity | No breakdown, No flashover | X | ||||
| 5 | Heating cycles in air (indoor) | 60 cylces at θt and 2.5 U0 | No breakdown, No flashover | X | ||||
| 6 | Immersion test(outdoor) | 10 cylces at θt (IEC 61442: 2005 9.4) | / | X | ||||
| 7 | Partial discharge | At 1.73 U0 (at θt and ambient temperature) | 10 pC max. | X | X | |||
| 8 | Thermal short-circuit (screen) | two short-circuits at Isc of the cable screen | No visible deterioration | X | X | |||
| 9 | Thermal short-circuit (conductor) | two short-tircuits to raise conductor to θsc of the cable | No visible deterioration | X | X | |||
| 10 | Dynamic short-circuit | One short-circuit at Id | No visible deterioration | X | ||||
| 11 | Impulse (ambient temperature) | 10 impulses of each polarty | No breakdown, No flashover | X | X | X | ||
| 12 | AC voltage | 2.5 U0, 15min | No breakdown, No flashover | X | X | X | ||
| 13 | Humidity (Indoor) | 300 hrs at 1.25 U0, tripping times not more than three | No breakdown or flashover, no significant damage. | X | ||||
| 14 | Salt fog (Outdoor) | 1000 hrs at 1.25 U0, tripping times not more than three | No breakdown or flashover, no significant damage. | X | ||||
| 15 | Examination | For information only | GB/T 12706.4 IEC 60502-4 | X | X | X | X | X |
Test Procedures and Requirements for Heat-Shrinkable Joint
| No. | Test | Condition | Requirements | Test Sequence 2.1 | 2.2 | 2.3 |
|---|---|---|---|---|---|---|
| 1 | AC and DC Voltage | 4.5 U0, 5min (AC) and 4.0 U0, 15min (DC) | No breakdown, No flashover | X | X | X |
| 2 | Partial discharge | At 1.73 U0 (ambient temperature) | 10 pC max. | X | ||
| 3 | Impulse at θt | 10 impulses of each polarity | No breakdown, No flashover | X | ||
| 4 | Heating cycles in air | 30 cylces at θt and 2.5 U0 | No breakdown, No flashover | X | ||
| 5 | Heating cycles in air (under water) | 30 cylces at θt and 2.5 U0, water heitht 1m | No breakdown, No flashover | X | ||
| 6 | Partial discharge | At 1.73 U0 (at θt and ambient temperature) | 10 pC max. | X | ||
| 7 | Thermal short-circuit (screen) | two short-circuits at Isc of the cable screen | No visible deterioration | X | X | |
| 8 | Thermal short-circuit (conductor) | two short-tircuits to raise conductor to θsc of the cable | No visible deterioration | X | X | |
| 9 | Dynamic short-circuit | One short-circuit at Id | No visible deterioration | X | ||
| 10 | Impulse (ambient temperature) | 10 impulses of each polarty | No breakdown, No flashover | X | X | X |
| 11 | AC Voltage | 2.5 U0, 15min | No breakdown, No flashover | X | X | X |
| 12 | Examination | For information only | GB/T 12706.4 IEC 60502-4 | X | X | X |
26/35 (40.5) kV Selection
| Size of conductor (mm2) 50-120 | Cable core number 3 | Product description NSY-3532 | Installation Location Terminations Indoor | |
|---|---|---|---|---|
| 150-240 | 3 | NSY-3533 | Terminations Indoor | |
| 300-400 | 3 | NSY-3534 | Terminations Indoor | |
| 500-630 | 3 | NSY-3535 | Terminations Indoor | |
| 50-120 | 3 | WSY-3532 | Terminations Outdoor | |
| 150-240 | 3 | WSY-3533 | Terminations Outdoor | |
| 300-400 | 3 | WSY-3534 | Terminations Outdoor | |
| 500-630 | 3 | WSY-3535 | Terminations Outdoor | |
| 50-120 | 3 | JSY-3532 | Joint | |
| 150-240 | 3 | JSY-3533 | Joint | |
| 300-400 | 3 | JSY-3534 | Joint | |
| 500-630 | 3 | JSY-3535 | Joint | |
| 50-120 | 1 | NSY-3512 | Terminations Indoor | |
| 150-240 | 1 | NSY-3513 | Terminations Indoor | |
| 300-400 | 1 | NSY-3514 | Terminations Indoor | |
| 500-630 | 1 | NSY-3515 | Terminations Indoor | |
| 50-120 | 1 | WSY-3512 | Terminations Outdoor | |
| 150-240 | 1 | WSY-3513 | Terminations Outdoor | |
| 300-400 | 1 | WSY-3514 | Terminations Outdoor | |
| 500-630 | 1 | WSY-3515 | Terminations Outdoor | |
| 50-120 | 1 | JSY-3512 | Joint | |
| 150-240 | 1 | JSY-3513 | Joint | |
| 300-400 | 1 | JSY-3514 | Joint | |
| 500-630 | 1 | JSY-3515 | Joint |
8.7/15 (17.5) kV Selection
| Size of conductor (mm2) 25-50 | Cable core number 3 | Product description NSY-1031 | Installation Location Terminations Indoor | |
|---|---|---|---|---|
| 70-120 | 3 | NSY-1032 | Terminations Indoor | |
| 150-240 | 3 | NSY-1033 | Terminations Indoor | |
| 300-400 | 3 | NSY-1034 | Terminations Indoor | |
| 25-50 | 3 | WSY-1031 | Terminations Outdoor | |
| 70-120 | 3 | WSY-1032 | Terminations Outdoor | |
| 150-240 | 3 | WSY-1033 | Terminations Outdoor | |
| 300-400 | 3 | WSY-1034 | Terminations Outdoor | |
| 25-50 | 3 | JSY-1031 | Joint | |
| 70-120 | 3 | JSY-1032 | Joint | |
| 150-240 | 3 | JSY-1033 | Joint | |
| 300-400 | 3 | JSY-1034 | Joint | |
| 25-50 | 1 | NSY-1011 | Terminations Indoor | |
| 70-120 | 1 | NSY-1012 | Terminations Indoor | |
| 150-240 | 1 | NSY-1013 | Terminations Indoor | |
| 300-400 | 1 | NSY-1014 | Terminations Indoor | |
| 25-50 | 1 | WSY-1011 | Terminations Outdoor | |
| 70-120 | 1 | WSY-1012 | Terminations Outdoor | |
| 150-240 | 1 | WSY-1013 | Terminations Outdoor | |
| 300-400 | 1 | WSY-1014 | Terminations Outdoor | |
| 25-50 | 1 | JSY-1011 | Joint | |
| 70-120 | 1 | JSY-1012 | Joint | |
| 150-240 | 1 | JSY-1013 | Joint | |
| 300-400 | 1 | JSY-1014 | Joint |
Manufacturing and Quality
How It Is Made and Checked
Compounding extrusion radiation cross linking expansion and test all under one roof in Dalian
-
01
Compounding
Base polyolefin antioxidants flame retardants and functional fillers are mixed to a recipe held under our own formulation control rather than bought as a masterbatch.
-
02
Extrusion
The compound is extruded to the required wall and diameter. Co extruded products form two or three layers in a single pass so no interface can trap air.
-
03
Radiation Cross Linking
Electron beam irradiation creates the cross linked network that gives the material its shape memory. This step is what makes the product heat shrinkable.
-
04
Expansion
The cross linked part is heated expanded to its supplied diameter and cooled under tension so the expanded shape is locked in until heat is applied again.
-
05
Test and Inspection
More than 90 percent of product performance tests are carried out in our own laboratory including tensile elongation heat aging dielectric strength and tracking resistance.
-
06
Packing and Traceability
Each batch carries a production record so a delivered part can be traced back to its compound lot and process parameters.
Certification
ISO 9001:2015
Quality management system
IATF 16949:2016
Automotive quality management
ISO 14001:2015
Environmental management
ISO 45001:2018
Occupational health and safety
GJB 9001C-2017
Defence quality management
UL 224 E341796
Extruded insulating tubing
CE / RoHS
European conformity and restricted substances
CCS / ABS / DNV
Marine classification society approvals
Comparison
How C35 Compares
An honest comparison so you can rule this product in or out quickly
| Kit Family | Voltage Class | Conductor Range | Typical Position |
|---|---|---|---|
| C1 | 0.6/1 (1.2) kV | 4 to 400 mm² | LV boards street cabinets duct joints |
| C15 | 8.7/15 (17.5) kV | 25 to 400 mm² | RMU pole top duct joints |
| C35 | 26/35 (40.5) kV | 50 to 630 mm² | Primary substations collector circuits |
Use Guide
How to Select and Install C35
The sequence our engineers walk customers through on every first installation
-
01
Verify U0 and Cable Construction
C35 covers 26/35 (40.5) kV. Confirm the cable is rated 26/35 kV and note screen type wire or tape.
-
02
Select Indoor Outdoor or Joint
NSY indoor WSY outdoor with rain sheds JSY joint. Conductor bands are 50 to 120 150 to 240 300 to 400 and 500 to 630 mm².
-
03
Prepare to the Kit Drawing
At 35 kV the screen cut back position and the semiconductive removal are the two dimensions that decide whether the termination survives.
-
04
Clean Thoroughly
Any semiconductive residue left on the insulation surface becomes a discharge site. Use the supplied solvent wipes in one direction only.
-
05
Fit Stress Control and Insulation
Apply the stress control tube then the non tracking insulating layers building the wall thickness the kit specifies.
-
06
Restore Screen and Seal
Fit braid springs and sealing tubes so the metallic screen is continuous and the ends are watertight.
-
07
Set Shed Spacing Outdoors
Fit rain sheds at the spacing shown for your site pollution class then inspect for uniform shrink and adhesive flow.
FAQ
C35 Frequently Asked Questions
The questions buyers ask before they place an order
Can C35 be used on a 33 kV network
What is the largest conductor you cover
How many rain sheds are supplied outdoors
Does the kit include a screen earth connection
What is the difference between C35 and a cold shrink termination
Do you provide installation training
Is a type test report available
Still need an answer ask our engineers on WhatsApp
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VIEW DETAILSGet a Quotation for C35
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