Heat Shrink Cable Accessory Kits

C15 Medium Voltage Heat Shrink Cable Accessory Kits 8.7/15 kV

Indoor outdoor and joint kits for 8.7/15 (17.5) kV single core and three core cable tested to IEC 60502-4

Voltage class: 8.7/15 (17.5) 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

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C15 Medium Voltage Heat Shrink Cable Accessory Kits 8.7/15 kV manufactured by UPM Heat Shrink

C15 · Cable Accessory Kits

Product Overview

What C15 Does

Single core, 3 cores cable accessories. Suitable for protection of indoor and outdoor electric power cable joint and termination up to 8.7/15 (17.5) kV.

Indoor outdoor and joint kits for 8.7/15 (17.5) kV single core and three core cable tested to IEC 60502-4 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

An accessory family that satisfies both IEC 60502-4 and GB/T 12706.4 in one submission
Indoor outdoor and joint variants that share the same installation method so crews train once
Partial discharge held to 10 pC maximum at ambient and at operating temperature
1000 hours of salt fog at 1.25 U0 for the outdoor variant so coastal sites stay in service
Complete kit including stress control non tracking insulation screen continuity and sealing

Who It Is For

Who Benefits Most from C15

The buyers and site teams this product was designed around

Distribution Utilities

Ring main units substation feeders and 11 kV or 15 kV overhead to underground transitions where an approved accessory is a licence condition.

EPC Contractors on Grid Projects

Bulk purchase of a single accessory family across a whole substation or feeder replacement programme.

Industrial Plant Maintenance Teams

Steel plants cement works refineries and mines that hold their own MV spares and joint their own cable during shutdowns.

Renewable Collector Networks

Wind farm and utility solar collector circuits at 15 kV class where accessories are installed in the field far from a workshop.

Problems It Solves

Problems This Product Removes

Every one of these is a failure mode we have seen on real networks

Field Stress at the Screen Cut Back Causes Early Failure

Cutting the metallic screen creates a sharp electrical discontinuity. The C15 kit includes a stress control layer that redistributes that field so partial discharge stays inside the 10 pC limit.

Type Test Evidence Is Demanded Before Approval

Utilities will not accept an accessory without a full IEC 60502-4 test record. C15 is designed against the complete test sequence including impulse heating cycles thermal short circuit humidity and salt fog.

Outdoor Terminations Flash over in Polluted Air

Salt coastal air cement dust and industrial pollution build a conducting film. The outdoor WSY variant uses non tracking material plus rain sheds to lengthen the creepage path.

Joints Under Water Fail at the Interface

Duct and manhole joints sit in water for years. The C15 joint is tested for 30 heating cycles under 1 m of water at 2.5 U0 with no breakdown.

Application Scenarios

Where It Is Used

Ring Main Unit Terminations

Three core 15 kV XLPE entering an RMU where space is tight and the termination must be short.

Overhead to Underground Transitions

Outdoor pole terminations exposed to UV rain and airborne pollution.

Straight Through Joints in Manholes

Feeder joints in flooded chambers that must survive continuous immersion.

Substation Transformer Tails

Single core terminations into a transformer cable box with defined phase spacing.

Wind Farm Collector Circuits

Tower base and switching station terminations at 15 kV class in remote locations.

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

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.

Extrusion and irradiation workshop at the UPM Heat Shrink factory in Dalian China — Extrusion and processing workshop in Dalian. Line side inspection stations let an operator check wall thickness and concentricity without stopping the run.

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 C15 Compares

An honest comparison so you can rule this product in or out quickly

Accessory Type	Where It Is Used	Creepage Strategy	Relative Cost
C15 NSY indoor termination	Switchgear cable box RMU panel	Non tracking tube only	Lowest
C15 WSY outdoor termination	Pole top open air substation	Non tracking tube plus rain sheds	Medium
C15 JSY joint	Duct manhole direct buried	Sealed with semiconductive screen restored	Medium
Cold shrink termination	Same positions	Silicone rubber body	Highest

Use Guide

How to Select and Install C15

The sequence our engineers walk customers through on every first installation

01
Match Voltage Class First

C15 is for 8.7/15 (17.5) kV. Do not fit it on a 26/35 kV circuit. Use C35 above 15 kV class.
02
Choose Indoor Outdoor or Joint

NSY is an indoor termination WSY is an outdoor termination and JSY is a joint. The choice sets whether rain sheds are included.
03
Read the Conductor Band

Bands are 25 to 50 70 to 120 150 to 240 and 300 to 400 mm². The last digit of the part number is the band.
04
Prepare and Clean

Remove outer sheath armour and semiconductive screen to the dimensions in the kit drawing. Every trace of semiconductive material must be cleaned off the insulation.
05
Apply Stress Control

Fit the stress control tube over the screen cut back so it overlaps both the screen and the insulation by the stated distance.
06
Insulate Seal and Screen

Apply the non tracking insulating tubes then restore screen continuity with the supplied braid and constant force spring then seal the ends with adhesive lined tubing.
07
Add Rain Sheds Outdoors

Fit the supplied Y3 sheds at even spacing to build the creepage distance the site pollution level requires.

FAQ

C15 Frequently Asked Questions

The questions buyers ask before they place an order

Does C15 comply with IEC 60502-4

Yes. C15 is designed and tested against IEC 60502-4:2010-12 and GB/T 12706.4 covering AC and DC voltage partial discharge impulse heating cycles immersion thermal and dynamic short circuit humidity and salt fog. A test report is available on request via WhatsApp or email.

What is the difference between NSY WSY and JSY

NSY is an indoor termination WSY is an outdoor termination that includes rain sheds for extra creepage and JSY is a straight through joint. All three share the same core materials.

Can I use C15 on an 11 kV network

Yes. An 11 kV three core cable is normally 6.35/11 kV rated and sits inside the 8.7/15 (17.5) kV envelope. Confirm your cable U0 value with us before ordering.

How much partial discharge does the design allow

The design limit is 10 pC maximum at 1.73 U0 both at ambient temperature and at maximum conductor operating temperature.

Is a screen continuity braid included

Yes. The kit includes tinned copper braid roll spring and sealing components so the metallic screen is electrically restored across the joint.

How should kits be stored before use

Store sealed in the original carton between 5 and 35 °C away from direct sunlight. Shelf life in these conditions is 5 years.

Do you supply private label kits

Yes. We print your brand on the carton the instruction sheet and the individual bags. Minimum quantity and lead time depend on the configuration so ask us on WhatsApp.

Still need an answer ask our engineers on WhatsApp