JRSY-10 10kV Heat Shrink Cable Joint Kit
When a medium-voltage underground cable run needs extending, or a fault section requires immediate replacement, the 10kV heat shrink cable joint kit is what keeps the network alive. The JRSY-10 Series handles straight-through splicing for both single-core and three-core 6/10kV and 8.7/15kV XLPE cables across the full commercial conductor range.
Every kit leaves our Hubei facility with a verified partial discharge result of ≤2pC at 13kV — tested and recorded by the Power Industry's own inspection authority. For utility maintenance teams and underground cable splice contractors, that number means one thing: the joint will not become the next fault point on the network.
Our 40,000㎡ facility ships over 80,000 sets monthly, which means distributors supplying emergency repair stock never face the "out of stock" call at the worst moment. Full OEM packaging is supported for underground cable joint brands and utility-approved product programs.
- Zhizheng
- Hubei, China
- 7–15 Days (standard stock sizes); 15–20 Days (bulk/OEM orders)
- 80,000 Sets / Month
- Information
10kV Heat Shrink Cable Joint Kit — Straight-Through Splice Manufacturer
A cable joint failure buried two meters underground costs more to fix than the original installation. The Zhizheng JRSY-10 Series is designed to ensure that never happens. Built specifically for straight-through intermediate jointing of 6/10kV and 8.7/15kV XLPE insulated power cables, these kits are the go-to solution for underground distribution extensions, fault-section replacements, and planned cable route modifications. Unlike a termination kit — which connects a cable to a panel or switchgear — a cable joint connects one cable directly to another, and the buried environment it lives in demands a tighter, more moisture-resistant seal from day one.
Manufactured in our 40,000㎡ production base in Hubei, China, every JRSY-10 kit is produced under ISO9001-controlled conditions and verified against the full IEC and GB type test protocol before leaving the facility. The result is a product that global distribution contractors and utility maintenance teams have been relying on for over 20 years.
Joint vs. Termination — Why the Application Difference Matters
Buyers new to medium-voltage cable accessories often ask why they cannot use a termination kit for a splice. The answer comes down to the operating environment. A termination head sits exposed in a switchroom or on a pole — accessible, inspectable, replaceable. A straight-through joint lives in a cable trench, duct bank, or direct-buried position. It must handle:
Continuous soil pressure and mechanical load on the joint body
Groundwater ingress risk across a 30-year service life
Thermal cycling from full-load heating and overnight cooling, repeated thousands of times
No routine inspection — what goes in the ground must work indefinitely
The JRSY-10 kits are engineered specifically around these buried-service demands, with optional adhesive-lined components that flow into conductor connector irregularities on shrinking, closing every potential water ingress path permanently.
Key Engineering Features
Verified ≤2pC Partial Discharge: While the standard permits up to 20pC at 13kV, every JRSY-10 batch achieves ≤2pC. In a buried joint, partial discharge cannot be detected until failure occurs — so getting this right at the factory is non-negotiable.
105kV Impulse Voltage Rated: Lightning and switching surges travel the full cable length and arrive at every joint on the route. Ten consecutive impulse shots at 105kV, both polarities — no breakdown, no flashover.
Thermal Cycling Validated: Three full load cycles from ambient to 90°C–95°C conductor temperature, each cycle running five hours of heating followed by three hours of cooling. The joint geometry and seal integrity hold throughout.
Chemical & UV Resistant Outer Layer: For joints installed in cable troughs or above-grade transition points, the outer heat-shrink jacket resists common industrial chemicals, hydrocarbon contamination, and extended UV exposure.
Cable Sheath Repair Capability: Beyond new-build jointing, the JRSY-10 kits are approved for outer sheath repair on damaged cable runs — a useful specification for utility maintenance contracts where the kit serves dual procurement purposes.
Certified Performance Test Results
All test data independently verified by the Electrical Equipment Quality Inspection and Testing Center of the Power Industry.
| Test Item | Standard Requirement | Zhizheng Result | Status |
|---|---|---|---|
| 1 min Power Frequency Voltage | 45 kV / 1 min, no flashover | 45 kV / 1 min — no flashover or breakdown | Pass |
| Partial Discharge — Initial | At 13 kV ≤ 20 pC | All phases ≤ 2 pC at 13 kV | Pass |
| Load Cycle Test | 3 cycles at 90°C–95°C (5h heat / 3h cool) | 3 cycles completed — no degradation | Pass |
| Partial Discharge — Post Load Cycle | At 13 kV ≤ 20 pC | All phases ≤ 2 pC at 13 kV | Pass |
| Impulse Voltage Test | 105 kV × 10 shots, both polarities | 105 kV × 10 shots — no breakdown in any phase | Pass |
| 15 min DC Voltage (Negative) | -52 kV / 15 min, no breakdown | -52 kV / 15 min — no flashover or breakdown | Pass |
| 4h Power Frequency Voltage | 35 kV / 4 h, no breakdown | 35 kV / 4 h — no breakdown in any phase | Pass |
| Appearance Inspection | No cracks, no deformation | Clean surface — no cracks or deformation | Pass |
Model Selection — JRSY-10 Series
Available for single-core and three-core 10kV XLPE cables. Custom configurations for non-standard conductor sizes are available on request.
| Cable Core Type | Model | Conductor Cross-Section (mm²) |
|---|---|---|
| Single-Core (1C) | JRSY-10 / 1×1 | 25 – 50 |
| JRSY-10 / 1×2 | 70 – 120 | |
| JRSY-10 / 1×3 | 150 – 240 | |
| JRSY-10 / 1×4 | 300 – 400 | |
| JRSY-10 / 1×5 | 500 – 630 | |
| Three-Core (3C) | JRSY-10 / 3×1 | 25 – 50 |
| JRSY-10 / 3×2 | 70 – 120 | |
| JRSY-10 / 3×3 | 150 – 240 | |
| JRSY-10 / 3×4 | 300 – 400 |
Where These Kits Get Specified
The JRSY-10 series is regularly called out by specification on the following project types:
Urban Underground Distribution Networks: City grid reinforcement and cable route extensions where overhead lines are being replaced with buried circuits.
Industrial Facility Upgrades: Factory load increases requiring longer cable runs that exceed available drum lengths — jointing becomes the practical solution.
Utility Emergency Repair Stock: Grid operators maintain JRSY-10 kits as emergency spares for rapid fault reinstatement after dig-ins or third-party cable damage.
Renewable Energy Plant Internal Cabling: Solar and wind farm medium-voltage collector systems often include multiple straight-through joints on long underground feeder runs between turbines or inverter stations.
Tunnel & Rail Infrastructure: Trackside power and traction auxiliary cables in confined routes where controlled jointing positions are engineered into the cable route design from the start.
Procurement & Technical Questions
Q1: For the same 10kV XLPE cable, how do I decide between the JRSY-10 joint kit and the RSY-10 termination kit?
A: The application determines the product. If the cable end connects to a switchgear cubicle, transformer terminal, or distribution panel — you need the RSY-10 termination kit. If you are splicing two cable drums end-to-end in a trench, or cutting out a damaged section and bridging the gap with a new conductor connector — you need the JRSY-10 joint kit. One project often requires both, and we can supply the full scope under a single order.
Q2: Can the JRSY-10 be used for cable sheath repair without a full conductor splice?
A: Yes. Where the cable conductor and insulation are intact but the outer metallic screen and PVC sheath have been mechanically damaged, the outer components of the JRSY-10 kit can be used to restore screen continuity and sheath integrity. This is a common utility maintenance application. Contact our technical team with the damage description and we will confirm the correct kit configuration.
Q3: What conductor connector is recommended for use inside the joint?
A: We supply compression-type copper or aluminum conductor connectors as a kit add-on. The compression connector must be installed before the heat-shrink process begins. If you are using your own preferred connector brand, send us the OD of the assembled connector and we will confirm compatibility with the relevant JRSY-10 model before you order.
Q4: Do you supply these kits to electrical distributors carrying emergency repair stock?
A: Yes, and this is one of our strongest market segments. Many utility-appointed distribution contractors carry JRSY-10 stock under approved product frameworks. We support consignment stock programs, rapid replenishment orders, and OEM-labeled kits for distributors operating their own approved brand within utility supply chains.
Need Joints, Terminations, or Both? One Supplier Covers It All
Most 10kV cable projects require a combination of straight-through joints and indoor/outdoor terminations on the same route. Zhizheng supplies the complete accessory set — JRSY-10 joints, NRSY-10 indoor terminations, and WRSY-10 outdoor terminations — from a single factory in Hubei.
Share your cable route schedule or bill of materials with us. We will return a complete accessory list with factory pricing within 24 hours. Contact now!
