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TE Connectivity RAYCHEM POLT 3XIH1-L12A Heat-Shrink Power Cable Terminal
3XIH1-L12A is the specification code of TE Connectivity RAYCHEM brand POLT series ≤12kV 3-core heat-shrink power cable terminal. The complete model is usually marked as POLT-12D/3XIH1-L12A. It is suitable for outdoor terminal installation of polymer insulated power cables such as Cross-Linked Polyethylene (XLPE) and Polyethylene (PE), providing reliable electrical insulation and environmental protection.
- Model Segment Definition
| Segment | Meaning | Description |
| 3 | Cable Core Number | Specially for 3-core cables |
| X | Insulation Type | Suitable for polymer insulated cables (XLPE/PE/EPR) |
| IH1 | Shield Type & Size Specification | IH = Copper Wire Shield; 1 = Conductor cross-section 70-120mm² |
| L12A | Voltage Class & Mounting Type | L12 = Rated voltage ≤12kV; A = Standard outdoor terminal |
| POLT-12D | Product Series | POLT = RAYCHEM heat-shrink power cable terminal series; 12D = 12kV outdoor type |
- Core Specification Parameters
| Parameter Category | Technical Index | Remarks |
| Basic Characteristics | ||
| Product Type | Heat-shrink Power Cable Terminal | Outdoor installation, polymer insulation system |
| Brand | TE Connectivity RAYCHEM | POLT series, industry standard product |
| Applicable Cable Type | 3-core polymer insulated power cable | Insulation material: XLPE, PE, EPR, etc. |
| Rated Voltage | ≤12kV (U0/U=8.7/15kV) | Compliant with IEC 60502-2 |
| Cable Shield Type | Copper Wire Shield | Not applicable for copper tape shielded cables |
| Conductor Specification | ||
| Applicable Conductor Section | 70-120mm² | Copper conductor |
| Conductor Outer Diameter | 14.0-22.0mm | Single core conductor diameter |
| Insulation Outer Diameter | 25.0-35.0mm | Single core insulation diameter |
| Overall Cable Outer Diameter | 55.0-75.0mm | Outer diameter of complete 3-core cable |
| Physical Characteristics | ||
| Total Terminal Length | 450mm | Standard outdoor type length |
| Material Composition | Cross-linked Polyolefin Heat-shrink Material | Weather resistance, UV resistance, aging resistance |
| Color | Black | Industrial standard color, anti-UV |
| Installation Method | Heat shrink installation | Special heating tool required (≥300℃) |
| Environmental Conditions | ||
| Operating Temperature | -40°C ~ +90°C | Wide temperature range, suitable for harsh environments |
| Ingress Protection | IP68 | Fully dustproof and waterproof, operable under immersion |
| Weather Resistance | Compliant with IEC 60811-3-1 | UV resistance, ozone resistance, chemical corrosion resistance |
| Electrical Performance | ||
| Insulation Resistance | ≥10¹⁴Ω | Normal condition, ensure excellent insulation performance |
| Dielectric Strength | ≥45kV/1min | Breakdown strength of terminal insulation layer |
| Partial Discharge | ≤10pC | Under 1.73U0 voltage, maintain low partial discharge level |
| Creepage Distance | 630mm | Meet pollution level requirements for 12kV class |
- Accessory List & Mounting Parts
| Part No. | Name | Function | Q’ty |
| 3XIH1-L12A Main Kit | Heat-shrink Tube Assembly | Provide insulation, sealing and stress control | 1 Set |
| Stress Control Tube | Non-linear Heat-shrink Tube | Uniform electric field distribution, eliminate electric stress concentration | 3 pcs (1 per core) |
| Insulation Tube | Main Insulation Heat-shrink Tube | Main insulation protection | 1 pc (for 3 cores) |
| Sealing Tube | Waterproof Sealing Heat-shrink Tube | Seal the joint between cable outer sheath and terminal | 1 pc |
| Shed | Anti-pollution Flashover Heat-shrink Shed | Increase creepage distance and anti-fouling performance | 3 pcs |
| Copper Mesh / Grounding Wire | Shield Grounding Wire | Ground connection for cable shielding layer | 1 Set |
| Filling Mastic | Insulation Filling Material | Fill gaps between cores, improve insulation performance | 1 pc |
| Cleaning Cloth / Sandpaper | Surface Treatment Tools | Clean cable insulation surface, improve adhesion | 1 Set |
| Installation Manual | Operation Guide | Detailed installation steps and precautions | 1 Copy |
- Competitor & Cross-Brand Equivalent
| Brand | Replacement Model | Similar Features | Differences |
| ABB | APIT-12/3-70-120 | 12kV 3-core, 70-120mm, copper wire shield | Cold-shrink technology, no heating required, higher cost |
| 3M | 5623P-12 | 12kV 3-core, 70-120mm, copper wire shield | Cold-shrink type, easy installation, permanent elasticity |
| Changyuan | WS-12/3.2 | 12kV 3-core, 70-120mm, copper wire shield | Heat-shrink type, cost-effective, high domestic market share |
| Walsin | WRS-12/3-70-120 | 12kV 3-core, 70-120mm, copper wire shield | Heat-shrink type, material performance close to RAYCHEM |
| RAYCHEM Internal Replacement | 3XIH4-L12A | 12kV 3-core, 150-240mm, copper wire shield | For larger conductor section, same terminal length |
- Selection Guidelines & Replacement Solutions
5.1 Key Selection Parameters
| Parameter | Selection Key Points | Recommended Standard |
| Voltage Matching | Must match cable rated voltage | 12kV terminal for 8.7/15kV cable; not for higher voltage class |
| Core Number | Terminal core number shall be consistent with cable | 3-core terminal only for 3-core cable, not for single-core or 4-core |
| Conductor Section | Terminal range must cover cable conductor section | 70-120mm² terminal applicable to 70、95、120mm² cables |
| Shield Type | Terminal must match cable shield type | IH for copper wire shield; OH for copper tape shield |
| Installation Environment | L type for outdoor; I type for indoor | Outdoor site must adopt L type with sheds |
5.2 Replacement Recommendations
Mismatched conductor section: Select corresponding range model, e.g. 150-240mm² use 3XIH4-L12A
Different shield type: Copper tape shield cable adopt 3XOH1-L12A
Indoor installation: Choose 3XIH1-I12A (without sheds)
Easier installation requirement: Adopt RAYCHEM cold-shrink terminal (RST series), no heating tool needed
5.3 Application Precautions
- Check cable insulation condition before installation to ensure no damage and no moisture.
- Strictly follow installation manual; control heating temperature at 300-350℃ and heating time.
- Clean and polish core insulation surface tightly to ensure close fitting of heat-shrink tube.
- Reliably connect shielding grounding wire to guarantee electrical safety.
- Perform insulation test and partial discharge test after installation; put into operation only after qualified.
- Applicable for overhead, tunnel, cable trench and other outdoor / semi-outdoor occasions; not suitable for underwater use.
- Typical Application Scenarios
10kV/12kV distribution line outdoor cable terminals
12kV cable outgoing terminals of substation & switch station
12kV internal power distribution cable terminals for industrial enterprises
12kV cable terminals for new energy projects such as wind power & photovoltaic power generation
12kV cable terminal replacement & renovation of urban power grid
