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Model Segment Definition
| Segmento | Significado | Observaciones |
| 3*70 | Applicable cable specification | 3-core cable, conductor cross-section per core 70 mm² |
| QTII | Código de serie del producto | 3M 2nd generation pre-expanded cold shrink cable termination sistema (Quality Termination II) |
| 94 | Product type code | Outdoor cold shrink termination, suitable for 18/30 kV voltage level |
| EB | Insulation material & structure code | Silicone rubber insulation with integrated stress control unit |
| 63 | Conductor cross-section range code | Suitable for 50–150 mm² conductors (some versions fit 95–240 mm²) |
| 4 | Core number & application code | Special for outdoor application of 3-core cables |
- Parámetros de especificación principales
Parámetros eléctricos
| Parámetro | Valor | Descripción |
| Tensión nominal | 18/30 kV (máx. 36 kV) | Suitable for medium voltage power system |
| Max System Voltage | 24 kV | Cumple con los estándares IEC |
| Applicable Cable Type | Wire shield / Tape shield XLPE/EPR insulated power cable | Dedicated for polymer insulated cables |
| Insulation Outer Diameter Range | 21.3–35.0 mm | Typical insulation outer diameter for 3×70 mm² cable |
| Power Frequency Withstand Voltage | 65 kV / 1 mín. | Factory test standard |
| Partial Discharge | ≤10 pC | High voltage performance index |
Mecánico & Parámetros ambientales
| Parámetro | Valor | Descripción |
| Insulation Material | High dielectric constant silicone rubber | Permanent radial pressure, excellent weather resistance |
| Protección de ingreso | IP68 | Fully dustproof and waterproof, suitable for harsh outdoor environments |
| Temperatura de funcionamiento | -40℃ ~ +90℃ | Amplio rango de temperatura, adapts to extreme climates |
| Vida útil mecánica | ≥30 years | Diseño sin mantenimiento, larga vida útil |
| Método de instalación | Cold shrink type (no heating tools required) | Automatically shrinks by pulling out the support core rope |
| Peso | Aprox.. 1.2 kg/set | Complete with all components, convenient for site installation |
Applicable Cable Parameters
| Parámetro | Rango de aplicación | Observaciones |
| Sección transversal del conductor | 3×50–150 mm² | Some versions fit 3×95–240 mm² |
| Conductor Material | Cobre / Aluminum | Compatible with two mainstream conductor materials |
| Insulation Thickness | 10–15 mm | Standard insulation thickness for medium voltage cables |
| Shield Type | Braided copper wire shield / Wrapped copper tape shield | Fits two common shielding structures |
- Lista de accesorios
| Nombre del accesorio | Qty | Objetivo |
| QTII Cold Shrink Termination Body (with integrated stress control) | 3 piezas | Provide insulation and stress control |
| Silicone Rubber Insulation Tube | 3 piezas | Cable insulation restoration |
| Stress Control Mastic | 1 colocar | Stress control at branch joint and shield cut-off position |
| Sealing Mastic | 1 colocar | Top sealing of termination |
| Cleaning Kit (CC-2) | 1 colocar | Pre-cleaning treatment for cable surface |
| Copper Mesh Grounding Wire | 3 piezas | Grounding connection for shielding layer |
| Phase Color Marker (Yellow/Green/Red) | 3 conjuntos | Phase identification |
| Installation Instruction Manual | 1 copy | Detailed installation guidance |
| Support Core Rope Pulling Tool | 1 pc | Assist in pulling core rope during installation |
- Competidor & Comparación entre marcas
| Marca | Modelo | Diferencia principal | Escenario de aplicación |
| Original 3M | 94-EB63-3 | Indoor type, 18/30 kV, 3×25–150 mm² | Indoor connection of medium voltage distribution equipment |
| Original 3M | 94-EB63-1 | Single-core outdoor type, 18/30 kV, 1×50–150 mm² | Outdoor termination for single-core cable |
| TEJIDO | Cold Shrink Termination Series | Similar structure, slightly higher price, same applicable range | Power system supporting, brand preference |
| Schneider | Cold Shrink Termination Series | Different stress control design, slight difference in installation steps | Industrial automation system supporting |
| Alternativa Doméstica | Changyuan / Walen Cold Shrink Termination | Price about 1/2–2/3 of 3M, performance meets national standard | Budget-sensitive projects, non-critical circuits |
- Directrices de selección & Soluciones de reemplazo
5.1 Parámetros de selección clave
Voltage Level Matching: Confirm system voltage is 18/30 kV; not applicable for 12 kV or above 36 kV systems.
Cable Specification Confirmation:
Sección del conductor: 3×70 mm² is well compatible within 50–150 mm² range.
Insulation outer diameter: Must be within 21.3–35.0 mm; otherwise replace model.
Shield type: Only for wire/tape shielded cables; not for non-shielded or aluminum sheathed cables.
Entorno de instalación:
Outdoor application: Choose 94 serie (outdoor type) with UV resistance and weatherability.
Indoor application: Select indoor type 94-EB63-3.
Installation Tools: No heating tools required; only basic electrician tools and cleaning supplies needed.
5.2 Soluciones de reemplazo recomendadas
| Escenario de aplicación | Recommended Replacement Model | Ventajas |
| Direct replacement with same specification | 3M 94-EB63-4 (50–150 mm² applicable) | Original genuine, fully compatible |
| Large cross-section upgrade | 3M 94-EB63-4 (95–240 mm² applicable) | Fits larger cross-section cables, reserved for future expansion |
| Indoor installation | 3M 94-EB63-3 | Dedicated indoor type, more compact structure |
| Optimización de costos | Changyuan CYLS-30/3.1 | High-quality domestic alternative, obvious price advantage |
| Actualización de rendimiento | 3M QTIII Series | 3rd generation cold shrink technology, mayor confiabilidad |
5.3 Precauciones de instalación
- Cable Pre-treatment
Thoroughly clean cable surface with 3M CC-2 cleaning kit.
Keep smooth transition at shield cut-off to avoid tip discharge.
- Installation Procedure
Install branch joint sealing and stress control mastic first, then mount cold shrink termination body.
Pull the core rope steadily at constant speed to avoid termination distortion.
- Safety Regulations
Installers must hold medium voltage cable construction qualification.
Confirm cable power off and fully grounded before construction.
- Quality Control
Perform insulation test and partial discharge test after installation.
Record installation date and test data for future maintenance.
- Product Features Summary
- Maintenance-free Design: Silicone rubber provides permanent radial pressure without regular inspection.
- Fácil instalación: Cold shrink technology requires no heating tools; single-person installation available.
- Alta confiabilidad: Integrated stress control unit effectively reduces partial discharge risk.
- Fuerte adaptabilidad ambiental: -40℃~+90℃ operating temperature and IP68 rating suit various harsh environments.
- Amplia compatibilidad: Compatible with multiple specifications of XLPE/EPR insulated cables with high versatility.
3M Medium Voltage Cold Shrink Cable Termination Model List & Guía de selección
- Explicación de la regla de nomenclatura del modelo
3M medium voltage cold shrink cable termination model consists of Series Code + Voltage Level + Entorno de instalación + Insulation OD / Sección transversal del conductor + Core Number, clearly reflecting core parameters:
| Segmento | Significado | Ejemplo |
| QTII/QTIII | Product generation series | QTII = 2nd generation pre-expanded cold shrink; QTIII = 3rd generation cold shrink technology |
| 56xx/76xx | Código de serie del producto | 56xx = QTII series; 76xx = QTIII series |
| 94/7620/7680 | Voltaje & environment code | 94 = 18/30kV outdoor; 7620 = 15kV indoor; 7680 = 35kV outdoor |
| EB63/4-T/150 | Applicable range code | EB63 = fits 50–150mm²; 4-T = fits 23.4–30.0mm insulation OD |
| -0.75 | Core number code | -3 = 3-core indoor; -4 = 3-core outdoor; -1 = single-core outdoor |
| -CN/-TI | Regional / Special mark | -CN = China market; -TI = Special insulation type adaptation |
- Descripción general de la serie de productos
3M medium voltage cold shrink cable terminations are mainly divided into two core series: QTII (2nd Gen) and QTIII (3rd Gen), covering 5–35kV voltage level, single-core/3-core, full indoor/outdoor applications.
| Serie | Generation | Rango de voltaje | Características principales | Aplicación típica |
| QTII 5600 Serie | 2nd Gen | 5–35 kV | Pre-expanded cold shrink, silicone rubber insulation, integrated stress control | General medium voltage distribution system, rentable |
| QTIII 7600 Serie | 3rd Gen | 5–35 kV | Grease-free, lower partial discharge, mayor confiabilidad | Critical distribution circuits, high reliability required occasions |
| QTII 5680 Serie | 2nd Gen | 18/30–26/35 kV | Outdoor type, UV resistance, superior weatherability | Outdoor cable termination for 18/30kV and above |
| QTIII 7690 Serie | 3rd Gen | 5–35 kV | Inverted shed design, anti-pollution flashover, suitable for heavily polluted areas | Coastal / industrial area outdoor application |
- Detailed Model List
3.1 QTII Series (2nd Gen Cold Shrink, 5600 Serie)
3.1.1 18/30kV (24kV) Outdoor Type (94 Serie)
Características principales: Silicone rubber insulation, with rain shed, integrated stress control, suitable for wire/tape shielded XLPE/EPR cables
| Modelo | Applicable Cable Spec | Insulation OD Range | Core Type | Observaciones |
| 94-EB63-4 | 3×50–150 mm² | 21.3–35.0 mm | 3-core Outdoor | Most common model for 3×70mm² cable |
| 94-EB63-3 | 3×50–150 mm² | 21.3–35.0 mm | 3-core Indoor | No rain shed, indoor dedicated |
| 94-EB63-1 | 1×50–150 mm² | 21.3–35.0 mm | Single-core Outdoor | Outdoor termination for single-core cable |
| 94-EB64-4 | 3×95–240 mm² | 28.0–45.0 mm | 3-core Outdoor | For large cross-section cables |
| 94-EB64-1 | 1×95–240 mm² | 28.0–45.0 mm | Single-core Outdoor | Outdoor termination for large single-core cable |
3.1.2 8.7/15kV (20kV) Serie
Características principales: Suitable for 15kV system, estructura compacta, fácil instalación
| Modelo | Applicable Cable Spec | Insulation OD Range | Entorno de instalación |
| 5601PST-G-CN | 3×35–70 mm² | 16.0–28.0 mm | Interior / Exterior |
| 5602PST-G1-CN | 3×95–150 mm² | 21.0–35.0 mm | Interior / Exterior |
| 5602PST-G2-CN | 3×185–240 mm² | 28.0–45.0 mm | Interior / Exterior |
| 5603PST-G-CN | 3×300–500 mm² | 35.0–55.0 mm | Interior / Exterior |
| 5620k | 1×35–400 mm² | 16.0–45.0 mm | Single-core Outdoor |
3.1.3 26/35kV (40.5kV) Serie
Características principales: Suitable for 35kV system, alto rendimiento de aislamiento, corona resistance design
| Modelo | Applicable Cable Spec | Insulation OD Range | Core Type |
| 5682 | 1×50–150 mm² | 21.0–35.0 mm | Single-core Outdoor |
| 5684 | 1×95–240 mm² | 28.0–45.0 mm | Single-core Outdoor |
| 5683 | 3×50–150 mm² | 21.0–35.0 mm | 3-core Outdoor |
| 5685 | 3×95–240 mm² | 28.0–45.0 mm | 3-core Outdoor |
3.2 QTIII Series (3rd Gen Cold Shrink, 7600 Serie)
Ventajas principales: Grease-free, lower partial discharge (≤5pC), integrated environmental sealing, easier installation
3.2.1 8.7/15kV (20kV) Serie
| Modelo | Applicable Cable Spec | Insulation OD Range | Entorno de instalación | Características |
| 7620-S-3 | 3×35–70 mm² | 16.0–28.0 mm | 3-core Indoor | No rain shed, indoor use |
| 7620-S-4 | 3×35–70 mm² | 16.0–28.0 mm | 3-core Outdoor | With rain shed, outdoor use |
| 7620-S-1 | 1×35–70 mm² | 16.0–28.0 mm | Single-core Indoor | Single-core indoor termination |
| 7620-S-2 | 1×35–70 mm² | 16.0–28.0 mm | Single-core Outdoor | Single-core outdoor termination |
| 7693-S-4-3G | 3×95–150 mm² | 23.4–30.0 mm | 3-core Outdoor | For medium cross-section cables |
3.2.2 18/30kV (24kV) Serie
| Modelo | Applicable Cable Spec | Insulation OD Range | Entorno de instalación | Observaciones |
| 7642-T-110 | 3×50–150 mm² | 21.3–35.0 mm | 3-core Outdoor | Replacement for QTII 94-EB63-4 |
| 7642-T-150 | 3×95–240 mm² | 28.0–45.0 mm | 3-core Outdoor | Replacement for QTII 94-EB64-4 |
| 7642-T-1 | 1×50–150 mm² | 21.3–35.0 mm | Single-core Outdoor | Single-core outdoor termination |
3.2.3 26/35kV (40.5kV) Serie
Características principales: High voltage level, anti-pollution flashover design, adecuado para entornos hostiles
| Modelo | Applicable Cable Spec | Insulation OD Range | Entorno de instalación | Características de diseño |
| 7680-S-4 | 3×50–150 mm² | 21.0–35.0 mm | 3-core Outdoor | Standard rain shed design |
| 7680-S-1 | 1×50–150 mm² | 21.0–35.0 mm | Single-core Outdoor | Standard rain shed design |
| 7690-S-INV-3RJS | 3×95–240 mm² | 28.0–45.0 mm | 3-core Outdoor | Inverted shed, anti-pollution flashover |
| 7695-T-150 | 3×300–500 mm² | 35.0–55.0 mm | 3-core Indoor | For large cross-section cables |
3.3 Serie de aplicaciones especiales
3.3.1 High Fault Current Series
Características principales: Suitable for high short-circuit current system, enhanced insulation design
| Modelo | Voltage Level | Applicable Cable Spec | Características |
| 7650-S-HSG | 5–35 kV | 1×50–240 mm² | Single-core with connector |
| 7660-S-HSG | 5–35 kV | 3×50–240 mm² | 3-core with connector |
3.3.2 Special Cable Adaptation Series
Características principales: Suitable for JCN cables (sheath concentric neutral) and special shielding structure cables
| Modelo | Voltage Level | Applicable Cable Type | Insulation OD Range |
| 7654-S-4-TI | 5–25/28 kV | JCN Cable | 21.1–38.9 mm |
| 7654-S-1-TI | 5–25/28 kV | JCN Cable | 21.1–38.9 mm |
- General Specification Comparison Table
General Electrical Parameters (All Series)
| Parámetro | Valor | Descripción |
| Insulation Material | High dielectric constant silicone rubber | Permanent radial pressure, excellent weather resistance |
| Protección de ingreso | IP68 | Fully dustproof & waterproof for harsh outdoor conditions |
| Temperatura de funcionamiento | -40℃ ~ +90℃ | Wide temperature range for extreme climates |
| Vida mecánica | ≥30 years | Maintenance-free long service life |
| Método de instalación | Cold shrink type (no heating required) | Self-shrinking by pulling support rope |
| Partial Discharge | QTII: ≤10 pC | HV performance index; QTIII better |
| QTIII: ≤5 pC | ||
| Power Frequency Withstand Voltage | 2.5× rated voltage / 1 mín. | Factory acceptance test standard |
Series Key Parameter Comparison
| Serie | Rango de voltaje nominal | Applicable Conductor Cross-section | Insulation OD Range | Installation Env | Nivel de precio |
| QTII 94 Serie | 18/30 kV | 50–240 mm² | 21.3–45.0 mm | Indoor/Outdoor | Mid-to-high |
| QTII 5600 Serie | 8.7/15 kV | 35–500 mm² | 16.0–55.0 mm | Indoor/Outdoor | Mid-range |
| QTII 5680 Serie | 26/35 kV | 50–240 mm² | 21.0–45.0 mm | Exterior | gama alta |
| QTIII 7620 Serie | 8.7/15 kV | 35–150 mm² | 16.0–30.0 mm | Indoor/Outdoor | Mid-to-high |
| QTIII 7640 Serie | 18/30 kV | 50–240 mm² | 21.3–45.0 mm | Indoor/Outdoor | gama alta |
| QTIII 7680 Serie | 26/35 kV | 50–500 mm² | 21.0–55.0 mm | Indoor/Outdoor | De primera calidad |
- Directrices de selección & Soluciones de reemplazo
5.1 Parámetros de selección clave
Voltage Level Matching
8.7/15kV system: Choose 5600 / 7620 serie
18/30kV system: Choose 94 / 7640 serie
26/35kV system: Choose 5680 / 7680 serie
Cable Specification Confirmation
Conductor cross-section must fall within model applicable range.
Insulation outer diameter strict matching; tolerance ≤±1mm.
Only for XLPE/EPR cables with copper wire/tape shield.
Installation Environment Selection
Exterior: Select models with rain shed (suffix -4/-2), UV resistant.
Interior: Select non-rain shed type (suffix -3/-1), estructura compacta.
Heavily polluted area: Prioritize QTIII 7690 series with inverted shed design.
5.2 Replacement Recommendation Table
| Modelo Original | Reemplazo directo | Reemplazo de actualización | Cost-Effective Alternative |
| 94-EB63-4 | 7642-T-110 (QTIII) | 7693-S-4-3G (Anti-pollution) | Changyuan CYLS-30/3.1 |
| 5601PST-G-CN | 7620-S-3 (QTIII) | 7620-S-4 (Outdoor Type) | Walen WRS-15/3.1 |
| 5682 | 7680-S-1 (QTIII) | 7690-S-INV (Inverted Shed) | Domestic 35kV Cold Shrink Termination |
5.3 Notas de instalación
- Cable Pre-treatment
Clean cable surface thoroughly with 3M CC-2 cleaning kit.
Smooth transition at shield cutting position to avoid corona discharge.
- Pasos de instalación
QTII series: Install branch sealing & stress mastic first, then termination body.
QTIII series: Diseño integrado, no extra stress mastic needed, simpler installation.
- Safety Regulations
Installers must hold valid medium voltage cable construction qualification.
Ensure cable de-energized and grounded before work.
- Quality Control
Conduct insulation resistance test and partial discharge test after installation.
Record installation date and test data for later maintenance.
- Difference between QTII and QTIII Series
QTIII is 3rd generation technology, grease-free, lower partial discharge (≤5pC), easier installation; price about 20% higher than QTII.
- How to select correct insulation outer diameter range
Measure actual cable main insulation outer diameter, select the smallest model covering the measured size to ensure sufficient radial compression.
- Interchangeability of indoor and outdoor types
Outdoor type can be used indoors; indoor type cannot be used outdoors (no rain shed, insufficient protection).
- Difference for copper core vs aluminum core cable
3M medium voltage cold shrink terminations fit both copper and aluminum conductors without special model selection.
