如何修复Type 241电缆损坏的护套以保持其阻燃性能？

Type 241 Cable Sheath Repair Procedure to Maintain Flame Retardant Properties | Anhui Feichun Special Cable

What Is the Procedure for Repairing a Damaged Sheath on a Type 241 Cable to Maintain Its Flame Retardant Properties?

如何修复Type 241电缆损坏的护套以保持其阻燃性能？

Technical Engineering Guide by Anhui Feichun Special Cable Co., Ltd. (安徽飞纯特种电缆有限公司)

1. Introduction 简介

Type 241 mining cables are critical power supply components in underground coal mining operations, where the outer sheath serves as both the primary mechanical protection barrier and a vital fire safety element. The heavy-duty polychloroprene (HD-85-PCP) sheath provides flame retardancy that prevents fire propagation in the methane-rich atmospheres characteristic of coal mines. When this sheath becomes damaged through mechanical abrasion, cutting, crushing, or chemical attack, the integrity of the flame retardant protection is compromised, potentially creating an ignition source or allowing fire to spread along the cable in the event of an electrical fault.

中文说明：Type 241采矿电缆是井下煤矿作业中关键的电源供应组件，其外护套既是主要的机械保护屏障，也是重要的消防安全元素。重型聚氯丁橡胶（HD-85-PCP）护套提供阻燃性能，防止火焰在煤矿特有的富含甲烷气氛中蔓延。当护套因机械磨损、切割、挤压或化学侵蚀而损坏时，阻燃保护的完整性会受到影响，可能在发生电气故障时产生点火源或允许火焰沿电缆蔓延。

Repairing a damaged sheath while maintaining its flame retardant properties requires strict adherence to procedures specified in AS/NZS 1747:2022 and the use of materials that match the original sheath compound’s fire performance characteristics. This guide provides comprehensive procedures for assessing damage, selecting appropriate repair methods, and verifying that the repaired cable maintains its required flame retardancy rating per IEC 60332 and AS/NZS 1802.

中文说明：在保持阻燃性能的同时修复损坏的护套，需要严格遵守AS/NZS 1747:2022中规定的程序，并使用与原护套化合物火灾性能特性相匹配的材料。本指南提供全面的程序，用于评估损坏、选择适当的修复方法，并验证修复后的电缆保持其符合IEC 60332和AS/NZS 1802要求的阻燃等级。

Reference: Standards New Zealand AS/NZS 1747:2022

2. Type 241 Cable Construction Type 241电缆结构

2.1 Cable Overview 电缆概述

Type 241 is a flexible rubber-screened mining cable engineered specifically for underground coal mining applications. It features a semiconductive elastomer screen that provides protective earth contact for any object breaching the sheath prior to contact with power conductors, significantly enhancing personnel safety. The cable is designed for use as main feeder cable for continuous miners, pump cable, and general power supply in demanding underground environments.

中文说明：Type 241是一种专为井下煤矿应用设计的柔性橡胶屏蔽采矿电缆。它具有半导体弹性体屏蔽层，可为任何穿透护套的物体提供保护性接地接触，在接触电源导体之前大大增强人员安全。该电缆设计用于连续采煤机的主馈电电缆、泵电缆和恶劣井下环境中的一般电源供应。

Reference: Eland Cables Type 241 Mining Cable Technical Data

2.2 Construction Specifications 结构规格

Type 241 Cable Construction Details Type 241电缆结构详情
Component 组件	Material 材料	Standard 标准
Conductors 导体	Flexible stranded tinned annealed copper 柔性绞合镀锡退火铜	AS/NZS 1125
Conductor Screen (3.3kV+) 导体屏蔽	Semiconductive tape + extruded compound 半导体带+挤出化合物	AS/NZS 1802
Power Core Insulation 电源芯绝缘	EPR (Ethylene Propylene Rubber) R-EP-90 乙丙橡胶	AS/NZS 3808
Insulation Screen 绝缘屏蔽	Semiconductive elastomer tape 半导体弹性体带	AS/NZS 1802
Cradle Separator 托架分隔层	Semiconductive PCP 半导体聚氯丁橡胶	AS/NZS 1802
Overall Core Screen 整体芯线屏蔽	Semiconductive PCP filling and covering 半导体PCP填充和覆盖层	AS/NZS 1802
Earth Conductors (×3) 接地导体	Semiconductive PCP insulated tinned copper 半导体PCP绝缘镀锡铜	AS/NZS 1802
Central Pilot Core 中心引导芯	EPR covered tinned copper (extensible) EPR覆盖镀锡铜（可延展）	AS/NZS 1802
Textile Reinforcement 纺织增强层	Open-weave polyamide braid 开放编织聚酰胺编织层	AS/NZS 1802
Outer Sheath 外护套	HD-85-PCP (Heavy Duty Polychloroprene) 重型聚氯丁橡胶	AS/NZS 3808

Reference: Caledonian Cables Type 241 Technical Specifications

2.3 Voltage Ratings 电压等级

Type 241 Voltage Variants Type 241电压型号
Type 型号	Rated Voltage 额定电压	Test Voltage 测试电压	Application 应用
Type 241.1	1.1/1.1 kV	4.2 kV	Continuous miners, pumps 连续采煤机、泵
Type 241.3	3.3/3.3 kV	12 kV	Longwall supply, feeder cables 长壁供电、馈电电缆
Type 241.6	6.6/6.6 kV	22 kV	High-power equipment 大功率设备
Type 241.11	11/11 kV	30 kV	Primary distribution 一次配电

Reference: Üntel AS/NZS 1802 Type 241 Cable Data

3. HD-85-PCP Sheath Properties HD-85-PCP护套性能

3.1 Material Characteristics 材料特性

The outer sheath of Type 241 cable is manufactured from HD-85-PCP, a heavy-duty cross-linked compound based on polychloroprene (also known commercially as Neoprene). This material was selected specifically for underground coal mining applications due to its combination of mechanical toughness, chemical resistance, and inherent flame retardancy. Polychloroprene releases chlorine gas when burned, which acts as a flame suppressant by interfering with the combustion reaction chain.

中文说明：Type 241电缆的外护套由HD-85-PCP制成，这是一种基于聚氯丁橡胶（商业上也称为氯丁橡胶）的重型交联化合物。由于其机械韧性、耐化学性和固有阻燃性的结合，该材料专门为井下煤矿应用而选择。聚氯丁橡胶燃烧时释放氯气，通过干扰燃烧反应链起到阻燃作用。

Reference: Tratos Group – Polychloroprene (PCP) Technical Information

HD-85-PCP Sheath Material Properties HD-85-PCP护套材料性能
Property 性能	Specification 规格	Significance 意义
Maximum Operating Temperature 最高工作温度	85°C continuous 持续	Suitable for high-load mining applications 适用于高负载采矿应用
Minimum Operating Temperature 最低工作温度	-25°C	Maintains flexibility in cold conditions 在寒冷条件下保持柔性
Flame Retardancy 阻燃性	Self-extinguishing 自熄	Prevents flame propagation 防止火焰蔓延
Oil Resistance 耐油性	Very good 非常好	Resists hydraulic fluids, lubricants 耐液压油、润滑剂
Abrasion Resistance 耐磨性	Heavy duty 重型	Withstands trailing over rough surfaces 耐粗糙表面拖曳
Weather Resistance 耐候性	Excellent 优异	UV and ozone resistant 耐紫外线和臭氧
Chemical Resistance 耐化学性	Good to acids, alkalis 耐酸碱性好	Resists mine water and chemicals 耐矿井水和化学品
Tensile Strength 抗拉强度	≥10 MPa (per AS/NZS 3808)	Mechanical durability 机械耐久性
Elongation at Break 断裂伸长率	≥300%	Flexibility under stress 承受应力时的柔性

Reference: Eland Cables – Benefits of PCP Sheathed Cables

3.2 Flame Retardant Testing Requirements 阻燃测试要求

Type 241 cables must pass vertical flame propagation tests per IEC 60332-1-2 for single cables. In this test, a 600mm cable sample is mounted vertically and a 1kW pre-mixed flame is applied for 60 seconds (or 120 seconds for cables with overall diameter exceeding 25mm). The cable passes if it self-extinguishes after flame removal and the charred or affected portion does not extend to within 50mm of the upper cable support. Any repair materials used must maintain this flame performance characteristic.

中文说明：Type 241电缆必须通过符合IEC 60332-1-2标准的单根电缆垂直火焰蔓延测试。在此测试中，将600mm电缆样品垂直安装，施加1kW预混火焰60秒（对于总直径超过25mm的电缆为120秒）。如果电缆在火焰移除后自熄，且烧焦或受影响部分未延伸到上部电缆支架50mm以内，则电缆通过测试。所使用的任何修复材料都必须保持这种火焰性能特性。

Reference: IEC 60332-1-2:2004 Tests on Electric Cables Under Fire Conditions

4. Damage Assessment 损坏评估

4.1 Types of Sheath Damage 护套损坏类型

Classification of Type 241 Sheath Damage Type 241护套损坏分类
Damage Type 损坏类型	Description 描述	Typical Cause 典型原因	Repairability 可修复性
Surface Abrasion 表面磨损	Material loss without penetration to reinforcement 材料损失但未穿透至增强层	Trailing over rough surfaces 在粗糙表面上拖曳	Repairable if <30% sheath thickness affected 如果影响<30%护套厚度则可修复
Cut/Slice 切割/切口	Clean incision through sheath 护套的干净切口	Sharp objects, machinery contact 尖锐物体、机械接触	Repairable if no conductor damage 如果导体无损坏则可修复
Crush Damage 挤压损坏	Deformation with internal damage 伴有内部损坏的变形	Run-over by equipment, pinch points 被设备碾压、夹点	Requires internal inspection 需要内部检查
Chemical Attack 化学侵蚀	Softening, swelling, or degradation 软化、膨胀或降解	Incompatible solvents, fuels 不兼容的溶剂、燃料	May require section replacement 可能需要更换部分
Heat Damage 热损坏	Charring, melting, or embrittlement 碳化、熔化或脆化	Overload, external heat source 过载、外部热源	Often requires replacement 通常需要更换
Moisture Ingress 水分侵入	Water penetration through sheath breach 水通过护套破口渗透	Unsealed damage, immersion 未密封的损坏、浸泡	Requires drying and sealing 需要干燥和密封

4.2 Damage Assessment Procedure 损坏评估程序

Pre-Repair Damage Assessment Steps 修复前损坏评估步骤
Step 步骤	Action 操作	Acceptance Criteria 接受标准
1	Isolate cable and verify de-energised state 隔离电缆并验证断电状态	Zero voltage confirmed 确认零电压
2	Clean area around damage for inspection 清洁损坏周围区域以进行检查	Visible inspection possible 可进行目视检查
3	Measure damage dimensions (length, width, depth) 测量损坏尺寸（长度、宽度、深度）	Document all measurements 记录所有测量结果
4	Determine if reinforcement braid is exposed 确定增强编织层是否暴露	Assess repair complexity 评估修复复杂性
5	Check for conductor or insulation damage 检查导体或绝缘损坏	No conductor exposure for sheath-only repair 仅护套修复时无导体暴露
6	Perform insulation resistance test (500V Megger) 进行绝缘电阻测试（500V兆欧表）	≥1 MΩ per AS/NZS 1747 按AS/NZS 1747要求≥1 MΩ
7	Check for moisture ingress 检查水分侵入	Dry cable interior required 需要干燥的电缆内部
8	Determine repair method based on damage extent 根据损坏程度确定修复方法	Per AS/NZS 1747 guidelines 按AS/NZS 1747指南

Reference: AS/NZS 1747:2003 Cable Repair Standard Overview

4.3 Repair vs. Replacement Decision Criteria 修复与更换决策标准

Repair or Replace Decision Matrix 修复或更换决策矩阵
Condition 条件	Decision 决定	Rationale 理由
Sheath damage <150mm length, no internal damage 护套损坏<150mm长度，无内部损坏	Repair 修复	Minor repair restores integrity 小修复可恢复完整性
Multiple repairs within 1m section 1m段内有多处修复	Section replacement 部分更换	Excessive repairs compromise reliability 过多修复会损害可靠性
Conductor insulation damaged 导体绝缘损坏	Full splice or replacement 完整接头或更换	Requires conductor reconnection 需要导体重新连接
Heat damage with carbonisation 带碳化的热损坏	Section replacement 部分更换	Internal damage likely 可能存在内部损坏
Chemical degradation >500mm 化学降解>500mm	Section replacement 部分更换	Material properties compromised 材料性能受损
Repair count >3 per 100m 每100m修复次数>3	Consider full replacement 考虑全部更换	Economic and safety assessment required 需要经济和安全评估

5. Approved Repair Methods 批准的修复方法

5.1 Overview of Repair Methods 修复方法概述

AS/NZS 1747:2022 specifies two primary methods for repairing the outer sheath of Type 241 cables while maintaining flame retardant properties: vulcanized (hot) repair and cold repair using approved compounds. The vulcanizing method produces a repair that is chemically bonded to the original sheath material and matches its mechanical and fire performance properties most closely. Cold repair methods using flame retardant casting resins or self-vulcanizing tapes provide acceptable results for less critical applications or field emergency repairs.

中文说明：AS/NZS 1747:2022规定了两种主要方法来修复Type 241电缆的外护套，同时保持阻燃性能：硫化（热）修复和使用批准化合物的冷修复。硫化方法产生的修复与原护套材料化学键合，最接近地匹配其机械和火灾性能特性。使用阻燃浇铸树脂或自硫化带的冷修复方法为较不关键的应用或现场紧急修复提供可接受的结果。

Comparison of Sheath Repair Methods 护套修复方法比较
Method 方法	Bond Type 粘结类型	Flame Retardancy 阻燃性	Application 应用	Equipment 设备
Vulcanizing (Hot Cure) 硫化（热固化）	Chemical cross-link bond 化学交联键合	Matches original sheath 与原护套匹配	Permanent shop repair 永久车间修复	Vulcanizer, molds, PCP compound 硫化机、模具、PCP化合物
Resin Casting (Cold Cure) 树脂浇铸（冷固化）	Adhesive/mechanical bond 粘接/机械键合	Per compound rating 按化合物等级	Field or shop repair 现场或车间修复	Mold kit, FR resin (e.g., 3M 2131) 模具套件、阻燃树脂
Self-Vulcanizing Tape 自硫化带	Self-amalgamating bond 自融合键合	Per tape specification 按带规格	Emergency field repair 紧急现场修复	FR tape, adhesive, heat shrink 阻燃带、粘合剂、热缩管

Reference: Mine Cable Services – Vulcanizing Cable Repair Equipment

5.2 Approved Repair Materials 批准的修复材料

Flame Retardant Sheath Repair Materials 阻燃护套修复材料
Material Type 材料类型	Product Examples 产品示例	Approval/Standard 批准/标准	Application 应用
Vulcanizable Neoprene Compound 可硫化氯丁化合物	OMS Neoprene Jacket Compound OMS氯丁护套化合物	30 CFR 18.64, MSHA P-153	Hot vulcanizing PCP sheath repair 热硫化PCP护套修复
Vulcanizable Hypalon Compound 可硫化海帕龙化合物	OMS Hypalon Jacket Compound OMS海帕龙护套化合物	30 CFR 18.64, MSHA P-153	CSP/Hypalon sheath repair CSP/海帕龙护套修复
Flame Retardant Casting Resin 阻燃浇铸树脂	3M Scotchcast 2131	MSHA Approved, 30 CFR 7.404	Cold repair, mold casting 冷修复、模具浇铸
FR Jacketing Tape 阻燃护套带	OMS GLF2 Laminate Tape	30 CFR 7.404, MSHA P-7K-SK-153082	Jacket repair, abrasion protection 护套修复、耐磨保护
Self-Amalgamating Rubber Tape 自融合橡胶带	3M Scotch 130C	UL Listed, FR rated	Moisture sealing, insulation build-up 防潮密封、绝缘堆积
EPR Insulation Compound EPR绝缘化合物	OMS EPR Insulation Compound	30 CFR 18.64	Restoring conductor insulation 恢复导体绝缘

Reference: OMS Products – Mining Cable Splice Kits and Vulcanizing Materials

Reference: 3M Scotchcast M-Series Cable Repair Kits

6. Vulcanizing Repair Procedure 硫化修复程序

6.1 Equipment Required 所需设备

Vulcanizing Repair Equipment List 硫化修复设备清单
Equipment 设备	Specification 规格	Purpose 目的
Cable Vulcanizer 电缆硫化机	Temperature range 127°C–166°C (260°F–330°F)	Heat and pressure application 施加热量和压力
Aluminum Molds 铝制模具	Matched to cable diameter 与电缆直径匹配	Shape repair to cable profile 将修复塑造成电缆轮廓
Neoprene Repair Compound 氯丁修复化合物	MSHA approved, FR rated MSHA批准、阻燃等级	Sheath restoration 护套恢复
Surface Preparation Tools 表面准备工具	Abrasive cloth, solvent cleaner 砂布、溶剂清洁剂	Bond surface preparation 粘结表面准备
Temperature Controller 温度控制器	PLC with temperature feedback 带温度反馈的PLC	Cure cycle control 固化周期控制
Release Agent 脱模剂	Silicone-based 硅基	Prevent compound adhesion to mold 防止化合物粘附到模具

6.2 Step-by-Step Vulcanizing Procedure 分步硫化程序

Vulcanized Sheath Repair Procedure 硫化护套修复程序
Step 步骤	Action 操作	Critical Parameters 关键参数
1. Isolation 隔离	De-energise cable, apply lockout/tagout 断开电缆电源，应用锁定/标签	Verify zero voltage before proceeding 继续前验证零电压
2. Damage Preparation 损坏准备	Cut away damaged sheath material to sound material 将损坏的护套材料切除至完好材料处	Bevel edges at 45° for bonding 以45°斜切边缘以便粘结
3. Surface Cleaning 表面清洁	Clean repair area with approved solvent (naphtha) 用批准的溶剂（石脑油）清洁修复区域	Remove all oil, grease, dirt 去除所有油脂、污垢
4. Surface Roughening 表面粗糙化	Abrade original sheath surface with 80-grit cloth 用80目砂布打磨原护套表面	Create mechanical key for bond 创建机械键合表面
5. Compound Application 化合物施加	Fill damage area with neoprene compound, slightly overfill 用氯丁化合物填充损坏区域，略微过量填充	No air pockets, complete coverage 无气泡、完全覆盖
6. Mold Installation 模具安装	Position mold halves around repair, apply release agent 将模具两半放置在修复处周围，涂抹脱模剂	Proper alignment, no pinch points 正确对齐、无夹点
7. Vulcanizer Setup 硫化机设置	Place cable with mold in vulcanizer, close press 将带模具的电缆放入硫化机，关闭压力机	Apply specified pressure 施加规定压力
8. Cure Cycle 固化周期	Heat to cure temperature, maintain for specified time 加热至固化温度，保持规定时间	Typically 149°C (300°F) for 20–30 min 通常149°C（300°F）持续20–30分钟
9. Cool Down 冷却	Allow gradual cooling before mold removal 在模具拆除前允许逐渐冷却	Prevent thermal shock, cracking 防止热冲击、开裂
10. Finishing 精加工	Remove flash, smooth surface to match cable profile 去除飞边，平滑表面以匹配电缆轮廓	Maintain consistent diameter 保持一致直径

Reference: ABL Services – Vulcanized Power Cable Repair

6.3 Vulcanizing Parameters for HD-85-PCP HD-85-PCP硫化参数

Vulcanizing Cure Parameters 硫化固化参数
Parameter 参数	Typical Value 典型值	Notes 说明
Cure Temperature 固化温度	149–166°C (300–330°F)	Per compound manufacturer specification 按化合物制造商规格
Cure Time 固化时间	20–45 minutes	Depends on repair thickness 取决于修复厚度
Mold Pressure 模具压力	350–700 kPa (50–100 psi)	Ensures compound flow and bonding 确保化合物流动和粘结
Preheat Time 预热时间	5–10 minutes	Allow uniform heat distribution 允许均匀热量分布
Cool-down 冷却	To <60°C before mold removal 模具拆除前降至<60°C	Prevents surface defects 防止表面缺陷

7. Cold Repair Method 冷修复方法

7.1 Resin Casting Repair (3M Scotchcast Method) 树脂浇铸修复（3M Scotchcast方法）

Cold repair using flame retardant casting resin provides an effective alternative when vulcanizing equipment is unavailable or for field emergency repairs. The 3M Scotchcast M-Series Cable Repair Kit with Compound 2131 is MSHA approved (when used according to instructions) and provides permanent, moisture-resistant jacket repairs while maintaining flame retardant properties. The wraparound mold allows repair without cutting through the cable.

中文说明：当硫化设备不可用或用于现场紧急修复时，使用阻燃浇铸树脂进行冷修复提供了有效的替代方案。带2131化合物的3M Scotchcast M系列电缆修复套件经MSHA批准（按说明使用时），可提供永久、防潮的护套修复，同时保持阻燃性能。环绕式模具允许在不切断电缆的情况下进行修复。

Reference: 3M Cable Jacket Repair Solutions

Cold Repair Procedure Using Resin Casting 使用树脂浇铸的冷修复程序
Step 步骤	Action 操作	Notes 说明
1	De-energise cable, apply lockout/tagout 断开电缆电源，应用锁定/标签	Safety first 安全第一
2	Clean repair area with solvent (naphtha or isopropyl alcohol) 用溶剂清洁修复区域	Remove all contamination 去除所有污染物
3	Abrade sheath surface with 80-grit abrasive cloth 用80目砂布打磨护套表面	Extend 25mm beyond damage edges 延伸至损坏边缘25mm以外
4	Apply primer/adhesive if specified by kit instructions 如套件说明规定，涂抹底漆/粘合剂	Some resins require primer 某些树脂需要底漆
5	Position wraparound mold around cable, seal ends 将环绕式模具放置在电缆周围，密封两端	Centre damage in mold cavity 将损坏置于模具腔体中心
6	Mix flame retardant resin per manufacturer instructions 按制造商说明混合阻燃树脂	Observe pot life limitations 注意适用期限制
7	Pour or inject resin into mold cavity 将树脂倒入或注入模具腔体	Fill from low point, avoid air entrapment 从低点填充，避免空气滞留
8	Allow full cure time before handling 在处理前允许完全固化时间	Typically 30–60 minutes at 20°C 通常在20°C下30–60分钟
9	Remove mold, inspect repair for voids or defects 拆除模具，检查修复处是否有空隙或缺陷	Recast if defects found 如发现缺陷则重新浇铸
10	Perform electrical tests per AS/NZS 1747 按AS/NZS 1747进行电气测试	Insulation resistance, voltage withstand 绝缘电阻、耐压

7.2 Self-Vulcanizing Tape Repair (Emergency Method) 自硫化带修复（紧急方法）

Self-Vulcanizing Tape Emergency Repair Procedure 自硫化带紧急修复程序
Step 步骤	Action 操作	Notes 说明
1	Isolate and clean cable as above 如上所述隔离和清洁电缆	Thorough cleaning essential 彻底清洁至关重要
2	Apply rubber/neoprene adhesive to cable surface 在电缆表面涂抹橡胶/氯丁粘合剂	Extend 50mm beyond damage 延伸至损坏50mm以外
3	Allow adhesive to become tacky 让粘合剂变粘	Typically 5–10 minutes 通常5–10分钟
4	Apply self-vulcanizing rubber tape (e.g., 3M Scotch 130C) 应用自硫化橡胶带	Half-overlap, stretch to half-width while wrapping 半重叠，缠绕时拉伸至半宽
5	Build up to original sheath thickness + 10% 堆积至原护套厚度+10%	Minimum 3 layers 最少3层
6	Apply FR jacketing tape over self-vulcanizing tape 在自硫化带上涂抹阻燃护套带	Provides abrasion resistance and FR properties 提供耐磨性和阻燃性能
7	Apply adhesive-lined heat shrink tubing over repair 在修复处覆盖粘合剂衬里热缩管	Optional, for additional protection 可选，用于额外保护
8	Mark repair location with permanent marker 用永久记号笔标记修复位置	Required for inspection records 检查记录所需

Note: Self-vulcanizing tape repairs should be considered temporary emergency repairs and replaced with vulcanized repairs at the earliest opportunity.

注意：自硫化带修复应被视为临时紧急修复，应在最早机会用硫化修复替换。

8. Maintaining Flame Retardant Properties 保持阻燃性能

8.1 Critical Requirements for FR Integrity FR完整性的关键要求

The flame retardant properties of the repaired sheath depend on using materials that match or exceed the fire performance of the original HD-85-PCP compound. The repair material must pass the same IEC 60332-1-2 vertical flame test that the original cable was qualified to. All repair materials used in underground coal mines must be MSHA approved under 30 CFR Part 7 or 30 CFR 18.64 to ensure they meet flame resistance requirements.

中文说明：修复护套的阻燃性能取决于使用与原HD-85-PCP化合物火灾性能相匹配或超过的材料。修复材料必须通过与原电缆相同的IEC 60332-1-2垂直火焰测试。井下煤矿中使用的所有修复材料必须获得30 CFR Part 7或30 CFR 18.64下的MSHA批准，以确保符合阻燃要求。

Requirements for Maintaining Flame Retardancy 保持阻燃性的要求
Requirement 要求	Specification 规格	Verification 验证
Repair Material Certification 修复材料认证	MSHA approved or equivalent rating MSHA批准或同等等级	Check product approval number 检查产品批准号
Material Compatibility 材料兼容性	Compatible with PCP/Neoprene base material 与PCP/氯丁基材兼容	Manufacturer specification 制造商规格
Minimum Thickness 最小厚度	Equal to or greater than original sheath 等于或大于原护套	Measure after repair 修复后测量
Complete Coverage 完全覆盖	No gaps, voids, or thin spots 无间隙、空隙或薄点	Visual and tactile inspection 目视和触觉检查
Bond Integrity 粘结完整性	No delamination or separation 无分层或分离	Flex test, visual inspection 弯曲测试、目视检查
Surface Finish 表面光洁度	Smooth, no sharp edges or cracks 光滑、无锐边或裂纹	Visual inspection 目视检查

8.2 Materials That Compromise FR Properties 会损害阻燃性能的材料

Materials NOT Suitable for Type 241 FR Sheath Repair 不适合Type 241阻燃护套修复的材料
Material 材料	Reason for Unsuitability 不适用原因
Standard PVC electrical tape 标准PVC电工胶带	Not flame retardant rated for mining, does not bond chemically 非采矿用阻燃等级，不能化学键合
Non-FR rubber compounds 非阻燃橡胶化合物	Will propagate flame, not MSHA approved 会传播火焰，非MSHA批准
Silicone sealants 硅酮密封胶	Poor adhesion to PCP, may not be FR rated 与PCP粘附性差，可能非阻燃等级
Polyurethane potting compounds 聚氨酯灌封化合物	May not match FR rating, incompatible chemistry 可能不匹配阻燃等级，化学性质不兼容
Generic heat shrink tubing 通用热缩管	Must be specifically FR rated for mining use 必须专门用于采矿的阻燃等级

Reference: MSHA Application Procedure for Electric Cable Approval

9. Post-Repair Testing 修复后测试

9.1 Electrical Tests per AS/NZS 1747 根据AS/NZS 1747的电气测试

Required Post-Repair Electrical Tests 所需的修复后电气测试
Test 测试	Method 方法	Acceptance Criteria 接受标准
Insulation Resistance 绝缘电阻	500V DC megger, 1 minute 500V直流兆欧表，1分钟	≥1 MΩ (minimum) 最小≥1 MΩ
Conductor Continuity 导体连续性	Low resistance ohmmeter 低阻欧姆表	Per original cable specification 按原电缆规格
Earth Continuity 接地连续性	Earth loop impedance test 接地回路阻抗测试	Per AS/NZS 1747 requirements 按AS/NZS 1747要求
High Voltage Withstand 高压耐受	DC test voltage per cable rating 按电缆额定值的直流测试电压	No breakdown, no excessive leakage 无击穿、无过度泄漏
Sheath Integrity 护套完整性	10kV DC spark test over repair 在修复处进行10kV直流火花测试	No breakdown 无击穿

9.2 DC Test Voltages by Cable Rating 按电缆额定值的直流测试电压

High Voltage Test Values for Type 241 Type 241高压测试值
Cable Type 电缆型号	Rated Voltage 额定电压	Routine DC Test 常规直流测试	After Repair Test 修复后测试
Type 241.1	1.1/1.1 kV	4.2 kV DC	3.5 kV DC (1 minute)
Type 241.3	3.3/3.3 kV	12 kV DC	10 kV DC (1 minute)
Type 241.6	6.6/6.6 kV	22 kV DC	18 kV DC (1 minute)
Type 241.11	11/11 kV	30 kV DC	25 kV DC (1 minute)

9.3 Visual and Mechanical Inspection 目视和机械检查

Post-Repair Inspection Checklist 修复后检查清单
Inspection Item 检查项目	Acceptance Criteria 接受标准
Repair profile 修复轮廓	Smooth transition to original sheath, no sharp edges 与原护套平滑过渡，无锐边
Diameter consistency 直径一致性	Within ±5% of original cable diameter 在原电缆直径±5%以内
Surface finish 表面光洁度	No cracks, voids, porosity, or delamination 无裂纹、空隙、孔隙或分层
Bond integrity 粘结完整性	No separation at bond line when flexed 弯曲时粘结线处无分离
Flexibility 柔性	Repair area flexes without cracking 修复区域弯曲无裂纹
Colour match 颜色匹配	Repair visible for inspection purposes 修复可见用于检查目的
Identification marking 标识标记	Repair location marked with date and technician ID 修复位置标有日期和技术员ID

9.4 Documentation Requirements 文档要求

Per AS/NZS 1747:2022, all cable repairs must be documented and records maintained for the life of the cable. Documentation must include the cable identification, damage description, repair method used, materials used (with batch/lot numbers), technician identification, test results, and date of repair. This documentation forms part of the mine’s electrical safety management system.

中文说明：根据AS/NZS 1747:2022，所有电缆修复必须记录文档，并在电缆使用寿命期间保存记录。文档必须包括电缆标识、损坏描述、使用的修复方法、使用的材料（带批次号）、技术员标识、测试结果和修复日期。该文档构成矿山电气安全管理系统的一部分。

Reference: Queensland Resources Safety – Recognised Standard 01

10. Applicable Standards 适用标准

Standards Governing Type 241 Cable Repair 管理Type 241电缆修复的标准
Standard 标准	Title 标题	Relevance 相关性
AS/NZS 1747:2022	Reeling, trailing and feeder cables used for mining – Repair, testing and fitting of accessories 采矿用卷缆、拖缆和馈电电缆–修理、测试和配件安装	Primary standard for cable repair procedures 电缆修复程序的主要标准
AS/NZS 1802:2018	Electric cables – Reeling and trailing – For underground coal mining 电缆–卷缆和拖缆–用于井下煤矿	Cable construction and material requirements 电缆结构和材料要求
AS/NZS 3808	Polymeric materials for cables 电缆用聚合物材料	Sheath compound specifications 护套化合物规格
IEC 60332-1-2	Tests on electric cables under fire conditions – Vertical flame propagation 火灾条件下电缆测试–垂直火焰蔓延	Flame retardancy test requirements 阻燃测试要求
30 CFR Part 7	Testing by applicant or third party (MSHA) 申请人或第三方测试（MSHA）	US mining cable approval requirements 美国采矿电缆批准要求
30 CFR 18.64	Flame-resistant requirements for trailing cables 拖缆阻燃要求	MSHA flame resistance standards MSHA阻燃标准
AS/NZS 1125	Conductors in insulated electric cables 绝缘电缆中的导体	Conductor specifications 导体规格

Reference: Feichun Cables – AS Standard Cable Type Differences

11. Anhui Feichun Cable Solutions 安徽飞纯电缆解决方案

Anhui Feichun Special Cable Co., Ltd. (安徽飞纯特种电缆有限公司) manufactures Type 241 and related mining cables to AS/NZS 1802:2018 standards with high-quality HD-85-PCP sheaths engineered for reliable flame retardancy and long service life. Our cables are designed with repairability in mind, featuring consistent sheath compounds that bond well with approved repair materials. We also provide technical support for cable repair procedures and can recommend approved repair materials compatible with our cable constructions.

中文说明：安徽飞纯特种电缆有限公司按AS/NZS 1802:2018标准生产Type 241和相关采矿电缆，配备高质量HD-85-PCP护套，专为可靠的阻燃性和长使用寿命而设计。我们的电缆在设计时考虑了可修复性，具有与批准的修复材料良好粘结的一致护套化合物。我们还为电缆修复程序提供技术支持，并可推荐与我们电缆结构兼容的批准修复材料。

11.1 Feichun Type 241 Product Range 飞纯Type 241产品系列

Feichun Type 241 Cable Offerings 飞纯Type 241电缆产品
Product 产品	Voltage 电压	Conductor Range 导体范围	Features 特点
Type 241.1	1.1/1.1 kV	6–120 mm²	Standard trailing cable 标准拖缆
Type 241.3	3.3/3.3 kV	16–185 mm²	Medium voltage feeder 中压馈电电缆
Type 241.6	6.6/6.6 kV	25–240 mm²	High-power applications 大功率应用
Type 241.11	11/11 kV	35–300 mm²	Primary distribution 一次配电
Type 241 Superflex	1.1–6.6 kV	6–95 mm²	Enhanced flexibility 增强柔性

12. Contact Anhui Feichun Special Cable Co., Ltd. 联系安徽飞纯特种电缆有限公司

For technical consultation on Type 241 cable repair procedures, compatible repair materials, cable selection, or custom cable requirements, please contact our engineering team:

中文说明：如需Type 241电缆修复程序、兼容修复材料、电缆选择或定制电缆需求的技术咨询，请联系我们的工程团队：

Contact Information 联系信息
Contact Method 联系方式	Details 详情
Technical Support Email 技术支持邮箱	[email protected]
Sales Contact 销售联系	[email protected]
Sales Contact 销售联系	[email protected]
WhatsApp	+86 138 5512 3218
Location 地址	Building A Private Science and Technology Park, Hefei Economic and Technological Development Zone, Anhui Province, China 中国安徽省合肥经济技术开发区私营科技园A座

13. External References 外部参考资料

Feichun-Type-241-ASNZS-1802-Mining-Cable.pdf 下载