{"id":5861,"date":"2026-02-03T10:37:06","date_gmt":"2026-02-03T02:37:06","guid":{"rendered":"https:\/\/feichuncables.com\/blog\/?p=5861"},"modified":"2026-02-03T10:37:10","modified_gmt":"2026-02-03T02:37:10","slug":"ampcontrol-protection-relays-required-pilot-core-resistance-for-type-450-cables","status":"publish","type":"post","link":"https:\/\/feichuncables.com\/blog\/ampcontrol-protection-relays-required-pilot-core-resistance-for-type-450-cables\/","title":{"rendered":"Ampcontrol Protection Relays: Required Pilot Core Resistance for Type 450 Cables"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ampcontrol\u4fdd\u62a4\u7ee7\u7535\u5668\uff1aType 450\u77ff\u7528\u7535\u7f06\u5bfc\u5f15\u82af\u7535\u963b\u8981\u6c42 \u2014 \u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8\u6280\u672f\u6307\u5357<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-dominant-color=\"a18b7c\" data-has-transparency=\"false\" style=\"--dominant-color: #a18b7c;\" loading=\"lazy\" decoding=\"async\" width=\"979\" height=\"478\" sizes=\"auto, (max-width: 979px) 100vw, 979px\" src=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-709.avif\" alt=\"\" class=\"wp-image-5862 not-transparent\" title=\"\" srcset=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-709.avif 979w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-709-300x146.avif 300w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-709-768x375.avif 768w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-709-400x195.avif 400w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-709-800x391.avif 800w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-709-832x406.avif 832w\" \/><\/figure>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"UTF-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <meta name=\"description\" content=\"Technical guide to Ampcontrol protection relay pilot core resistance requirements for Type 450 mining cables. AS\/NZS standards compliance, earth fault protection, and cable specifications by Anhui Feichun Special Cable Co., Ltd.\">\n    <meta name=\"keywords\" content=\"Ampcontrol relay, Type 450 cable, pilot core resistance, mining cable, earth fault protection, AS\/NZS 1802, AS\/NZS 2081, trailing cable, mining electrical protection\">\n    <meta name=\"author\" content=\"Anhui Feichun Special Cable Co., Ltd. \u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8\">\n    <title>Ampcontrol Protection Relays: Required Pilot Core Resistance for Type 450 Cables | Anhui Feichun Special Cable<\/title>\n    \n    <!-- Preload fonts for minimal layout shift -->\n    <link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n    <link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n    <link href=\"https:\/\/fonts.googleapis.com\/css2?family=Outfit:wght@400;500;600;700&#038;family=IBM+Plex+Mono:wght@400;500&#038;display=swap\" rel=\"stylesheet\">\n    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class=\"article-title\">Ampcontrol Protection Relays: Required Pilot Core Resistance for Type 450 Cables<\/h1>\n                <p class=\"article-subtitle\">Ampcontrol\u4fdd\u62a4\u7ee7\u7535\u5668\uff1aType 450\u77ff\u7528\u7535\u7f06\u5bfc\u5f15\u82af\u7535\u963b\u8981\u6c42 \u2014 \u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8\u6280\u672f\u6307\u5357<\/p>\n                <div class=\"meta-row\">\n                    <span>\ud83d\udcc5 Published: February 2025<\/span>\n                    <span>\ud83d\udcd6 Mining Electrical Protection<\/span>\n                    <span>\u26a1 AS\/NZS Compliance<\/span>\n                <\/div>\n            <\/header>\n\n            <!-- Introduction -->\n            <section class=\"article-section\">\n                <h2 class=\"section-heading\">Introduction to Ampcontrol Protection Systems<\/h2>\n                <p class=\"section-heading-cn\">Ampcontrol\u4fdd\u62a4\u7cfb\u7edf\u6982\u8ff0<\/p>\n                \n                <p>Ampcontrol, headquartered in Newcastle, Australia, is a leading manufacturer of electrical protection equipment for the mining industry. Their protection relays are widely deployed in underground coal mines and surface mining operations throughout Australia, Indonesia, and other mining regions globally. These relays provide critical earth fault protection, earth continuity monitoring, and pilot core supervision essential for mining safety compliance.<\/p>\n                \n                <div class=\"cn-explanation\">\n                    <strong>\u4e2d\u6587\u8bf4\u660e\uff1a<\/strong>Ampcontrol\u603b\u90e8\u4f4d\u4e8e\u6fb3\u5927\u5229\u4e9a\u7ebd\u5361\u65af\u5c14\uff0c\u662f\u77ff\u4e1a\u7535\u6c14\u4fdd\u62a4\u8bbe\u5907\u7684\u9886\u5148\u5236\u9020\u5546\u3002\u5176\u4fdd\u62a4\u7ee7\u7535\u5668\u5e7f\u6cdb\u5e94\u7528\u4e8e\u6fb3\u5927\u5229\u4e9a\u3001\u5370\u5ea6\u5c3c\u897f\u4e9a\u53ca\u5168\u7403\u5176\u4ed6\u77ff\u533a\u7684\u4e95\u4e0b\u7164\u77ff\u548c\u9732\u5929\u91c7\u77ff\u4f5c\u4e1a\u3002\u8fd9\u4e9b\u7ee7\u7535\u5668\u63d0\u4f9b\u5173\u952e\u7684\u63a5\u5730\u6545\u969c\u4fdd\u62a4\u3001\u63a5\u5730\u8fde\u7eed\u6027\u76d1\u6d4b\u548c\u5bfc\u5f15\u82af\u76d1\u63a7\uff0c\u5bf9\u77ff\u5c71\u5b89\u5168\u5408\u89c4\u81f3\u5173\u91cd\u8981\u3002\n                <\/div>\n\n                <p>The correct specification of pilot core resistance is fundamental to ensuring proper operation of Ampcontrol protection relays when used with Type 450 mining cables. This technical guide examines the resistance requirements, calculation methods, and compliance considerations for cable selection in Ampcontrol-protected circuits.<\/p>\n            <\/section>\n\n            <!-- Type 450 Cable Overview -->\n            <section class=\"article-section\">\n                <h2 class=\"section-heading\">Understanding Type 450 Mining Cables<\/h2>\n                <p class=\"section-heading-cn\">Type 450\u77ff\u7528\u7535\u7f06\u6982\u8ff0<\/p>\n\n                <p>Type 450 cables are Australian-standard reeling and trailing cables designed specifically for mining applications. Defined under AS\/NZS 1802 (formerly AS 1802), these cables feature robust construction capable of withstanding the harsh conditions of underground and surface mining environments. The &#8220;Type 450&#8221; designation indicates cables rated for 450\/750V operation in mining applications.<\/p>\n\n                <div class=\"cards-row\">\n                    <div class=\"detail-card\">\n                        <h4>Type 450 Trailing Cables<\/h4>\n                        <p class=\"card-cn\">Type 450\u7275\u5f15\u7535\u7f06<\/p>\n                        <p>Heavy-duty flexible cables designed for mobile mining equipment including continuous miners, shuttle cars, and roof bolters. Features multiple power cores, earth conductors, and pilot\/monitoring cores within a single robust construction.<\/p>\n                    <\/div>\n                    <div class=\"detail-card\">\n                        <h4>Type 450 Reeling Cables<\/h4>\n                        <p class=\"card-cn\">Type 450\u5377\u7b52\u7535\u7f06<\/p>\n                        <p>Cables optimized for cable reel applications on draglines, shovels, and other reeling equipment. Enhanced flexibility and fatigue resistance for continuous reeling operations while maintaining electrical protection integrity.<\/p>\n                    <\/div>\n                    <div class=\"detail-card\">\n                        <h4>Pilot Core Function<\/h4>\n                        <p class=\"card-cn\">\u5bfc\u5f15\u82af\u529f\u80fd<\/p>\n                        <p>Pilot cores in Type 450 cables provide earth continuity monitoring and enable remote tripping of protection devices. The pilot circuit must maintain specific resistance values for proper relay operation and safety system functionality.<\/p>\n                    <\/div>\n                <\/div>\n\n                <div class=\"info-panel\">\n                    <h4>Key Standards for Type 450 Cables | Type 450\u7535\u7f06\u5173\u952e\u6807\u51c6<\/h4>\n                    <ul>\n                        <li><strong>AS\/NZS 1802:<\/strong> Electric cables \u2014 Reeling and trailing \u2014 For mining and general use<\/li>\n                        <li><strong>AS\/NZS 1802\uff1a<\/strong>\u7535\u7f06\u6807\u51c6 \u2014 \u5377\u7b52\u548c\u7275\u5f15\u7535\u7f06 \u2014 \u77ff\u7528\u53ca\u901a\u7528<\/li>\n                        <li><strong>AS\/NZS 2081:<\/strong> Electrical protection devices for mines \u2014 Earth leakage (earth fault) protection<\/li>\n                        <li><strong>AS\/NZS 2081\uff1a<\/strong>\u77ff\u7528\u7535\u6c14\u4fdd\u62a4\u88c5\u7f6e \u2014 \u6f0f\u7535\uff08\u63a5\u5730\u6545\u969c\uff09\u4fdd\u62a4<\/li>\n                        <li><strong>AS\/NZS 4871.1:<\/strong> Electrical equipment for mines and quarries \u2014 General requirements<\/li>\n                        <li><strong>AS\/NZS 4871.1\uff1a<\/strong>\u77ff\u5c71\u548c\u91c7\u77f3\u573a\u7535\u6c14\u8bbe\u5907 \u2014 \u901a\u7528\u8981\u6c42<\/li>\n                    <\/ul>\n                <\/div>\n            <\/section>\n\n            <!-- Pilot Core Resistance Requirements -->\n            <section class=\"article-section\">\n                <h2 class=\"section-heading\">Pilot Core Resistance Requirements<\/h2>\n                <p class=\"section-heading-cn\">\u5bfc\u5f15\u82af\u7535\u963b\u8981\u6c42<\/p>\n\n                <p>Ampcontrol protection relays monitor pilot core resistance to verify earth continuity and cable integrity. The relay measures the total loop resistance of the pilot circuit and compares it against preset thresholds. If resistance exceeds the maximum allowable value, the relay will prevent energization or trip the circuit, ensuring personnel safety.<\/p>\n\n                <div class=\"table-container\">\n                    <table class=\"tech-table\">\n                        <caption>Table 1: Ampcontrol Relay Pilot Core Resistance Limits | \u5bfc\u5f15\u82af\u7535\u963b\u9650\u503c<\/caption>\n                        <thead>\n                            <tr>\n                                <th>Relay Model<\/th>\n                                <th>Function<\/th>\n                                <th>Max Loop Resistance<\/th>\n                                <th>Typical Setting<\/th>\n                                <th>Notes<\/th>\n                            <\/tr>\n                        <\/thead>\n                        <tbody>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">CM2000<\/span>\n                                    <span class=\"param-cn\">CM2000\u7cfb\u5217<\/span>\n                                <\/td>\n                                <td>Earth Continuity Monitor<\/td>\n                                <td><span class=\"val-blue\">50\u03a9<\/span> (standard)<\/td>\n                                <td><span class=\"val-green\">30-40\u03a9<\/span><\/td>\n                                <td>Adjustable 10-50\u03a9 range<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">PF3\/PF4 Series<\/span>\n                                    <span class=\"param-cn\">PF3\/PF4\u7cfb\u5217<\/span>\n                                <\/td>\n                                <td>Pilot &#038; Fault Protection<\/td>\n                                <td><span class=\"val-blue\">45\u03a9<\/span> (default)<\/td>\n                                <td><span class=\"val-green\">25-35\u03a9<\/span><\/td>\n                                <td>Factory default 45\u03a9<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">VIGILANT Series<\/span>\n                                    <span class=\"param-cn\">VIGILANT\u7cfb\u5217<\/span>\n                                <\/td>\n                                <td>Comprehensive Protection<\/td>\n                                <td><span class=\"val-blue\">50\u03a9<\/span> (programmable)<\/td>\n                                <td><span class=\"val-green\">30-45\u03a9<\/span><\/td>\n                                <td>Digital adjustment via HMI<\/td>\n                            <\/tr>\n                            <tr class=\"row-critical\">\n                                <td>\n                                    <span class=\"param-name\">Underground Coal<\/span>\n                                    <span class=\"param-cn\">\u4e95\u4e0b\u7164\u77ff\u5e94\u7528<\/span>\n                                <\/td>\n                                <td>AS\/NZS 2081 Compliance<\/td>\n                                <td><span class=\"val-red\">35\u03a9<\/span> (regulatory)<\/td>\n                                <td><span class=\"val-orange\">25-30\u03a9<\/span><\/td>\n                                <td>Stricter limit for Ex zones<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Surface Mining<\/span>\n                                    <span class=\"param-cn\">\u9732\u5929\u91c7\u77ff\u5e94\u7528<\/span>\n                                <\/td>\n                                <td>General Industrial<\/td>\n                                <td><span class=\"val-blue\">50\u03a9<\/span> (typical)<\/td>\n                                <td><span class=\"val-green\">35-45\u03a9<\/span><\/td>\n                                <td>Less restrictive settings<\/td>\n                            <\/tr>\n                        <\/tbody>\n                    <\/table>\n                <\/div>\n\n                <div class=\"critical-panel\">\n                    <h4>\u26a0\ufe0f Critical: Underground Coal Mine Requirements | \u5173\u952e\u63d0\u793a\uff1a\u4e95\u4e0b\u7164\u77ff\u8981\u6c42<\/h4>\n                    <p>For underground coal mining applications in Australia, AS\/NZS 2081 and relevant state mining regulations typically mandate a maximum pilot loop resistance of <strong>35\u03a9<\/strong>. This is more restrictive than general surface mining settings due to the hazardous (Ex) zone classifications. Always verify requirements with the specific mine site electrical engineer and relevant regulatory authority.<\/p>\n                    <p style=\"margin-top: 0.5rem; color: var(--text-chinese); font-size: 0.85rem;\"><strong>\u4e2d\u6587\uff1a<\/strong>\u5bf9\u4e8e\u6fb3\u5927\u5229\u4e9a\u4e95\u4e0b\u7164\u77ff\u5e94\u7528\uff0cAS\/NZS 2081\u548c\u76f8\u5173\u5dde\u77ff\u4e1a\u6cd5\u89c4\u901a\u5e38\u8981\u6c42\u6700\u5927\u5bfc\u5f15\u56de\u8def\u7535\u963b\u4e3a<strong>35\u03a9<\/strong>\u3002\u7531\u4e8e\u5371\u9669\u533a\u57df\uff08Ex\u533a\uff09\u5206\u7c7b\uff0c\u8fd9\u6bd4\u4e00\u822c\u9732\u5929\u91c7\u77ff\u8bbe\u7f6e\u66f4\u4e3a\u4e25\u683c\u3002\u8bf7\u52a1\u5fc5\u4e0e\u5177\u4f53\u77ff\u5c71\u73b0\u573a\u7535\u6c14\u5de5\u7a0b\u5e08\u548c\u76f8\u5173\u76d1\u7ba1\u673a\u6784\u6838\u5b9e\u8981\u6c42\u3002<\/p>\n                <\/div>\n            <\/section>\n\n            <!-- Pilot Core Resistance Calculation -->\n            <section class=\"article-section\">\n                <h2 class=\"section-heading\">Calculating Pilot Core Resistance<\/h2>\n                <p class=\"section-heading-cn\">\u5bfc\u5f15\u82af\u7535\u963b\u8ba1\u7b97<\/p>\n\n                <p>The total pilot loop resistance comprises the cable pilot core resistance (both directions), connection resistances, and any termination relay coil resistance. Proper calculation ensures the selected cable will meet protection relay requirements for the specific cable run length.<\/p>\n\n                <div class=\"formula-container\">\n                    <h4>Pilot Loop Resistance Formula | \u5bfc\u5f15\u56de\u8def\u7535\u963b\u516c\u5f0f<\/h4>\n                    <div class=\"formula-line\">\n                        R_loop = (2 \u00d7 L \u00d7 r) + R_connections + R_termination\n                    <\/div>\n                    <p class=\"formula-desc\">Where: R_loop = Total loop resistance (\u03a9), L = Cable length (km), r = Conductor resistance (\u03a9\/km), R_connections = Joint\/connector resistance, R_termination = End device resistance<\/p>\n                    <div class=\"formula-line\" style=\"margin-top: 0.75rem;\">\n                        R\u56de\u8def = (2 \u00d7 L \u00d7 r) + R\u8fde\u63a5 + R\u7ec8\u7aef\n                    <\/div>\n                    <p class=\"formula-desc\">\u5176\u4e2d\uff1aR\u56de\u8def=\u603b\u56de\u8def\u7535\u963b(\u03a9)\uff0cL=\u7535\u7f06\u957f\u5ea6(km)\uff0cr=\u5bfc\u4f53\u7535\u963b(\u03a9\/km)\uff0cR\u8fde\u63a5=\u63a5\u5934\/\u8fde\u63a5\u5668\u7535\u963b\uff0cR\u7ec8\u7aef=\u672b\u7aef\u8bbe\u5907\u7535\u963b<\/p>\n                <\/div>\n\n                <div class=\"table-container\">\n                    <table class=\"tech-table\">\n                        <caption>Table 2: Pilot Core Conductor Resistance by Cross-Section (at 20\u00b0C) | \u5bfc\u5f15\u82af\u5bfc\u4f53\u7535\u963b\uff0820\u00b0C\uff09<\/caption>\n                        <thead>\n                            <tr>\n                                <th>Pilot Core Size<\/th>\n                                <th>Resistance (\u03a9\/km)<\/th>\n                                <th>Max Length @ 35\u03a9*<\/th>\n                                <th>Max Length @ 50\u03a9*<\/th>\n                                <th>Typical Application<\/th>\n                            <\/tr>\n                        <\/thead>\n                        <tbody>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">1.5 mm\u00b2<\/span>\n                                    <span class=\"param-cn\">1.5\u5e73\u65b9\u6beb\u7c73<\/span>\n                                <\/td>\n                                <td><span class=\"val-blue\">12.1 \u03a9\/km<\/span><\/td>\n                                <td><span class=\"val-orange\">~1.2 km<\/span><\/td>\n                                <td><span class=\"val-green\">~1.9 km<\/span><\/td>\n                                <td>Short trailing cables<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">2.5 mm\u00b2<\/span>\n                                    <span class=\"param-cn\">2.5\u5e73\u65b9\u6beb\u7c73<\/span>\n                                <\/td>\n                                <td><span class=\"val-blue\">7.41 \u03a9\/km<\/span><\/td>\n                                <td><span class=\"val-green\">~2.1 km<\/span><\/td>\n                                <td><span class=\"val-green\">~3.1 km<\/span><\/td>\n                                <td>Standard trailing cables<\/td>\n                            <\/tr>\n                            <tr class=\"row-critical\">\n                                <td>\n                                    <span class=\"param-name\">4.0 mm\u00b2<\/span>\n                                    <span class=\"param-cn\">4.0\u5e73\u65b9\u6beb\u7c73<\/span>\n                                <\/td>\n                                <td><span class=\"val-blue\">4.61 \u03a9\/km<\/span><\/td>\n                                <td><span class=\"val-green\">~3.4 km<\/span><\/td>\n                                <td><span class=\"val-green\">~5.0 km<\/span><\/td>\n                                <td>Long run applications<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">6.0 mm\u00b2<\/span>\n                                    <span class=\"param-cn\">6.0\u5e73\u65b9\u6beb\u7c73<\/span>\n                                <\/td>\n                                <td><span class=\"val-blue\">3.08 \u03a9\/km<\/span><\/td>\n                                <td><span class=\"val-green\">~5.2 km<\/span><\/td>\n                                <td><span class=\"val-green\">~7.6 km<\/span><\/td>\n                                <td>Extended dragline cables<\/td>\n                            <\/tr>\n                        <\/tbody>\n                    <\/table>\n                <\/div>\n\n                <p style=\"font-size: 0.85rem; color: var(--text-muted);\">*Maximum lengths calculated assuming 5\u03a9 allowance for connections and terminations. Actual limits depend on specific installation conditions. Values based on Class 5 flexible copper conductors per IEC 60228.<\/p>\n\n                <div class=\"cn-explanation\">\n                    <strong>\u8ba1\u7b97\u8bf4\u660e\uff1a<\/strong>\u4e0a\u8868\u6700\u5927\u957f\u5ea6\u57fa\u4e8e5\u03a9\u7684\u8fde\u63a5\u548c\u7ec8\u7aef\u7535\u963b\u4f59\u91cf\u8ba1\u7b97\u3002\u5b9e\u9645\u9650\u503c\u53d6\u51b3\u4e8e\u5177\u4f53\u5b89\u88c5\u6761\u4ef6\u3002\u6570\u503c\u57fa\u4e8eIEC 60228\u6807\u51c6\u76845\u7c7b\u8f6f\u94dc\u5bfc\u4f53\u3002\u5efa\u8bae\u5728\u8bbe\u8ba1\u9636\u6bb5\u7559\u51fa10-15%\u7684\u5b89\u5168\u88d5\u5ea6\u3002\n                <\/div>\n            <\/section>\n\n            <!-- Temperature Effects -->\n            <section class=\"article-section\">\n                <h2 class=\"section-heading\">Temperature Effects on Pilot Core Resistance<\/h2>\n                <p class=\"section-heading-cn\">\u6e29\u5ea6\u5bf9\u5bfc\u5f15\u82af\u7535\u963b\u7684\u5f71\u54cd<\/p>\n\n                <p>Copper conductor resistance increases with temperature, which is a critical consideration for mining cables operating in hot underground environments or exposed to solar heating on the surface. The pilot core resistance measured at ambient temperature will increase during operation, potentially approaching or exceeding relay trip thresholds.<\/p>\n\n                <div class=\"formula-container\">\n                    <h4>Temperature Correction Formula | \u6e29\u5ea6\u4fee\u6b63\u516c\u5f0f<\/h4>\n                    <div class=\"formula-line\">\n                        R_t = R_20 \u00d7 [1 + \u03b1 \u00d7 (T &#8211; 20)]\n                    <\/div>\n                    <p class=\"formula-desc\">Where: R_t = Resistance at temperature T, R_20 = Resistance at 20\u00b0C, \u03b1 = Temperature coefficient (0.00393\/\u00b0C for copper), T = Operating temperature (\u00b0C)<\/p>\n                <\/div>\n\n                <div class=\"table-container\">\n                    <table class=\"tech-table\">\n                        <caption>Table 3: Pilot Core Resistance Temperature Correction Factors | \u6e29\u5ea6\u4fee\u6b63\u7cfb\u6570<\/caption>\n                        <thead>\n                            <tr>\n                                <th>Operating Temperature<\/th>\n                                <th>Correction Factor<\/th>\n                                <th>Resistance Increase<\/th>\n                                <th>Application Example<\/th>\n                            <\/tr>\n                        <\/thead>\n                        <tbody>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">20\u00b0C (Reference)<\/span>\n                                    <span class=\"param-cn\">20\u00b0C\uff08\u53c2\u8003\u6e29\u5ea6\uff09<\/span>\n                                <\/td>\n                                <td><span class=\"val-blue\">1.000<\/span><\/td>\n                                <td>0%<\/td>\n                                <td>Standard test condition<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">30\u00b0C<\/span>\n                                    <span class=\"param-cn\">30\u00b0C<\/span>\n                                <\/td>\n                                <td><span class=\"val-blue\">1.039<\/span><\/td>\n                                <td>+3.9%<\/td>\n                                <td>Typical surface operation<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">40\u00b0C<\/span>\n                                    <span class=\"param-cn\">40\u00b0C<\/span>\n                                <\/td>\n                                <td><span class=\"val-orange\">1.079<\/span><\/td>\n                                <td>+7.9%<\/td>\n                                <td>Hot surface, shallow UG<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">50\u00b0C<\/span>\n                                    <span class=\"param-cn\">50\u00b0C<\/span>\n                                <\/td>\n                                <td><span class=\"val-orange\">1.118<\/span><\/td>\n                                <td>+11.8%<\/td>\n                                <td>Deep underground mines<\/td>\n                            <\/tr>\n                            <tr class=\"row-critical\">\n                                <td>\n                                    <span class=\"param-name\">60\u00b0C<\/span>\n                                    <span class=\"param-cn\">60\u00b0C<\/span>\n                                <\/td>\n                                <td><span class=\"val-red\">1.157<\/span><\/td>\n                                <td>+15.7%<\/td>\n                                <td>Maximum continuous rating<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">70\u00b0C<\/span>\n                                    <span class=\"param-cn\">70\u00b0C<\/span>\n                                <\/td>\n                                <td><span class=\"val-red\">1.196<\/span><\/td>\n                                <td>+19.6%<\/td>\n                                <td>Short-term overload<\/td>\n                            <\/tr>\n                        <\/tbody>\n                    <\/table>\n                <\/div>\n\n                <div class=\"warning-panel\">\n                    <h4>\u26a0\ufe0f Design Recommendation | \u8bbe\u8ba1\u5efa\u8bae<\/h4>\n                    <p>When designing pilot circuits for Type 450 cables with Ampcontrol relays, calculate the maximum expected resistance at the highest anticipated operating temperature. A safety margin of at least 15-20% below the relay trip threshold is recommended to account for temperature variations, connector aging, and measurement tolerances.<\/p>\n                    <p style=\"margin-top: 0.5rem; color: var(--text-chinese); font-size: 0.85rem;\"><strong>\u4e2d\u6587\uff1a<\/strong>\u5728\u4e3a\u914d\u5408Ampcontrol\u7ee7\u7535\u5668\u4f7f\u7528\u7684Type 450\u7535\u7f06\u8bbe\u8ba1\u5bfc\u5f15\u56de\u8def\u65f6\uff0c\u5e94\u6309\u6700\u9ad8\u9884\u671f\u5de5\u4f5c\u6e29\u5ea6\u8ba1\u7b97\u6700\u5927\u9884\u671f\u7535\u963b\u3002\u5efa\u8bae\u5728\u7ee7\u7535\u5668\u8df3\u95f8\u9608\u503c\u4ee5\u4e0b\u7559\u51fa\u81f3\u5c1115-20%\u7684\u5b89\u5168\u88d5\u5ea6\uff0c\u4ee5\u5e94\u5bf9\u6e29\u5ea6\u53d8\u5316\u3001\u8fde\u63a5\u5668\u8001\u5316\u548c\u6d4b\u91cf\u5bb9\u5dee\u3002<\/p>\n                <\/div>\n            <\/section>\n\n            <!-- Cable Selection Guide -->\n            <section class=\"article-section\">\n                <h2 class=\"section-heading\">Type 450 Cable Selection Guide<\/h2>\n                <p class=\"section-heading-cn\">Type 450\u7535\u7f06\u9009\u578b\u6307\u5357<\/p>\n\n                <div class=\"table-container\">\n                    <table class=\"tech-table\">\n                        <caption>Table 4: Recommended Pilot Core Sizes for Common Applications | \u5e38\u89c1\u5e94\u7528\u63a8\u8350\u5bfc\u5f15\u82af\u89c4\u683c<\/caption>\n                        <thead>\n                            <tr>\n                                <th>Application<\/th>\n                                <th>Typical Length<\/th>\n                                <th>Min Pilot Core<\/th>\n                                <th>Recommended<\/th>\n                                <th>Relay Setting<\/th>\n                            <\/tr>\n                        <\/thead>\n                        <tbody>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Continuous Miner<\/span>\n                                    <span class=\"param-cn\">\u8fde\u7eed\u91c7\u7164\u673a<\/span>\n                                <\/td>\n                                <td>200-400m<\/td>\n                                <td>1.5 mm\u00b2<\/td>\n                                <td><span class=\"val-green\">2.5 mm\u00b2<\/span><\/td>\n                                <td>35\u03a9 (UG coal)<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Shuttle Car<\/span>\n                                    <span class=\"param-cn\">\u7a7f\u68ad\u77ff\u8f66<\/span>\n                                <\/td>\n                                <td>150-300m<\/td>\n                                <td>1.5 mm\u00b2<\/td>\n                                <td><span class=\"val-green\">2.5 mm\u00b2<\/span><\/td>\n                                <td>35\u03a9 (UG coal)<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Roof Bolter<\/span>\n                                    <span class=\"param-cn\">\u9876\u677f\u951a\u6746\u673a<\/span>\n                                <\/td>\n                                <td>100-250m<\/td>\n                                <td>1.5 mm\u00b2<\/td>\n                                <td><span class=\"val-green\">2.5 mm\u00b2<\/span><\/td>\n                                <td>35\u03a9 (UG coal)<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Longwall Equipment<\/span>\n                                    <span class=\"param-cn\">\u957f\u58c1\u7efc\u91c7\u8bbe\u5907<\/span>\n                                <\/td>\n                                <td>300-600m<\/td>\n                                <td>2.5 mm\u00b2<\/td>\n                                <td><span class=\"val-green\">4.0 mm\u00b2<\/span><\/td>\n                                <td>35\u03a9 (UG coal)<\/td>\n                            <\/tr>\n                            <tr class=\"row-critical\">\n                                <td>\n                                    <span class=\"param-name\">Dragline<\/span>\n                                    <span class=\"param-cn\">\u62d6\u6597\u6316\u6398\u673a<\/span>\n                                <\/td>\n                                <td>500-2000m<\/td>\n                                <td>4.0 mm\u00b2<\/td>\n                                <td><span class=\"val-blue\">6.0 mm\u00b2<\/span><\/td>\n                                <td>50\u03a9 (surface)<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Electric Shovel<\/span>\n                                    <span class=\"param-cn\">\u7535\u94f2<\/span>\n                                <\/td>\n                                <td>300-800m<\/td>\n                                <td>2.5 mm\u00b2<\/td>\n                                <td><span class=\"val-green\">4.0 mm\u00b2<\/span><\/td>\n                                <td>50\u03a9 (surface)<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Haul Truck (Cable Reel)<\/span>\n                                    <span class=\"param-cn\">\u77ff\u7528\u81ea\u5378\u8f66\uff08\u5377\u7f06\uff09<\/span>\n                                <\/td>\n                                <td>200-500m<\/td>\n                                <td>2.5 mm\u00b2<\/td>\n                                <td><span class=\"val-green\">4.0 mm\u00b2<\/span><\/td>\n                                <td>50\u03a9 (surface)<\/td>\n                            <\/tr>\n                        <\/tbody>\n                    <\/table>\n                <\/div>\n            <\/section>\n\n            <!-- Feichun Compatible Cables -->\n            <section class=\"article-section\">\n                <h2 class=\"section-heading\">Feichun Type 450 Compatible Cables<\/h2>\n                <p class=\"section-heading-cn\">\u98de\u7eafType 450\u517c\u5bb9\u7535\u7f06<\/p>\n\n                <p>Anhui Feichun Special Cable Co., Ltd. manufactures mining cables compatible with Australian Type 450 specifications and suitable for use with Ampcontrol protection systems. Our cables are designed to meet the pilot core resistance requirements of Ampcontrol relays while providing the mechanical durability required for harsh mining environments.<\/p>\n\n                <div class=\"table-container\">\n                    <table class=\"tech-table\">\n                        <caption>Table 5: Feichun Mining Cable Specifications | \u98de\u7eaf\u77ff\u7528\u7535\u7f06\u89c4\u683c<\/caption>\n                        <thead>\n                            <tr>\n                                <th>Model<\/th>\n                                <th>Voltage Rating<\/th>\n                                <th>Pilot Core Options<\/th>\n                                <th>Standards Compliance<\/th>\n                                <th>Features<\/th>\n                            <\/tr>\n                        <\/thead>\n                        <tbody>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">FC-REELING-450<\/span>\n                                    <span class=\"param-cn\">\u5377\u7b52\u578b\u77ff\u7f06<\/span>\n                                <\/td>\n                                <td>450\/750V, 1.9\/3.3kV<\/td>\n                                <td>2.5, 4.0, 6.0 mm\u00b2<\/td>\n                                <td>AS\/NZS 1802 equivalent<\/td>\n                                <td>High flex, EMI shielding<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">FC-TRAILING-450<\/span>\n                                    <span class=\"param-cn\">\u7275\u5f15\u578b\u77ff\u7f06<\/span>\n                                <\/td>\n                                <td>450\/750V, 1.9\/3.3kV<\/td>\n                                <td>1.5, 2.5, 4.0 mm\u00b2<\/td>\n                                <td>AS\/NZS 1802 equivalent<\/td>\n                                <td>Abrasion resistant, oil resistant<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">FC-SHOVEL-HV<\/span>\n                                    <span class=\"param-cn\">\u7535\u94f2\u9ad8\u538b\u7535\u7f06<\/span>\n                                <\/td>\n                                <td>3.3\/6.6kV, 6.35\/11kV<\/td>\n                                <td>4.0, 6.0 mm\u00b2<\/td>\n                                <td>AS\/NZS 1802 \/ IEC 60502<\/td>\n                                <td>EPR insulation, XLPE option<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">FC-DRAGLINE-EHV<\/span>\n                                    <span class=\"param-cn\">\u62d6\u6597\u8d85\u9ad8\u538b\u7535\u7f06<\/span>\n                                <\/td>\n                                <td>11\/22kV, 19\/33kV<\/td>\n                                <td>6.0 mm\u00b2 (standard)<\/td>\n                                <td>AS\/NZS 1429 \/ IEC 60502<\/td>\n                                <td>Long length capability<\/td>\n                            <\/tr>\n                        <\/tbody>\n                    <\/table>\n                <\/div>\n\n                <div class=\"info-panel\">\n                    <h4>Feichun Quality Assurance | \u98de\u7eaf\u8d28\u91cf\u4fdd\u8bc1<\/h4>\n                    <ul>\n                        <li><strong>100% Pilot Core Testing:<\/strong> Every cable drum undergoes pilot core resistance measurement before shipment.<\/li>\n                        <li><strong>100%\u5bfc\u5f15\u82af\u6d4b\u8bd5\uff1a<\/strong>\u6bcf\u5377\u7535\u7f06\u5728\u53d1\u8d27\u524d\u5747\u8fdb\u884c\u5bfc\u5f15\u82af\u7535\u963b\u6d4b\u91cf\u3002<\/li>\n                        <li><strong>Temperature-Compensated Values:<\/strong> Resistance values normalized to 20\u00b0C with correction factors provided.<\/li>\n                        <li><strong>\u6e29\u5ea6\u8865\u507f\u6570\u503c\uff1a<\/strong>\u7535\u963b\u503c\u5f52\u4e00\u5316\u81f320\u00b0C\uff0c\u5e76\u63d0\u4f9b\u4fee\u6b63\u7cfb\u6570\u3002<\/li>\n                        <li><strong>Certification Documentation:<\/strong> Full test certificates provided including pilot core resistance measurements.<\/li>\n                        <li><strong>\u8ba4\u8bc1\u6587\u4ef6\uff1a<\/strong>\u63d0\u4f9b\u5b8c\u6574\u6d4b\u8bd5\u8bc1\u4e66\uff0c\u5305\u62ec\u5bfc\u5f15\u82af\u7535\u963b\u6d4b\u91cf\u7ed3\u679c\u3002<\/li>\n                    <\/ul>\n                <\/div>\n            <\/section>\n\n            <!-- Installation Considerations -->\n            <section class=\"article-section\">\n                <h2 class=\"section-heading\">Installation and Testing Considerations<\/h2>\n                <p class=\"section-heading-cn\">\u5b89\u88c5\u548c\u6d4b\u8bd5\u6ce8\u610f\u4e8b\u9879<\/p>\n\n                <div class=\"table-container\">\n                    <table class=\"tech-table\">\n                        <caption>Table 6: Pilot Circuit Installation Checklist | \u5bfc\u5f15\u56de\u8def\u5b89\u88c5\u68c0\u67e5\u6e05\u5355<\/caption>\n                        <thead>\n                            <tr>\n                                <th>Item<\/th>\n                                <th>Requirement<\/th>\n                                <th>Verification Method<\/th>\n                            <\/tr>\n                        <\/thead>\n                        <tbody>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Connection Quality<\/span>\n                                    <span class=\"param-cn\">\u8fde\u63a5\u8d28\u91cf<\/span>\n                                <\/td>\n                                <td>Low resistance joints, properly crimped\/bolted<\/td>\n                                <td>Milliohm meter measurement (&lt;0.5\u03a9 per joint)<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Coupler Integrity<\/span>\n                                    <span class=\"param-cn\">\u8fde\u63a5\u5668\u5b8c\u6574\u6027<\/span>\n                                <\/td>\n                                <td>Mining-rated couplers, IP68 minimum<\/td>\n                                <td>Visual inspection, continuity test<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Loop Resistance<\/span>\n                                    <span class=\"param-cn\">\u56de\u8def\u7535\u963b<\/span>\n                                <\/td>\n                                <td>Below relay threshold with temperature margin<\/td>\n                                <td>Low resistance ohmmeter at both ends<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Insulation Resistance<\/span>\n                                    <span class=\"param-cn\">\u7edd\u7f18\u7535\u963b<\/span>\n                                <\/td>\n                                <td>&gt;1M\u03a9 pilot-to-earth, &gt;1M\u03a9 pilot-to-power<\/td>\n                                <td>500V\/1000V insulation tester<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Relay Compatibility<\/span>\n                                    <span class=\"param-cn\">\u7ee7\u7535\u5668\u517c\u5bb9\u6027<\/span>\n                                <\/td>\n                                <td>Confirm relay model and setting range<\/td>\n                                <td>Review relay datasheet, verify settings<\/td>\n                            <\/tr>\n                            <tr>\n                                <td>\n                                    <span class=\"param-name\">Functional Test<\/span>\n                                    <span class=\"param-cn\">\u529f\u80fd\u6d4b\u8bd5<\/span>\n                                <\/td>\n                                <td>Verify relay trips on pilot open circuit<\/td>\n                                <td>Controlled disconnection test<\/td>\n                            <\/tr>\n                        <\/tbody>\n                    <\/table>\n                <\/div>\n\n                <div class=\"cn-explanation\">\n                    <strong>\u5b89\u88c5\u63d0\u793a\uff1a<\/strong>\u5728\u5b89\u88c5Type 450\u7535\u7f06\u7528\u4e8eAmpcontrol\u4fdd\u62a4\u7cfb\u7edf\u4e4b\u524d\uff0c\u5e94\u6d4b\u91cf\u6574\u4e2a\u5bfc\u5f15\u56de\u8def\u7535\u963b\u5e76\u8bb0\u5f55\u3002\u6b64\u57fa\u51c6\u6d4b\u91cf\u53ef\u7528\u4e8e\u672a\u6765\u6545\u969c\u6392\u9664\u548c\u9884\u9632\u6027\u7ef4\u62a4\u6bd4\u8f83\u3002\u5efa\u8bae\u6bcf6\u4e2a\u6708\u91cd\u65b0\u6d4b\u91cf\u4e00\u6b21\u56de\u8def\u7535\u963b\uff0c\u4ee5\u76d1\u6d4b\u8fde\u63a5\u5668\u8001\u5316\u548c\u7535\u7f06\u52a3\u5316\u60c5\u51b5\u3002\n                <\/div>\n            <\/section>\n\n            <!-- Conclusion -->\n            <section class=\"article-section\">\n                <h2 class=\"section-heading\">Conclusion<\/h2>\n                <p class=\"section-heading-cn\">\u7ed3\u8bba<\/p>\n\n                <p>Proper specification of pilot core resistance is essential for reliable operation of Ampcontrol protection relays with Type 450 mining cables. The selection of appropriate pilot core cross-section must account for cable length, operating temperature, connection resistances, and the specific relay model&#8217;s trip threshold. For underground coal mining applications, the more restrictive 35\u03a9 limit requires careful calculation and typically necessitates larger pilot cores for extended cable runs.<\/p>\n\n                <p>Anhui Feichun Special Cable Co., Ltd. provides Type 450 compatible mining cables with precisely specified pilot core resistances suitable for Ampcontrol protection systems. Our technical team can assist with pilot circuit calculations and cable selection to ensure compliance with Australian mining electrical safety standards. Contact us for detailed specifications, resistance calculations, and quotations for your specific application requirements.<\/p>\n\n                <div class=\"cn-explanation\">\n                    <strong>\u7ed3\u8bba\uff1a<\/strong>\u6b63\u786e\u89c4\u5b9a\u5bfc\u5f15\u82af\u7535\u963b\u5bf9\u4e8eAmpcontrol\u4fdd\u62a4\u7ee7\u7535\u5668\u4e0eType 450\u77ff\u7528\u7535\u7f06\u7684\u53ef\u9760\u8fd0\u884c\u81f3\u5173\u91cd\u8981\u3002\u9009\u62e9\u5408\u9002\u7684\u5bfc\u5f15\u82af\u622a\u9762\u5fc5\u987b\u8003\u8651\u7535\u7f06\u957f\u5ea6\u3001\u5de5\u4f5c\u6e29\u5ea6\u3001\u8fde\u63a5\u7535\u963b\u4ee5\u53ca\u5177\u4f53\u7ee7\u7535\u5668\u578b\u53f7\u7684\u8df3\u95f8\u9608\u503c\u3002\u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8\u63d0\u4f9b\u7b26\u5408Type 450\u89c4\u683c\u7684\u77ff\u7528\u7535\u7f06\uff0c\u5176\u5bfc\u5f15\u82af\u7535\u963b\u7cbe\u786e\u7b26\u5408Ampcontrol\u4fdd\u62a4\u7cfb\u7edf\u8981\u6c42\u3002\u6211\u4eec\u7684\u6280\u672f\u56e2\u961f\u53ef\u534f\u52a9\u8fdb\u884c\u5bfc\u5f15\u56de\u8def\u8ba1\u7b97\u548c\u7535\u7f06\u9009\u578b\uff0c\u786e\u4fdd\u7b26\u5408\u6fb3\u5927\u5229\u4e9a\u77ff\u5c71\u7535\u6c14\u5b89\u5168\u6807\u51c6\u3002\u6b22\u8fce\u8054\u7cfb\u6211\u4eec\u83b7\u53d6\u8be6\u7ec6\u89c4\u683c\u3001\u7535\u963b\u8ba1\u7b97\u548c\u62a5\u4ef7\u3002\n                <\/div>\n            <\/section>\n\n            <!-- References -->\n            <section class=\"references-section\">\n                <h3>References and Sources | \u53c2\u8003\u6587\u732e\u4e0e\u6765\u6e90<\/h3>\n                <ol class=\"ref-list\">\n                    <li>Ampcontrol Group. &#8220;CM2000 Earth Continuity Monitor Technical Manual.&#8221;\n                        <a href=\"https:\/\/www.ampcontrolgroup.com\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.ampcontrolgroup.com<\/a><\/li>\n                    <li>Ampcontrol Group. &#8220;VIGILANT Protection Relay Series Product Catalogue.&#8221;\n                        <a href=\"https:\/\/www.ampcontrolgroup.com\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.ampcontrolgroup.com<\/a><\/li>\n                    <li>Standards Australia. &#8220;AS\/NZS 1802:2003 Electric cables \u2014 Reeling and trailing \u2014 For mining and general use.&#8221;\n                        <a href=\"https:\/\/www.standards.org.au\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.standards.org.au<\/a><\/li>\n                    <li>Standards Australia. &#8220;AS\/NZS 2081:2011 Electrical protection devices for mines \u2014 Earth leakage (earth fault) protection.&#8221;\n                        <a href=\"https:\/\/www.standards.org.au\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.standards.org.au<\/a><\/li>\n                    <li>Standards Australia. &#8220;AS\/NZS 4871.1:2012 Electrical equipment for mines and quarries \u2014 General requirements.&#8221;\n                        <a href=\"https:\/\/www.standards.org.au\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.standards.org.au<\/a><\/li>\n                    <li>IEC 60228:2004. &#8220;Conductors of insulated cables.&#8221; International Electrotechnical Commission.\n                        <a href=\"https:\/\/www.iec.ch\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.iec.ch<\/a><\/li>\n                    <li>Resources Safety &#038; Health Queensland. &#8220;Recognised Standard 14: Testing and maintenance of electrical equipment in mines.&#8221;\n                        <a href=\"https:\/\/www.rshq.qld.gov.au\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.rshq.qld.gov.au<\/a><\/li>\n                    <li>NSW Resources Regulator. &#8220;MDG 1: Guideline for the management of electricity in mines.&#8221;\n                        <a href=\"https:\/\/www.resourcesregulator.nsw.gov.au\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.resourcesregulator.nsw.gov.au<\/a><\/li>\n                    <li>Coal Services Pty Ltd. &#8220;Electrical Engineering Technical Information.&#8221;\n                        <a href=\"https:\/\/www.coalservices.com.au\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.coalservices.com.au<\/a><\/li>\n                    <li>Prysmian Group. &#8220;Mining Cables Technical Handbook.&#8221;\n                        <a href=\"https:\/\/www.prysmiangroup.com\" rel=\"nofollow noopener\" target=\"_blank\" class=\"ext-link\">www.prysmiangroup.com<\/a><\/li>\n                <\/ol>\n            <\/section>\n\n            <!-- Contact Section -->\n            <section class=\"contact-section\">\n                <h3>Contact Anhui Feichun Special Cable Co., Ltd.<\/h3>\n                <p class=\"cn-sub\">\u8054\u7cfb\u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8 \u2014 Professional Mining Cable Solutions<\/p>\n                \n                <div class=\"contact-grid\">\n                    <div class=\"contact-item\">\n                        <span class=\"contact-label\">WhatsApp<\/span>\n                        <span class=\"contact-value\">\n                            <a href=\"https:\/\/wa.me\/8613855123218\" rel=\"nofollow noopener\" target=\"_blank\">+86 138 5512 3218<\/a>\n                        <\/span>\n                    <\/div>\n                    <div class=\"contact-item\">\n                        <span class=\"contact-label\">Technical Support<\/span>\n                        <span class=\"contact-value\">\n                            <a href=\"mailto:tech@feichuncables.com\" rel=\"nofollow\">tech@feichuncables.com<\/a>\n                        <\/span>\n                    <\/div>\n                    <div class=\"contact-item\">\n                        <span class=\"contact-label\">Sales &#8211; Mr. Yang Zihao<\/span>\n                        <span class=\"contact-value\">\n                            <a href=\"mailto:zihao.yang@feichuncables.com\" rel=\"nofollow\">zihao.yang@feichuncables.com<\/a>\n                        <\/span>\n                    <\/div>\n                    <div class=\"contact-item\">\n                        <span class=\"contact-label\">Sales &#8211; Mr. Huang Ziyu<\/span>\n                        <span class=\"contact-value\">\n                            <a href=\"mailto:ziyu.huang@feichuncables.com\" rel=\"nofollow\">ziyu.huang@feichuncables.com<\/a>\n                        <\/span>\n                    <\/div>\n                <\/div>\n            <\/section>\n\n            <!-- Footer -->\n            <footer class=\"page-footer\">\n                <p>\u00a9 2025 Anhui Feichun Special Cable Co., Ltd. \u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8<\/p>\n                <p>All technical specifications subject to change. Contact us for current data and project-specific recommendations.<\/p>\n            <\/footer>\n        <\/article>\n    <\/main>\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"Type 450 cables are Australian-standard reeling and trailing cables designed specifically for mining applications. Defined under AS\/NZS 1802 (formerly AS 1802), these cables feature robust construction capable of withstanding the harsh conditions of underground and surface mining environments. The &#8220;Type 450&#8221; designation indicates cables rated for 450\/750V operation in mining applications.","protected":false},"author":1,"featured_media":5862,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_singular_sidebar":"left","csco_page_header_type":"title","csco_page_load_nextpost":"","footnotes":""},"categories":[222,66,7],"tags":[14268,38817,38822,38814,38810,38805,38806,38815,38808,37450,38807,31735,35109,37473,3705,4488,1043,38826,1237,8257,6985,28491,1114,38821,38825,1079,38823,38818,4225,38812,38809,35159,1958,22082,171,1112,152,107,411,1132,28484,38811,111,4246,2029,11577,139,36863,38824,2940,38108,214,2077,204,38813,38820,37452,38816,35417,38819,17,36331,1090,35158,1232,3788,1908,2063,33003,994,38401,3772,4302,28489,2060],"class_list":["post-5861","post","type-post","status-publish","format-standard","has-post-thumbnail","category-as-nzs-1802-reeling-cables-for-underground-mining","category-common-problems-encountered-in-cable-applications","category-mining-trailing-cable","tag-1-9-3-3kv-mining-cable","tag-2-5mm2-pilot-core","tag-4-0mm2-pilot-core","tag-450-750v-mining-cable","tag-6-0mm2-pilot-core","tag-ampcontrol","tag-ampcontrol-cm2000","tag-ampcontrol-compatible-cable","tag-ampcontrol-protection-relay","tag-ampcontrol-relay","tag-ampcontrol-vigilant","tag-as-nzs-1802","tag-as-nzs-2081","tag-as-nzs-4871","tag-australian-mining-cable","tag-australian-mining-standard","tag-class-5-conductor","tag-coal-mining-australia","tag-coal-mining-cable","tag-coal-mining-equipment","tag-conductor-resistance","tag-continuous-miner","tag-continuous-miner-cable","tag-copper-conductor-resistance","tag-dragline","tag-dragline-cable","tag-earth-continuity","tag-earth-continuity-monitor","tag-earth-fault-protection","tag-earth-loop-impedance","tag-earth-monitoring","tag-electric-shovel","tag-electric-shovel-cable","tag-ex-zone-cable","tag-explosion-proof-mining-cable","tag-hazardous-area-cable","tag-heavy-duty-mining-cable","tag-heavy-duty-e-loader-mining-cable","tag-iec-60228","tag-longwall-cable","tag-longwall-shearer","tag-loop-resistance-calculation","tag-mining-cable","tag-mining-cable-manufacturer-china","tag-mining-cable-supplier","tag-mining-cable-supplier-china","tag-mining-cables","tag-mining-electrical-protection","tag-mining-electrical-standard","tag-mining-equipment-cable","tag-mining-excavator","tag-mining-power-cable","tag-mining-safety-cable","tag-mining-trailing-cable","tag-nsw-mining","tag-pilot-circuit-resistance","tag-pilot-core-resistance","tag-pilot-core-specification","tag-pilot-wire","tag-queensland-mining","tag-reeling-cable","tag-roof-bolter","tag-roof-bolter-cable","tag-shuttle-car","tag-shuttle-car-cable","tag-surface-mining","tag-surface-mining-cable","tag-surface-mining-equipment","tag-temperature-correction-factor","tag-trailing-cable","tag-trailing-cable-system","tag-type-450-cable","tag-type-450-mining-cable","tag-underground-coal-mining","tag-underground-mining-equipment","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/5861","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/comments?post=5861"}],"version-history":[{"count":1,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/5861\/revisions"}],"predecessor-version":[{"id":5863,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/5861\/revisions\/5863"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/5862"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=5861"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=5861"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/tags?post=5861"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}