{"id":1689,"date":"2026-09-21T09:30:11","date_gmt":"2026-09-21T01:30:11","guid":{"rendered":"https:\/\/www.zzanwke.com\/?post_type=cxb_products&p=1689"},"modified":"2026-09-28T17:48:25","modified_gmt":"2026-09-28T09:48:25","slug":"kyn28a-12-armored-removable-medium-voltage-switchgear-feeder-cabinet","status":"publish","type":"cxb_products","link":"https:\/\/www.zzanwke.com\/it\/products\/kyn28a-12-armored-removable-medium-voltage-switchgear-feeder-cabinet\/","title":{"rendered":"KYN28A-12 Armored Removable Medium Voltage Switchgear (Feeder Cabinet)"},"content":{"rendered":"
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

KYN28A-12 Metal-Clad Withdrawable Indoor Switchgear (Feeder Cabinet)<\/h1>\n\n\n\n

1. Product Overview<\/h2>\n\n\n\n

The KYN28A-12 Feeder Cabinet is a core power distribution unit in 12kV indoor medium-voltage systems, designed for outgoing power supply to loads<\/strong>. It is widely used in industrial plants, commercial buildings, mining operations, and power distribution substations to distribute power from the main busbar to transformers, motors, and other downstream equipment.<\/p>\n\n\n\n

This cabinet features a fully metal-clad, four-compartment structure<\/strong> (busbar chamber, circuit breaker trolley chamber, cable chamber, and secondary instrument compartment) with IP4X protection and a complete “Five-Prevention” interlock systemYAXUZG. Equipped with a VS1 vacuum circuit breaker trolley, it integrates power distribution, load control, fault protection, and safe maintenance, making it ideal for global power distribution projectsCHINT Glob….<\/p>\n\n\n\n

2. Main Internal Components<\/h2>\n\n\n\n

Primary Circuit Equipment<\/h3>\n\n\n\n
    \n
  1. VS1 Vacuum Circuit Breaker Trolley<\/strong> The core switching device, installed in the central trolley chamber. It has three positions: working, test, and isolation<\/strong>YAXUZG. The upper contacts connect to the main busbar, and the lower contacts connect to outgoing cables. It provides fast fault interruption for short-circuit and overload conditions\u4eba\u6c11\u7535\u5668\u96c6….<\/li>\n\n\n\n
  2. Current Transformers (CTs)<\/strong> Mounted in the cable chamber, converting high primary current to standard secondary signals (5A\/1A) for protection relays and metering devices\u4eba\u6c11\u7535\u5668\u96c6….<\/li>\n\n\n\n
  3. Earthing Switch<\/strong> Installed in the cable chamber, mechanically interlocked with the breaker trolley. It safely discharges residual voltage during maintenanceYAXUZG.<\/li>\n\n\n\n
  4. Main & Branch Busbars<\/strong> Insulated TMY copper bars forming the power transmission path from the main busbar to the feeder circuit\u4eba\u6c11\u7535\u5668\u96c6….<\/li>\n\n\n\n
  5. High-Voltage Live Display Sensors<\/strong> Detect busbar electrification status and provide visual warnings on the cabinet door\u4eba\u6c11\u7535\u5668\u96c6….<\/li>\n\n\n\n
  6. Lightning Arrester (Optional)<\/strong> Installed in the cable chamber to protect against overvoltage from lightning or switching operationsYAXUZG.<\/li>\n<\/ol>\n\n\n\n

    Secondary Control & Protection Equipment<\/h3>\n\n\n\n
      \n
    1. Microprocessor Protection Relay<\/strong> Implements overcurrent, short-circuit, earth-fault, and overload protection, sending trip signals to the breaker during faultsHONGFA.<\/li>\n\n\n\n
    2. Control Panel<\/strong> Includes operation buttons, status indicators, and fault alarms for local control and monitoring\u4eba\u6c11\u7535\u5668\u96c6….<\/li>\n\n\n\n
    3. Secondary Wiring & Communication Module<\/strong> RS485\/Modbus interface for remote monitoring and data transmission to SCADA systemsHONGFA.<\/li>\n<\/ol>\n\n\n\n

      Safety & Structural Features<\/h3>\n\n\n\n
        \n
      • Arc-Resistant Compartments<\/strong>: Metal partitions contain arc energy during faultsYAXUZG.<\/li>\n\n\n\n
      • Pressure Relief Channel<\/strong>: Top vent releases high-pressure gas to prevent cabinet damageYAXUZG.<\/li>\n\n\n\n
      • Five-Prevention Interlocks<\/strong>: Eliminate misoperations (e.g., live switching, forced entry into live compartments)Changan El….<\/li>\n<\/ul>\n\n\n\n

        3. Working Principle<\/h2>\n\n\n\n

        3.1 Power Distribution<\/h3>\n\n\n\n

        Three-phase 10kV power flows from the main busbar through the breaker trolley to outgoing cables, supplying power to downstream loads.<\/p>\n\n\n\n

        3.2 Breaker Operation<\/h3>\n\n\n\n
          \n
        • Closing<\/strong>: Energizes the closing coil, closing the vacuum interrupter to conduct power\u4eba\u6c11\u7535\u5668\u96c6….<\/li>\n\n\n\n
        • Opening<\/strong>: Manual\/electrical operation or protection relay trip opens the contacts, extinguishing the arc in vacuum\u4eba\u6c11\u7535\u5668\u96c6….<\/li>\n<\/ul>\n\n\n\n

          3.3 Fault Protection<\/h3>\n\n\n\n

          CTs sample load current; the protection relay detects abnormalities and trips the breaker within milliseconds to isolate faultsHONGFA.<\/p>\n\n\n\n

          3.4 Safety Interlocks<\/h3>\n\n\n\n
            \n
          • Breaker can only close when the trolley is in working\/test positionYAXUZG.<\/li>\n\n\n\n
          • Earthing switch closes only when the trolley is isolated and the breaker is openChangan El….<\/li>\n\n\n\n
          • Cabinet doors lock when the busbar is liveYAXUZG.<\/li>\n<\/ul>\n\n\n\n

            4. Core Functions<\/h2>\n\n\n\n
              \n
            1. Load Power Distribution<\/strong>: Supplies power to transformers, motors, and other equipment.<\/li>\n\n\n\n
            2. Comprehensive Fault Protection<\/strong>: Fast interruption of short-circuit, overload, and earth faultsHONGFA.<\/li>\n\n\n\n
            3. Safe Maintenance<\/strong>: Isolation and earthing ensure zero-voltage working conditionsYAXUZG.<\/li>\n\n\n\n
            4. Remote Monitoring<\/strong>: Real-time data transmission for smart grid managementHONGFA.<\/li>\n\n\n\n
            5. Arc Containment<\/strong>: Minimizes fault impact on adjacent equipmentYAXUZG.<\/li>\n<\/ol>\n\n\n\n

              5. Technical Parameters<\/h2>\n\n\n\n

              \u8868\u683c<\/p>\n\n\n\n

              Parameter<\/strong><\/strong><\/td>Specification<\/strong><\/strong><\/td><\/tr><\/thead>
              Rated Voltage<\/td>12kV<\/td><\/tr>
              Rated Frequency<\/td>50\/60Hz (customizable)<\/td><\/tr>
              Rated Current<\/td>630A\u20133150A<\/td><\/tr>
              Short-Circuit Breaking Capacity<\/td>20kA, 25kA, 31.5kA<\/td><\/tr>
              Protection Class<\/td>IP4X<\/td><\/tr>
              Ambient Temperature<\/td>-10\u00b0C to +40\u00b0C<\/td><\/tr>
              Insulation Level<\/td>42kV (1min), 75kV (lightning impulse)<\/td><\/tr>
              Mechanical Life<\/td>\u226520,000 operations<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

              6. Foreign Trade Advantages<\/h2>\n\n\n\n
                \n
              • Compliance<\/strong>: Meets IEC 62271-200, GB\/T 3906 standardsHONGFA.<\/li>\n\n\n\n
              • Modular Design<\/strong>: Easy integration with other KYN28A-12 cabinetsCHINT Glob….<\/li>\n\n\n\n
              • Quick Maintenance<\/strong>: Withdrawable trolley reduces downtimeCHINT Glob….<\/li>\n\n\n\n
              • Global Adaptability<\/strong>: 50\/60Hz compatibility for international projectsCHINT Glob….<\/li>\n\n\n\n
              • Smart Features<\/strong>: Remote monitoring supports unattended operation<\/li>\n<\/ul>\n\n\n\n

                <\/p>","protected":false},"excerpt":{"rendered":"

                KYN28A-12 Metal-Clad Withdrawable Indoor Switchgear (Feeder Cabinet) 1. Product Overview The KYN28A-12 Feeder Cabinet is a core power distribution unit […]<\/p>\n","protected":false},"featured_media":1980,"menu_order":0,"template":"","cxb_product_category":[16],"cxb_product_tag":[],"class_list":["post-1689","cxb_products","type-cxb_products","status-publish","has-post-thumbnail","hentry","cxb_product_category-plasma-equipment"],"_links":{"self":[{"href":"https:\/\/www.zzanwke.com\/it\/wp-json\/wp\/v2\/cxb_products\/1689","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zzanwke.com\/it\/wp-json\/wp\/v2\/cxb_products"}],"about":[{"href":"https:\/\/www.zzanwke.com\/it\/wp-json\/wp\/v2\/types\/cxb_products"}],"version-history":[{"count":2,"href":"https:\/\/www.zzanwke.com\/it\/wp-json\/wp\/v2\/cxb_products\/1689\/revisions"}],"predecessor-version":[{"id":1981,"href":"https:\/\/www.zzanwke.com\/it\/wp-json\/wp\/v2\/cxb_products\/1689\/revisions\/1981"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zzanwke.com\/it\/wp-json\/wp\/v2\/media\/1980"}],"wp:attachment":[{"href":"https:\/\/www.zzanwke.com\/it\/wp-json\/wp\/v2\/media?parent=1689"}],"wp:term":[{"taxonomy":"cxb_product_category","embeddable":true,"href":"https:\/\/www.zzanwke.com\/it\/wp-json\/wp\/v2\/cxb_product_category?post=1689"},{"taxonomy":"cxb_product_tag","embeddable":true,"href":"https:\/\/www.zzanwke.com\/it\/wp-json\/wp\/v2\/cxb_product_tag?post=1689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}