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ZW7-33kV Outdoor Medium Voltage Vacuum Circuit Breaker – Factory Direct, Complete Certifications, Exportable
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Our ZW7-33kV Outdoor Medium Voltage Vacuum Circuit Breaker is a high-reliability switching and protection device specially developed for 33kV, 50Hz three-phase AC outdoor power systems. As a classic model of outdoor vacuum circuit breakers, it adopts advanced vacuum arc-extinguishing technology, featuring no gas leakage, no environmental pollution, and ultra-fast arc extinction. Equipped with a high-strength spring operating mechanism, the ZW7-33kV has stable action, high mechanical accuracy, and strong anti-jamming performance. The enclosure is made of high-quality 304 stainless steel, treated with anti-corrosion and anti-pollution coating, with IP67 protection grade, which can adapt to harsh outdoor environments such as high altitude, heavy pollution, coastal salt spray, and extreme temperature. Compliant with IEC 62271-100 and GB 1984 standards, the ZW7-33kV is widely used in 33kV outdoor substations, power transmission lines, industrial and mining enterprises, and new energy projects, providing safe, stable and efficient protection for 33kV power grid operation.
1. Product Overview 产品概述
ZW7-33kV Outdoor Medium Voltage Vacuum Circuit Breaker is a core equipment in 33kV medium voltage power distribution networks, mainly used to close, carry and break normal load current, and quickly cut off short-circuit current and overload current when the power system fails, so as to avoid fault expansion and protect the safe operation of power grid equipment. The product integrates vacuum interrupter, spring operating mechanism, silicone rubber insulation bushings and stainless steel enclosure into an integrated structure, with compact design, small volume and light weight, which is convenient for hoisting, installation and transportation. The fully sealed enclosure design effectively isolates moisture, dust, corrosive gases and other harmful substances, ensuring long-term stable operation of the equipment in outdoor harsh environments. The ZW7-33kV supports manual, electric and remote control operation (optional), and can be seamlessly connected with intelligent grid systems, which is suitable for both traditional power grid transformation and new intelligent power grid construction.
ZW7-33kV户外中压真空断路器是33kV中压配电网的核心设备，主要用于接通、承载和分断正常负荷电流，以及电力系统发生故障时，快速切断短路电流、过载电流，避免故障扩大，保护电网设备安全运行。产品将真空灭弧室、弹簧操动机构、硅橡胶绝缘套管与不锈钢外壳集成一体，设计紧凑、体积小、重量轻，便于吊装、安装和运输。全密封外壳设计，有效隔绝水分、灰尘、腐蚀性气体等有害物质，确保设备在户外恶劣环境下长期稳定运行。ZW7-33kV支持手动、电动及远程控制操作（可选配），可与智能电网系统无缝对接，适配传统电网改造与新型智能电网建设双重场景。
2. Core Features 核心特点
1. Excellent Vacuum Arc-Extinguishing Performance（真空灭弧性能优异）
ZW7-33kV adopts high-quality ceramic vacuum interrupter with vacuum degree ≤10⁻⁵ Pa, which can extinguish arc within 2ms, with no arc reburning and no harmful gas emission during operation, environmental protection and pollution-free. The rated short-circuit breaking current reaches 25kA/31.5kA, and it can withstand multiple fault breaking operations without maintenance, which effectively ensures the reliability of power grid protection.
ZW7-33kV采用优质陶瓷真空灭弧室，真空度≤10⁻⁵ Pa，2毫秒内即可完成灭弧，无电弧重燃现象，运行过程中不产生有害气体，环保无污染。额定短路开断电流达25kA/31.5kA，可承受多次故障开断操作而无需维护，有效保障电网保护的可靠性。
2. High-Strength Spring Operating Mechanism（高强度弹簧操动机构）
Equipped with integral cast aluminum spring operating mechanism, which has stable mechanical performance, high action accuracy and strong anti-jamming ability. The mechanical life is ≥12000 times, the electrical life is ≥4000 times, and it is lubricated for life, no need for regular maintenance, which greatly reduces the operation and maintenance cost of the equipment.
配备整体铸铝弹簧操动机构，机械性能稳定、动作精度高、抗卡滞能力强，机械寿命≥12000次，电气寿命≥4000次，终身润滑，无需定期维护，大幅降低设备运维成本。
3. Strong Environmental Adaptability（环境适应性极强）
The enclosure is made of 304 stainless steel, treated with electrostatic spraying anti-corrosion and anti-pollution coating, with protection grade up to IP67, which can withstand temporary flooding (≤1.5m) and extreme temperature changes (-45℃ ~ +75℃). The silicone rubber insulation bushings have excellent hydrophobicity and anti-pollution performance, creepage distance ≥1000mm, meeting the requirements of pollution level IV, suitable for high altitude (≤4000m), coastal salt spray, heavy industrial pollution and other harsh environments.
外壳采用304不锈钢材质，经静电喷涂防腐防污涂层处理，防护等级达IP67，可承受短时积水浸泡（≤1.5m）与极端温变（-45℃~+75℃）；硅橡胶绝缘套管具备优异的憎水性和防污性能，爬电距离≥1000mm，满足IV级污秽等级要求，适配高海拔（≤4000m）、沿海盐雾、工业重污染等恶劣环境。
4. Compact Structure & Easy Installation（结构紧凑，安装便捷）
Adopts integrated design, small volume and light weight, which is convenient for hoisting and transportation. The base is equipped with standard mounting holes, which can be quickly fixed on the concrete foundation or steel frame. The wiring terminals are clearly marked, and the wiring is simple and convenient, which can greatly shorten the on-site installation and commissioning time.
采用一体化设计，体积小、重量轻，便于吊装和运输；底座设有标准安装孔，可快速固定于混凝土基础或钢架上；接线端子标识清晰，布线简单便捷，可大幅缩短现场安装调试时间。
5. Perfect Protection & Interlocking Functions（保护与联锁功能完善）
Equipped with perfect overcurrent protection, short-circuit protection and undervoltage protection functions (optional), which can quickly respond to various faults of the power grid and cut off the fault circuit in time. It is equipped with reliable mechanical interlocking and electrical interlocking devices, which can effectively prevent misoperations such as closing with load, opening with ground switch closed, and ensure the safety of operators and equipment.
具备完善的过电流保护、短路保护、欠电压保护功能（可选配），可快速响应电网各类故障，及时切断故障电路；配备可靠的机械联锁和电气联锁装置，可有效防止带负荷合闸、带接地开关合闸等误操作，保障操作人员及设备安全。
6. Intelligent Upgrade Compatibility（智能升级兼容）
The ZW7-33kV supports intelligent upgrade, and can be equipped with CT/PT modules, wireless communication modules (4G/5G/LoRa) and remote monitoring terminals according to user needs, realizing real-time monitoring of equipment operating status, fault alarm, data recording and remote control, which is suitable for smart grid construction.
ZW7-33kV支持智能升级，可根据用户需求选配CT/PT模块、无线通信模块（4G/5G/LoRa）及远程监测终端，实现设备运行状态实时监测、故障报警、数据记录及远程控制，适配智能电网建设需求。
3. Technical Parameters 技术参数
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Item 项目
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Specification 技术指标
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|---|---|
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Product Model 产品型号
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ZW7-33kV（Um=40.5kV）
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Rated Voltage 额定电压
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33kV
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Rated Frequency 额定频率
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50Hz / 60Hz（可选）
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Rated Current 额定电流
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630A / 1250A / 2000A（可选）
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Rated Short-Circuit Breaking Current 额定短路开断电流
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25kA / 31.5kA
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Rated Short-Time Withstand Current 额定短时耐受电流
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25kA / 31.5kA（4s）
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Rated Peak Withstand Current 额定峰值耐受电流
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63kA / 80kA
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Arc-Extinguishing Medium 灭弧介质
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高真空（≤10⁻⁵ Pa）
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Operating Mechanism 操动机构
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弹簧操动机构（手动/电动可选）
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Mechanical Life 机械寿命
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≥12000次
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Electrical Life 电气寿命
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≥4000次
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Protection Grade 防护等级
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IP67（外壳）；IP68（套管，可选）
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Ambient Temperature 环境温度
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-45℃ ~ +75℃
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Applicable Altitude 适用海拔
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≤4000m（可定制更高海拔）
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Pollution Level 污秽等级
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IV级
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Insulation Level 绝缘水平
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工频耐受电压：95kV（1min）；雷电冲击耐受电压：200kV
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Enclosure Material 外壳材质
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304不锈钢（标准）；316L不锈钢（沿海专用）
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Execution Standard 执行标准
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IEC 62271-100、GB 1984、GB/T 11022
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4. Application Scenarios 应用场景
1. 33kV Outdoor Substations：Main switching and protection equipment for 33kV primary and secondary outdoor substations, responsible for grid connection and fault isolation.（33kV户外变电站：33kV一次、二次户外变电站的主开关与保护设备，承担电网连接与故障隔离任务。）
2. 33kV Power Transmission Lines：Line switching, sectionalizing and fault protection for urban and rural 33kV high-voltage transmission lines, improving grid operation reliability.（33kV输电线路：城乡33kV高压输电线路的投切、分段及故障保护，提升电网运行可靠性。）
3. Large Industrial & Mining Enterprises：Power supply protection for steel mills, mines, chemical plants and other large enterprises with 33kV incoming lines, ensuring stable power supply for production.（大型工矿企业：33kV进线的钢厂、矿山、化工厂等大型企业的供电保护，保障生产稳定供电。）
4. Renewable Energy Projects：Grid connection protection for large-scale solar farms, wind power plants and other new energy projects, realizing safe and stable grid connection of new energy power.（新能源项目：大型光伏电站、风电场等新能源项目的并网保护，实现新能源电力安全稳定并网。）
5. Remote & Harsh Environments：Power supply systems in plateaus, deserts, coastal areas and heavy industrial pollution areas, adapting to various harsh outdoor working conditions.（偏远恶劣环境：高原、沙漠、沿海及工业重污染地区的供电系统，适配各类恶劣户外工况。）
6. Smart Grid Construction：Intelligent distribution networks requiring remote control, status monitoring and data analysis, supporting the construction of smart cities and smart grids.（智能电网建设：需要远程控制、状态监测及数据分析的智能配电网，支撑智慧城市与智能电网建设。）
5. After-Sales Service 售后服务
1. Factory Direct Supply & Quality Assurance：All ZW7-33kV products are produced in strict accordance with IEC and GB standards, eta 100% factory tested before leaving the factory. We provide complete certification documents, including type test report, factory test report and product certificate. The vacuum interrupter and spring operating mechanism enjoy a 2-year free warranty, and lifelong maintenance service is provided.（工厂直供&品质保障：所有ZW7-33kV产品严格按IEC及国家标准生产，出厂前100%检测，提供型式试验报告、出厂试验报告、产品合格证等齐全资质；真空灭弧室与弹簧操动机构享2年免费质保，提供终身维修服务。）
2. Customization Service：According to the user’s actual power grid configuration, rated current, short-circuit breaking current, altitude, pollution level and other requirements, we provide personalized customization services for ZW7-33kV, including parameter adjustment, material replacement and intelligent function configuration. For export orders, we can customize parameters and certificates according to local grid standards and import requirements.（定制化服务：根据用户实际电网配置、额定电流、短路开断电流、海拔、污秽等级等要求，提供ZW7-33kV个性化定制服务，包括参数调整、材质更换、智能功能配置；出口订单可根据当地电网标准及进口要求，定制参数与资质文件。）
3. On-Site Technical Support：A professional technical team provides on-site installation guidance, wiring debugging, operation training and technical consultation services to ensure the product is installed and put into operation smoothly. For overseas projects, we can arrange technical personnel to go abroad for on-site guidance, or provide 7×24 hours online video guidance.（现场技术支持：专业技术团队提供现场安装指导、接线调试、操作培训及技术咨询服务，确保产品顺利安装投运；海外项目可安排技术人员出国现场指导，或提供7×24小时在线视频指导。）
4. Spare Parts Supply & Emergency Response：We have a complete spare parts supply system, with long-term supply of vacuum interrupters, silicone rubber bushings, spring operating mechanism components, seals and other spare parts for ZW7-33kV. For product faults, we respond within 24 hours and arrange spare parts delivery and on-site maintenance in a timely manner to minimize equipment downtime.（备品备件供应&应急响应：拥有完善的备品备件供应体系，长期供应ZW7-33kV真空灭弧室、硅橡胶套管、弹簧操动机构部件、密封件等备品备件；针对产品故障，24小时内响应，及时安排备品备件配送及现场维修，最大限度减少设备停机时间。）
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