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ZW32-33kV Outdoor Vacuum Circuit Breaker | Source Manufacturer of Medium Voltage Switchgear
Short Description:
Our 33kV Outdoor Medium Voltage Vacuum Circuit Breaker (VCB) is a high-end switching and protection device engineered for 33kV, 50Hz three-phase AC outdoor power systems. Adopting advanced vacuum arc-extinguishing technology, it features zero gas leakage, no environmental pollution, and ultra-fast arc extinction. The product is equipped with a high-strength spring operating mechanism, ensuring stable action and high mechanical reliability. Its insulation system uses hydrophobic silicone rubber bushings, providing excellent resistance to pollution, salt spray, and ultraviolet radiation. Compliant with IEC 62271-100 and GB 1984 standards, this VCB is designed for harsh outdoor conditions, including high altitudes (≤4000m) and heavy pollution areas. It is widely used in 33kV substations, power transmission lines, industrial parks, and renewable energy projects, providing a safe and reliable solution for grid protection and control.
1. Product Overview 产品概述
The 33kV Outdoor Medium Voltage Vacuum Circuit Breaker is a key component in the 33kV power distribution network, primarily used to close, carry, and break normal load current, as well as to quickly isolate short-circuit and overload faults. It integrates a vacuum interrupter, operating mechanism, insulation bushings, and a stainless steel enclosure into a compact, weatherproof unit. The fully sealed design prevents the ingress of moisture, dust, and corrosive gases, ensuring long-term stable operation. The product supports manual, electric, and remote control operation (optional), making it suitable for both conventional and smart grid applications. With its high insulation level and robust structural design, it effectively meets the operational requirements of 33kV outdoor power systems in various climates and environments.
33kV户外中压真空断路器是33kV配电网的核心组件，主要用于接通、承载和分断正常负荷电流，并快速隔离短路、过载等故障。产品将真空灭弧室、操作机构、绝缘套管与不锈钢外壳集成于一体，结构紧凑、耐候性强。全密封设计可有效阻挡水分、灰尘及腐蚀性气体侵入，保障长期稳定运行。支持手动、电动及远程控制操作（可选配），适配传统电网与智能电网双重应用场景。凭借高绝缘水平与坚固的结构设计，可充分满足不同气候、不同环境下33kV户外电力系统的运行需求。
2. Core Features 核心特点
1. Advanced Vacuum Arc-Extinguishing System（先进真空灭弧系统）
Uses high-quality ceramic or glass vacuum interrupters with a vacuum degree of ≤10⁻⁵ Pa. Achieves arc extinction within 2ms, with no arc reburning. Rated short-circuit breaking current up to 31.5kA, capable of withstanding multiple fault breaking operations without maintenance.
采用优质陶瓷或玻璃真空灭弧室，真空度≤10⁻⁵ Pa，2毫秒内即可完成灭弧，无电弧重燃现象。额定短路开断电流可达31.5kA，可承受多次故障开断操作而无需维护。
2. Superior Insulation Performance for Heavy Pollution（重污区专用优异绝缘性能）
Hydrophobic silicone rubber insulation bushings with creepage distance ≥1000mm. Effectively prevents pollution flashover, suitable for areas with severe industrial pollution, coastal salt spray, and high humidity. Meets the requirements of pollution level IV.
采用憎水性硅橡胶绝缘套管，爬电距离≥1000mm，可有效防止污闪事故，适配工业重污染、沿海盐雾、高湿度等场景，满足IV级污秽等级要求。
3. High Altitude Adaptability（高海拔适配性强）
Special structural design for high altitude environments (≤4000m). Optimized insulation spacing and arc-extinguishing structure ensure reliable operation without insulation breakdown in thin air conditions.
针对高海拔环境（≤4000m）进行专项结构设计，优化绝缘间距与灭弧结构，确保在空气稀薄条件下无绝缘击穿风险，运行可靠。
4. Robust & Maintenance-Free Mechanism（坚固免维护操作机构）
Integral cast aluminum spring operating mechanism with mechanical life ≥12000 times. Lubricated for life, no need for regular maintenance. Equipped with anti-jamming design, suitable for frequent operation.
采用整体铸铝弹簧操作机构，机械寿命≥12000次，终身润滑，无需定期维护。具备防卡滞设计，适配频繁操作场景。
5. Top-Tier Weatherproof Protection（顶级耐候防护）
304/316L stainless steel enclosure with IP67 protection grade. Can withstand temporary flooding (≤1.5m) and extreme temperature changes (-45℃ ~ +75℃). Resistant to acid rain, ultraviolet radiation, and rodent damage.
采用304/316L不锈钢外壳，防护等级达IP67，可承受短时积水浸泡（≤1.5m）与极端温变（-45℃~+75℃），耐酸雨、抗紫外线、防鼠害。
6. Intelligent Monitoring Compatibility（智能监测兼容）
Supports integration with smart grid systems. Optional CT/PT modules, wireless communication (4G/5G/LoRa), and remote monitoring terminals for real-time tracking of operating status, fault alarms, and data recording.
支持与智能电网系统无缝对接，可选配CT/PT模块、无线通信（4G/5G/LoRa）及远程监测终端，实现运行状态实时追踪、故障报警与数据记录。
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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ZW72-33 / ZW32-33 (customizable)
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Rated Voltage 额定电压
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33kV (Um=40.5kV)
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Rated Frequency 额定频率
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50Hz / 60Hz (optional)
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Rated Current 额定电流
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630A / 1250A / 2000A (optional)
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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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High Vacuum (≤10⁻⁵ Pa)
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Operating Mechanism 操作机构
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Permanent Magnet / Spring Operating Mechanism
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Mechanical Life 机械寿命
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≥12000 times
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Electrical Life 电气寿命
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≥4000 times
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Protection Grade 防护等级
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IP67 (Enclosure); IP68 (Bushings, optional)
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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 (customizable for higher altitude)
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Pollution Level 污秽等级
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Grade IV
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Insulation Level 绝缘水平
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Power frequency: 95kV (1min); Lightning impulse: 200kV
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Enclosure Material 外壳材质
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304 Stainless Steel (Standard); 316L (Coastal)
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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
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33kV Outdoor Substations：Main switching and protection equipment for 33kV primary and secondary substations.（33kV户外变电站：33kV一次、二次变电站的主开关与保护设备。）
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33kV Power Transmission Lines：Line switching, fault isolation, and sectionalizing for urban and rural 33kV grids.（33kV输电线路：城乡33kV电网的线路投切、故障隔离与分段。）
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Large Industrial & Mining Enterprises：Power supply protection for steel mills, mines, and chemical plants with 33kV incoming lines.（大型工矿企业：33kV进线的钢厂、矿山、化工厂供电保护。）
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Renewable Energy Projects：Grid connection protection for large-scale solar farms and wind power plants.（新能源项目：大型光伏电站、风电场的并网保护。）
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Remote & Harsh Environments：Power supply systems in plateaus, deserts, coastal areas, and heavy industrial zones.（偏远恶劣环境：高原、沙漠、沿海及重工业区的供电系统。）
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Smart Grid Construction：Intelligent distribution networks requiring remote control and status monitoring.（智能电网建设：需要远程控制与状态监测的智能配电网。）
5. After-Sales Service 售后服务
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Factory Direct Supply & Certification Assurance：All products pass 100% factory testing. Provide complete certification documents, including IEC type test report, SONCAP certificate (for Nigeria), and factory inspection report. 2-year free warranty for the vacuum interrupter and mechanism.（工厂直供&认证保障：所有产品100%出厂检测，提供IEC型式试验报告、尼日利亚SONCAP认证、出厂检验报告等齐全资质。真空灭弧室与机构享2年免费质保。）
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Customized Solution for Export：According to the target market (e.g., Nigeria, Southeast Asia), customize technical parameters (such as frequency, voltage) and certification documents to meet local grid standards and import requirements.（出口定制化方案：根据目标市场（如尼日利亚、东南亚），定制技术参数（频率、电压）与认证文件，符合当地电网标准与进口要求。）
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On-Site Technical Support：Professional engineers provide on-site installation guidance, commissioning, and operation training. For overseas projects, we can arrange technical personnel to go abroad or provide online video guidance 24/7.（现场技术支持：专业工程师提供现场安装指导、调试及操作培训；海外项目可安排人员出国，或提供7×24小时在线视频指导。）
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Long-Term Spare Parts Supply：Establish a global spare parts warehouse, providing long-term supply of vacuum interrupters, silicone rubber bushings, operating mechanism components, and seals. Ensure fast delivery to reduce equipment downtime.（长期备品备件供应：设立全球备品备件仓库，长期供应真空灭弧室、硅橡胶套管、操作机构部件及密封件，确保快速配送，减少设备停机时间。）
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