此插图显示了一个顶部 汇流排系统 由全屏蔽可分离电缆连接器组成，代表了欧式环网柜、箱式变电站及类似电力配电设备中多回路电缆连接的典型应用。
系统概述
顶 汇流排 系统通过标准接口将多个欧式电缆前连接器和后连接器串联互连，形成一个连续的、全绝缘的母线槽通道，能够同时连接多个出线回路。它取代了传统的裸露铜母线，实现了配电设备内部母线导体全绝缘、全封闭和触摸安全操作，显著提高了运行安全性和可靠性。
系统配置与工作原理
核心组件
European-type front/rear connectors: Integrally injection-molded from EPDM (ethylene propylene diene monomer) rubber with built-in semiconductive shielding layers, rated to IP67 protection, serving as the fundamental units of the bus bar system.
Connecting bus bar: Multiple connectors are linked in series via plug-in connections between adjacent connectors, forming a continuous conductive path.
接地装置：连接器底部的接地引线，如图所示，连接到半导体层上 连接器 地对地电位，将连接器外壳置于接地电位，实现安全触摸操作。
工作原理
Conductive connection: Cable conductors are electrically connected through the internal conductive components of the connectors; current is transmitted along the series-connected connector channel to provide parallel power supply across multiple circuits.
Electric field control: The built-in semiconductive shielding layers within the connectors uniformly distribute the electric field, preventing partial discharge caused by electric field concentration and ensuring insulation integrity.
Protection and safety: The fully sealed structure prevents ingress of moisture and dust; IP67 protection enables operation in harsh environments including high humidity and heavy dust; with the connector housing grounded, maintenance personnel face no risk of electric shock upon contact.
系统特点与优势
| 特征 | Advantage Description |
|---|---|
| Full insulation and full enclosure | No exposed live parts; touch-safe after housing is grounded, eliminating electric shock hazards; IP67 protection rating provides resistance to moisture, dust, and corrosion |
| Modular design | Standardized connector units allow flexible expansion based on circuit quantity; easy installation with no field casting or welding required |
| High reliability | Integral injection molding process produces a seamless, void-free structure with no risk of long-term aging or cracking; service life exceeding 20 years |
| Safe operation and maintenance | Grounded connector housing allows direct contact by maintenance personnel; no exposed bus bars, eliminating short-circuit faults caused by small animals or foreign objects |
| Space optimization | Compact structure with minimal footprint, compatible with the confined interior spaces of ring main units and pad-mounted substations |
典型应用场景
Internal bus bar in European-type ring main units: Replaces conventional copper bus bars to achieve fully insulated connections for multiple outgoing circuits; widely used in 10 kV, 20 kV, and 35 kV ring main units.
Bus bar system in pad-mounted substations: Multi-circuit connections on the high-voltage side within pad-mounted substations; compatible with the harsh operating environments of both indoor and outdoor pad-mounted substations.
Cable junction box bus bar: Multi-circuit tapping within cable junction boxes, enabling parallel power supply for multiple cables without the need for additional cable trays or bus bar bridges.
Power distribution systems in industrial and mining enterprises: Bus bar connections for power distribution equipment in humid, dusty, and corrosive environments, enhancing the system’s resistance to contamination and corrosion.
安装与维护指南
Installation Guidelines
Strip the cable in accordance with process requirements, ensuring that stripped lengths and dimensions conform to connector specifications to avoid damage to the cable insulation.
Clean the interface before connector installation, apply silicone grease evenly, and ensure the connector is fully seated with a reliable, secure connection free of looseness or misalignment.
Grounding leads must be reliably earthed to ensure the connector housing is maintained at ground potential, achieving touch-safe operation.
After installation, inspect the connector sealing surfaces to confirm no gaps or damage, ensuring IP67 protection performance is maintained.
维护指南
Periodically inspect the external condition of connectors for cracks, damage, discharge marks, or contamination buildup, and verify that connections are tight and free of looseness.
Periodically test insulation resistance and contact resistance of connectors to confirm performance meets requirements and to identify potential faults in a timely manner.
Clean connector surfaces to remove accumulated dust and contamination; prevent oil and chemical substances from corroding the rubber connector housing.
When abnormalities such as cracks, physical damage, discharge, or insulation resistance exceeding permissible limits are detected, the affected connectors must be replaced promptly; continued operation with known defects is strictly prohibited.
适用的标准和认证
International standard: IEC 60840, Test methods and requirements for power cables with extruded insulation and their accessories for rated voltages above 30 kV (Um = 36 kV) up to 150 kV (Um = 170 kV)
国家标准：GB/T 12706 额定电压1kV（Um=1.2kV）至35kV（Um=40.5kV）挤塑绝缘电力电缆及附件；GB/T 11022 高压开关设备通用技术条件 switchgear 和控制装置标准
All system components have passed type tests conducted by the National Wire and Cable Quality Supervision and Inspection Center and comply with national electric power industry standards.
附录：产品概述图
