HGL系列负荷隔离开关从63~4000A分18个规格是模块化设计基础型，具有三极，四极(三极+可通断中性极)，适用于电路和接通与分断或电气隔离，1000A以上只做电气隔离。交流50赫兹，额定电压至1000V，直流额定电压至440V，额定电流至4000A。用于不频繁接通与分断电路。

正面设有标记窗口指示触头通断状态。

根据需要可提供后面观察窗口，直接观察触头通断状态，窗口样式见HGL-125~4000A/H柜后操作负荷隔离开关。

产品符合国家标准GB/T.14048.3-2008《低压开关设备和控制设备低压开关、隔离器、隔离开关及熔断器组合电器》要求。

The HGL series load disconnecting switches feature a modular design with 18 specifications ranging from 63 A to 4000 A; they are available in three-pole and four-pole configurations (three-pole + optional neutral pole for switching), and are suitable for circuit connection, switching, or electrical isolation; for currents above 1000 A, these switches are exclusively used for electrical isolation. The switches operate at an AC frequency of 50 Hz, with rated voltages up to 1000 V and DC rated voltages up to 440 V, and rated currents up to 4000 A. They are designed for non-frequent circuit connection and switching operations.

The front panel features a marker window that indicates the contact's on/off state.

Depending on requirements, a rear observation window may be provided for direct observation of the contact's switching state; the window design is shown in the "HGL-125–4000A/H Cabinet Rear

Operation Load Break Circuit Breaker" documentation.

The product complies with the requirements of the national standard GB/T 14048.3-2008 "Low-voltage switchgear and controlgear – Low-voltage switches, isolators, disconnectors, and fuse combination equipment