Product Introduction

Since the 1950s, the development of medium-voltage switchgear has gone through stages such as open-type, box-type, and metal-enclosed types. There are no longer any issues with meeting the functional requirements of the equipment, and the products have long been serialized and have a full range of applications. Compact size, maintenance-free, highly modular, safe, and reliable environmentally friendly gas-insulated ring main unit cabinets are rapidly developing, enabling remote monitoring, control, and management of power system distribution networks, meeting the needs for grid optimization, electrical safety, power management, and energy conservation and consumption reduction. The system can also be widely applied in intelligent distribution fields such as transportation, factories, hospitals, schools, buildings, residential communities, and commercial office buildings.

The HBN-12 energy-saving and environmentally friendly fully insulated ring main cabinet introduces production equipment and manufacturing technology to achieve localized production, greatly reducing manufacturing costs and shortening delivery cycles.

Product features

◇ Functional composite, integrated products

The inflatable housing of the switchgear is made of high-quality 2.5mm thick stainless steel plate welded by laser welding, ensuring reliable sealing of the airbox, high mechanical strength, good corrosion resistance, and a protection rating of IP67; The airbox is equipped with explosion-proof diaphragms, effectively preventing damage to people and equipment caused by excessive air pressure; Enclosing all conductive components inside the airbox not only avoids external environmental factors but also improves operational reliability, enabling maintenance-free (or low-maintenance) functionality while meeting miniaturization requirements. The switch uses a three-station system (isolation + grounding) + vacuum arc extinguisher, a currently mature configuration method that is especially suitable for current power grid operation and maintenance needs.

◇ Environmentally friendly and pollution-free

The insulation medium of the HBN-12 energy-saving and environmentally friendly fully insulated ring main unit is zero-grade dry air (purchased) or 99.99% pure N2 compliant with GB/T 8979-2008. The gas leakage will not affect the external environment and does not require any recycling treatment.

◇ Comprehensive mechanical interlocking

The operation panel of the HBN-12 energy-saving and environmentally friendly fully insulated ring main cabinet features comprehensive five-proof mechanical interlock functions, all of which are pre-configured internally. Please follow the instructions during operation, making it very convenient to use.

◇ Flexible and expandable design

The HBN-12 energy-saving and environmentally friendly fully insulated ring network cabinet features a modular design, allowing various modules to be combined with dedicated busbar connectors to achieve diverse unit combinations, maximizing the diverse and complex power distribution design solutions across China.

Product structure

1. Ammeter

2. Microcomputer integrated protection device

3. Capacitive live indicator

The live indicator shows whether the sleeve is live, and the three sockets below the indicator light can be used for secondary phase testing. The live indicator is equipped with a switch button, effectively extending its service life.

4. Fault indicator

Detects current in the power supply line; when short-circuit fault current or ground fault current occurs, an alarm indicator will appear.

5. Isolated observation window

Through this observation window, you can see the opening and closing status of the grounding switch and whether the isolating switch is closed or open

6. Grounding switch operation hole

By turning the grounding switch shaft with the operating handle, you can open and close the grounding switch

7. Main switch energy storage indicator

By observing the energy storage indicator of the main switch, you can understand the energy storage status of the main switch operating mechanism

8. Energy storage operation hole

The control handle rotates the energy storage mechanism shaft, allowing the main switch to store energy.

9. Padlock device for energy storage operation holes

The padlock plate linked by the padlock device blocks the energy storage operation hole; only by toggling the padlock can the operating handle be inserted into the operation port. When not in operation, a padlock can be configured to prevent unauthorized personnel from misoperating it.

10. Counter indicator

Indicates the cumulative number of trips and closes of the main switch operating mechanism.

11. Cable room door

12. Far/Local Conversion Switch

Control direction between the device's location and the backend control is realized through remote/local conversion switches