IACM 38kv Outdoor High Voltage Air Break Switch

IACM series outdoor high voltage air break switches are three-phase disconnectors with air break mechanism, designed for pole top horizontal and vertical installation. Also referred to as load break switches, these devices are used for switching on and switching off operations in 11kV-33kV distribution lines, with the capability to break small magnetizing transformer currents and small currents on overhead lines. They act as visible isolation points for line segments, supporting safe maintenance work by providing a clear open-circuit state.

This product series includes two models: RH-B-F1 and RH-B-F2, both adapted to all types of distribution networks. They are particularly suitable for networks that require frequent maneuvering under severe climatic conditions, such as saline humidity environments, sandy areas, snowy regions, high altitude locations, industrial pollution zones and high density pollution areas. Each model is fitted with a manual operating mechanism for stable closing and opening operations in field conditions.

Core Models and Features of 38kV High Voltage Air Break Switches

RH-B-F1 Air Break Switch

The RH-B-F1 air break switch is fitted with an air cutoff device composed of high-speed stainless steel whips, delivering a rated breaking capacity of 50A. This model is designed for distribution lines with lower breaking current requirements and relatively stable load levels, providing consistent switching performance for routine line operation and maintenance. It comes with a standard manual operator for on-site closing and opening control, compatible with conventional pole top installation configurations.

RH-B-F2 Air Break Switch

The RH-B-F2 air break switch integrates arc quenching chambers, which provide a rated breaking capacity up to 100A. This model supports higher breaking current demands for distribution networks with more dynamic load profiles and more frequent load adjustments. Like the RH-B-F1 model, it is equipped with a manual operating mechanism for closing and opening, and maintains the same environmental adaptability for long-term outdoor deployment.

Technical Specifications of IACM Outdoor Air Break Switches

Application Scenarios for Outdoor High Voltage Air Break Switches

IACM series outdoor air break switches are applicable to various distribution network architectures, serving as switching devices for overhead distribution lines, pole-mounted transformer stations and sectionalized network nodes. They support frequent switching operations for routine maintenance, load adjustment and line isolation, meeting the operational demands of power distribution systems for different commercial operations.

These switches are widely deployed in urban power distribution networks, rural electrification systems, industrial park distribution systems and infrastructure power supply projects. For regions with special climatic conditions, they maintain stable performance in coastal areas with saline humidity, arid zones with frequent sandstorms, cold regions with long-term snow cover, and high-altitude locations, providing reliable switching solutions for networks with complex operating environments.

Installation and Operation Guidance for Pole Top Air Break Switches

These high voltage air break switches support both horizontal and vertical installation on pole tops, compatible with standard utility pole configurations in medium-voltage distribution systems. The installation follows conventional pole-mounted switchgear procedures, with no additional custom fixtures required for standard deployment.

Each unit is equipped with a manual operator, allowing trained on-site personnel to perform closing and opening operations directly. For daily maintenance, regular inspection of connecting terminals and arc-breaking components is recommended to maintain consistent operational performance. The stainless steel structure of the arc-breaking device supports long-term outdoor use with minimal routine maintenance input.

FAQ About High Voltage Air Break Switches

What is the difference between RH-B-F1 and RH-B-F2 air break switches?

The core difference lies in the breaking structure and rated breaking capacity. The RH-B-F1 model uses a high-speed stainless steel whip air cutoff device, with a rated breaking capacity of 50A. The RH-B-F2 model is fitted with arc quenching chambers, delivering a rated breaking capacity up to 100A. Under the same rated voltage level, both models share identical rated continuous current, short time withstand current, peak withstand current and BIL values.

Can IACM series air break switches be used in harsh climatic environments?

Yes. This series is designed for outdoor deployment and adapts to multiple severe climatic conditions, including saline humidity, sandy environments, snowy regions, high altitude areas, industrial pollution zones and high density pollution areas. It is suitable for distribution networks that require frequent switching maneuvers under complex environmental conditions.

What voltage levels are compatible with the IACM air break switch series?

The IACM series covers three rated voltage ranges: 11-15kV, 24-27kV and 33-38kV. Each voltage range is available in both RH-B-F1 and RH-B-F2 configurations, allowing commercial procurement teams to select appropriate models based on their line voltage and breaking current requirements.