Product Description
The IACM air-insulated load switch is a high-performance, eco-friendly device specifically designed for high-voltage applications. This series offers 12 kV, 24 kV, and 36 kV models suitable for outdoor environments and is a popular choice for rooftop renovations and new projects.
Unlike gas-insulated equipment, IACM uses an innovative multi-material design for maintenance-free operation, which lowers operating costs and eliminates the need for frequent on-site maintenance. It combines an advanced pneumatic system with high-performance components and is completely free of sulfur hexafluoride (SF6) gas. The device uses clean air for insulation and arc extinguishing, producing no greenhouse gas emissions or environmental pollution risks.


The IACM air-insulated load switch can interrupt and switch various types of currents (including line charging current, circulating current, and AC excitation current), ensuring smooth and reliable switching in a wide range of grid applications. With its flexibility and low power consumption, it can handle complex tasks like line sectioning, switching, and fault isolation.
The device comes with a clear and intuitive control panel interface, offering better protection and operational convenience during inspections, commissioning, and troubleshooting.
Designed to operate efficiently in harsh outdoor environments, the IACM combines efficiency, ease of use, and safety, making it a practical and eco-friendly choice for modern outdoor distribution systems.
Product Specifications

|
Characteristics |
IACM-S 24KV |
IACM-S 36KV |
|
Rated voltage (kV) |
24 |
36 |
|
Rated current (A) |
200/400 |
200/400 |
|
Breaking capacity: |
31.5 |
31.5 |
|
• No-load transformer (A) |
2.5 |
2.5 |
|
• Close loop current (A) |
200/400 |
200/400 |
|
• Off-load line (A) |
10 |
10 |
|
Rated peak closing capacity (kA) |
12.5 |
12.5 |
|
Rated lightning impulse withstand voltage (kV peak) |
125 |
170 |
|
• Across the isolating distance |
145 |
195 |
|
Rated 1 min power frequency withstand 50 Hz/1 min (kV) |
50 |
70 |
|
• Across the isolating distance |
60 |
80 |
|
Rated short-time withstand current (kA 1s) |
5 |
5 |
|
Rated peak withstand current (kA) |
12.5 |
12.5 |
|
Mechanical endurance (cc) |
1 000 |
1 000 |
Real-life Factory Photos

Our Product Advantage
Air-based arc extinguishing with visible isolation and safe maintenance features
The system utilizes air-based arc extinguishing combined with a series-connected disconnector; it is SF6-free, environmentally friendly, and maintenance-free. Upon opening, a clear air insulation gap is formed, allowing maintenance personnel to visually verify the de-energized state and ensuring safety during overhead transmission line maintenance.
Toggle-spring operating mechanism ensuring stable operation and preventing misoperation
Equipped with a toggle-spring mechanism that ensures synchronized three-pole operation, the opening and closing speeds remain independent of the force applied by the operator. An operating handle with a mechanical interlock function effectively eliminates the risk of misoperation.
High-performance composite insulators suitable for harsh outdoor environments
Features insulators constructed with an epoxy resin core rod and molded silicone rubber sheds, with customizable creepage distances. These insulators offer excellent resistance to pollution flashover, aging, and external mechanical damage, making them suitable for complex outdoor operating conditions.
Hot-dip galvanized steel structure with superior corrosion resistance and durability
All metal components undergo hot-dip galvanizing to ensure rust and corrosion resistance, enabling reliable long-term outdoor operation. The mechanical service life reaches 1,000 operations.
Modular assembly structure for easy pole-mounted installation
Utilizes a modular, pre-assembled structure that facilitates transportation and simplifies on-site installation.
Meets requirements for overseas projects
Complies with the IEC 62271 series of standards. Rated voltage options include 24kV or 36kV, and rated current options include 200A or 400A.
Detailed test reports are available, and customization services are supported.
FAQ
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