IACM‑S Air‑break Overhead Load‑break Disconnector Switch
IACM‑S Air‑break Overhead Load‑break Disconnector Switch

IACM‑S Air‑break Overhead Load‑break Disconnector Switch

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.
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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.

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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

 

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Characteristics

IACM-S 24KV

IACM-S 36KV

Rated voltage (kV)

24

36

Rated current (A)

200/400

200/400

Breaking capacity:
• Active load (A)

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)
• To earth and between poles

125

170

• Across the isolating distance

145

195

Rated 1 min power frequency withstand 50 Hz/1 min (kV)
• To earth and between poles

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

 

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Our Product Advantage

01/

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.

02/

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.

03/

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.

04/

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.

05/

Modular assembly structure for easy pole-mounted installation

Utilizes a modular, pre-assembled structure that facilitates transportation and simplifies on-site installation.

06/

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

 

Q1: What type of switch is the IACM?

A: The IACM is an air-break outdoor overhead load-break isolating switch designed for three-phase AC 50Hz medium-voltage overhead distribution lines. It offers dual functionality - load breaking and visible isolation - and is SF6-free.

Q2: What are the voltage and current specifications?

A: Voltage ratings include 24kV and 36kV; rated current options are 200A and 400A. It has a mechanical lifespan of 1,000 operations.

Q3: What are the pole installation requirements?

A: It is designed for cross-arm mounting on 11–14m poles. The unit features a modular, pre-assembled structure, making transport and on-pole installation convenient - ideal for remote mountainous areas or locations with difficult access.

Q4: Can the product be used in dusty or coastal (salt-spray) environments?

A: Yes. The insulators feature an epoxy resin core with molded silicone rubber sheds, providing ample creepage distance and resistance to pollution flashover, aging, and external damage. The metal frame is hot-dip galvanized for corrosion resistance, making it suitable for harsh outdoor conditions.

Q5: What standards does the product meet? Are test reports available?

A: The product complies with IEC international standards. Third-party test reports are available.

Q6: Is customization available?

A: Yes; customization services are available, including for product packaging.

Q7: Does the product require routine maintenance?

A: It features an air-break structure and a maintenance-free design, though routine inspections are recommended.

Q8: Can it interrupt short-circuit fault currents?

A: It can withstand short-circuit surge currents but cannot interrupt short-circuit faults; it is intended only for switching operations involving normal load currents, no-load transformers, and no-load lines.

 

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