SM Series Busbar Insulator

Introduction to SM Series Busbar Insulators

SM busbar insulators are fundamental components in electrical systems, acting as conductive pathways for the distribution of power within various electrical apparatus, including switchgear and substations. These specialized components play a critical role by providing both essential electrical insulation and robust mechanical support for busbars. The designation “SM” refers to a widely adopted industry standard or a common design type, with variations in size, electrical ratings, or mechanical properties often indicated by numerical suffixes, such as SM-25 or SM-76.

At VIOX, our SM busbar insulators are engineered to excellence, designed specifically for low to medium voltage applications ranging from 660V to 4500V. Our insulators feature the characteristic drum shape with brass or white iron zincate threaded female inserts on both resting sides, allowing for secure mounting with various screw types.

Function and Purpose of VIOX SM Series Busbar Insulators

The primary functions of SM busbar insulators are twofold: to provide electrical insulation and to offer mechanical support to the busbars. In their role as electrical insulators, these components act as a non-conductive barrier, effectively preventing the flow of electrical current between the live busbar and its supporting structure, as well as any other adjacent conductive components within the electrical system. This crucial insulation property significantly reduces the risk of dangerous short circuits, potentially catastrophic electrical fires, and damaging arcing faults.

Beyond their insulating capabilities, SM busbar insulators also serve as a stable and secure mounting point for busbars. They securely hold the busbars in their designated positions, effectively preventing excessive movement or potentially damaging vibrations that could compromise the electrical connections or the structural integrity of the system.

VIOX SM Busbar Insulator Series

VIOX offers two premium series of SM busbar insulators, meticulously engineered to meet diverse electrical system requirements:

SM-A Series Busbar Insulators

The SM-A Series busbar insulators are designed to provide superior insulation and support for busbars in electrical systems. Made from high-quality BMC and SMC, these insulators can withstand extreme temperatures and mechanical stresses. They come in various models with different specifications, ranging from SM-20 to SM-76, each designed for specific applications and load requirements.

SM-A Series insulators feature customizable options including color, insert material, and other properties to meet specific customer requirements. They typically offer tensile strength ranging from 300 to 1500 LBS and voltage withstand capabilities from 5 to 25 KV, depending on the model.

SM-A Series Busbar Insulators

SM-B Series Busbar Insulators

Similar to the SM-A Series, the SM-B Series busbar insulators provide insulation and support for busbars in electrical systems. They are also constructed from high-quality BMC and SMC for durability and strength. The SM-B Series offers comparable specifications to the SM-A Series but may have slight differences in design and performance characteristics.

SM-B Series Busbar Insulators

Both SM-A and SM-B Series insulators comply with international standards for reliable performance and are available with brass or steel inserts with zinc coating for enhanced corrosion resistance.

Key Specifications and Technical Parameters

Common Models and Their Specifications

VIOX SM busbar insulators are available in multiple sizes to accommodate different busbar dimensions and load requirements. Common models include:

SM Busbar Insulator Dimension and Size Chart

Electrical Parameters

SM busbar insulators generally have an operating temperature range of -40°C to +140°C, allowing for reliable performance across a wide spectrum of environmental conditions. Materials like BMC and SMC offer good thermal stability within this range, maintaining their shape and insulating properties.

In terms of voltage ratings, VIOX SM busbar insulators are primarily designed for low voltage applications, typically ranging from 660V to 4500V. However, certain models within the SM series are capable of withstanding higher voltages, with voltage withstand ratings spanning from 6kV to 25kV depending on the specific model and size.

Mechanical Parameters

VIOX SM busbar insulators offer various mechanical specifications:

• Tensile strength ranging from 300 LBS (SM-20) to 1500 LBS (SM-76)
• Torque strength ranging from 4 FTLBS (SM-20) to 40 FTLBS (SM-76)
• Centil strength ranging from 2000N to 5500N depending on the model

These mechanical properties ensure that the insulators can withstand physical stresses, including compression, tension, and vibration, maintaining their structural integrity under various operating conditions.

Material Composition and Properties

VIOX SM busbar insulators are primarily made from BMC and SMC reinforced with fiberglass, which provides excellent electrical and mechanical properties.

These materials offer:

• High dielectric strength (approaching 4 kV/mm)
• Excellent insulation resistance
• Thermal stability with operating temperature range from -40°C to +140°C
• Fire rating of UL94-V0, indicating high flame retardance
• Good resistance to tracking (formation of conductive carbon paths)
• Resistance to UV radiation and environmental factors

The insulators typically feature brass or steel inserts with zinc coating for enhanced corrosion resistance, ensuring long-term reliability in various environmental conditions.

Applications of VIOX SM Busbar Insulators

VIOX SM busbar insulators are commonly used in distribution boxes where they provide insulation and support for busbars that distribute electrical power to various circuits. In these applications, the insulators ensure that the busbars maintain proper spacing and insulation from the enclosure and other components, preventing electrical faults and ensuring safe operation.

In switchgear applications, VIOX SM busbar insulators support the busbars that connect various switching devices and circuit protection components. The insulators ensure electrical isolation between phases and between busbars and the enclosure, preventing short circuits and maintaining system reliability.

VIOX SM busbar insulators are increasingly used in renewable energy systems such as solar inverters and wind power installations. In these applications, the insulators provide critical support and insulation for busbars that handle the power generated by renewable sources, ensuring efficient and safe power transmission and distribution.

Beyond specific electrical equipment, VIOX SM busbar insulators find applications in various industrial and commercial settings where electrical power distribution is required. Their robust construction and high-performance materials make them suitable for a wide range of industrial applications, ensuring reliable and safe operation.

How to Select the Right VIOX SM Busbar Insulator

When selecting a VIOX SM busbar insulator, the operating voltage of the system is a primary consideration. Low voltage applications (660V to 4500V) typically use standard SM busbar insulators, with model selection based on the specific voltage requirements. The insulator’s voltage withstand capability should exceed the system’s maximum operating voltage, including potential transient overvoltages.

The mechanical loads that the insulator will experience, particularly during fault conditions such as short circuits, must be carefully considered. Engineers should select an insulator with appropriate tensile and torque strength ratings to withstand these loads. For applications with significant mechanical stress, larger models with higher strength ratings are recommended.

Environmental conditions such as temperature, humidity, pollution, and exposure to UV radiation can significantly impact insulator performance. VIOX SM busbar insulators with operating temperature ranges from -40°C to +140°C are suitable for most applications. For outdoor or harsh industrial environments, additional considerations for pollution resistance, hydrophobicity, and UV resistance may be necessary.

Quality Assurance and Certifications

Quality VIOX SM busbar insulators comply with various international standards and certifications, including:

• CE certification for European market requirements
• REACH certification for chemical compliance
• RoHS certification for hazardous substance restrictions
• SGS certification for independent quality verification

These certifications provide assurance that the insulators meet established quality and safety standards, making them suitable for use in critical electrical applications.

Conclusion

VIOX SM busbar insulators are critical components for ensuring the safe and reliable operation of low to medium voltage electrical systems. Their dual function of providing electrical insulation and mechanical support is essential in a wide range of applications, including power distribution cabinets, switchgear, inverters, and renewable energy systems.

Choosing VIOX for your SM busbar insulator needs means investing in quality, reliability, and safety for your electrical systems. Our comprehensive range of models and specifications ensures that you’ll find the perfect solution for your specific requirements. Contact VIOX today to discuss your busbar insulator needs and discover how our products can enhance the performance and longevity of your electrical installations.