WEG MSW 12 B3 H - ROTARY DISCONNECTOR MSW 12 B3 H
WEG

MSW 12 B3 H

UPC: 7909018874814

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Overview

The WEG MSW 12 B3 H Rotary Disconnector is a robust, high-performance disconnect switch designed to provide a visible means of isolation for motors, transformers, and other critical electrical equipment in industrial environments. Engineered by WEG, a global leader in electric motor and automation solutions, this rotary disconnector ensures reliable de-energization of systems during maintenance, repair, or emergency shutdowns, enhancing operational safety and compliance with international standards. With a focus on durability and precision, the MSW 12 B3 H is ideal for applications where worker safety and equipment protection are paramount, including manufacturing plants, power generation facilities, water treatment plants, and commercial buildings with heavy electrical loads. This disconnect switch is specifically designed for applications requiring a clear, visible break in the circuit to confirm isolation before maintenance begins. The rotary mechanism allows for quick and secure operation, minimizing downtime while ensuring that equipment remains safely de-energized. The MSW 12 B3 H is lockout/tagout (LOTO) capable, meeting OSHA and other regulatory requirements for workplace safety. Its compact and rugged design makes it suitable for both indoor and outdoor installations, with options for wall mounting or panel integration, depending on the application. WEG’s reputation for engineering excellence is reflected in the MSW 12 B3 H, which incorporates high-quality materials and advanced manufacturing processes to deliver long-lasting performance. The switch is built to withstand harsh industrial conditions, including exposure to dust, moisture, and temperature variations, ensuring reliable operation in diverse environments. Whether used in conjunction with motor control centers, switchgear, or distribution panels, this rotary disconnector provides a dependable solution for electrical isolation, reducing the risk of arc flash and electrical hazards during service operations. Professionals in the electrical industry rely on WEG products for their reliability, efficiency, and adherence to global standards. The MSW 12 B3 H is no exception, offering a cost-effective yet high-quality alternative to traditional circuit breakers or knife switches. Its simple yet effective design allows for easy installation and maintenance, with minimal training required for personnel. Additionally, WEG’s extensive global support network ensures that customers receive timely technical assistance, spare parts, and training, further enhancing the value of this disconnect switch. Ideal for use in industries such as oil and gas, mining, chemical processing, and food and beverage, the WEG MSW 12 B3 H Rotary Disconnector is a trusted choice for engineers and maintenance teams seeking a safe, efficient, and compliant solution for electrical isolation. By integrating this disconnect switch into your electrical system, you not only improve safety but also streamline maintenance workflows, reduce downtime, and extend the lifespan of your equipment. Choose WEG for uncompromising quality and performance in every application.
  • Visible isolation for safe maintenance and repairs
  • Lockout/tagout (LOTO) capable for OSHA compliance
  • Rugged design for indoor/outdoor industrial environments
  • Quick and secure rotary operation for minimal downtime
  • WEG-engineered reliability with global support

Specifications

Mounting Type
Wall Mount / Panel Mount
Poles
3P
Series
MSW
Package Weight (Imperial)
0.414 LB
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Frequently Asked Questions about WEG

What certifications and standards do WEG products comply with?

WEG products meet extensive international standards across multiple critical categories, including safety, electromagnetic compatibility (EMC), functional safety, and regulatory compliance. Key certifications include UL, cUL, CE, TÜV Rheinland, and compliance with international standards such as EN 61800 series, IEC 61508, ISO 13849-1, and directives like Low Voltage (2014/35/EU), EMC (2014/30/EU), and RoHS. Their products are certified for safe operation in various industrial environments, with specific standards covering electrical safety, thermal performance, electromagnetic immunity, and environmental protection.

What is WEG's warranty policy?

WEG offers an 18-month standard warranty for automation products, covering defects in workmanship and materials. The warranty requires proper transportation, handling, storage, and installation within specified environmental conditions. Repairs must be performed by authorized WEG service, and the warranty is limited to the replacement or repair of the product itself, excluding consequential damages. Extended warranty options are available, including purchasing additional coverage at 2.5% of the product's selling price per year, up to 4 additional years.

What industries and applications are WEG products used for?

WEG products are extensively used across multiple industrial sectors, including packaging equipment, material handling, food processing, pumps, medical/lab equipment, door/gate openers, office machinery, and lawn/garden applications. Their versatile DC motors and variable frequency drives (VFDs) are designed for general industrial use, with solutions ranging from off-the-shelf products to custom OEM designs that meet UL/CSA standards for diverse manufacturing and processing environments.

What technical support does WEG offer?

WEG offers comprehensive technical support through multiple channels, including a dedicated Automation Service Department accessible via toll-free phone (1-877-934-3748) and email ([email protected]). They maintain a global network of accredited service centers worldwide, which customers can locate on their website. Additionally, WEG provides warranty support and technical assistance for their industrial automation products, with pre-approval required for warranty repairs.

What are the key features of WEG products?

WEG products feature advanced industrial automation technologies with key characteristics including high performance, flexibility, and connectivity. Their flagship CFW900 Variable Speed Drive demonstrates core product strengths: intelligent thermal management, built-in safety functions, IoT readiness, advanced energy saving capabilities, and comprehensive communication protocols. WEG drives offer robust performance with features like 150% overload capacity, modern graphic HMI, plug-and-play expansion modules, and compatibility across multiple industrial segments including food and beverage, pulp and paper, and manufacturing.

What communication protocols do WEG products support?

WEG products support multiple industrial communication protocols across their product lines, including EtherNet/IP, Modbus-TCP, Modbus-RTU, CANopen, and optional protocols like Profibus-DP and DeviceNet. Specifically, the PLC500 offers 2x Gigabit Ethernet Ports, 1x CAN Port, and 1x RS485 port, enabling seamless integration with major industrial communication networks.

What environmental ratings do WEG products have?

WEG products feature multiple environmental ratings and protection classes. They offer Protection Class 3C2 as a standard coating and Protection Class 3C3 as an optional extra coating, both compliant with IEC 60721-3-3. Environmental specifications include air relative humidity from 5% to 95% non-condensing, altitude ratings up to 1,000m standard (with current derating above that), and Pollution Degree 2 classification with non-conductive pollution requirements.

What accessories are available for WEG products?

WEG offers a comprehensive range of accessories across multiple product lines. For variable frequency drives like the CFW900, accessories include I/O expansion modules, communication modules, encoder modules, temperature transducer modules, relay output modules, and HMI accessories. These accessories expand communication capabilities, input/output functions, and application flexibility. Most accessories are interchangeable between drive frames and can be installed in backplane slots, with communication network accessories limited to one per variable speed drive.

What are the main product lines offered by WEG?

WEG offers a comprehensive range of industrial automation products, including variable frequency drives (CFW series like CFW100, CFW300, CFW500), soft starters (SSW series including SSW05, SSW07, SSW900), and the innovative Motion Fleet Management (MFM) system for predictive maintenance and asset monitoring. Their product lines are designed to support industrial automation needs across various sectors, providing solutions for motor control, fleet management, and operational efficiency.

How are WEG products typically installed?

WEG products are typically installed with careful attention to mounting specifications, protection ratings, and airflow requirements. For variable speed drives like the CFW900, installation methods include surface mounting, flange mounting, and side-by-side configurations with specific clearance guidelines. Installers must follow precise dimensional requirements for each product frame size, ensuring proper ventilation and electrical connections.