Siemens 3LF1200-2AD21 Disconnector Assembly

Description

Siemens 3LF1200-2AD21 Disconnector Assembly

Product Dimensions：

The Siemens 3LF1200-2AD21 is a high-performance Switch-Disconnector (also known as a Load Break Switch) belonging to the SENTRON family. It is specifically designed for low-voltage power distribution and industrial control systems, providing a reliable means to manually disconnect electrical circuits under load.

Product Detailed Description

The 3LF1200-2AD21 is a 3-pole switch disconnector rated for 200 A. It is engineered to meet stringent safety requirements, ensuring that downstream equipment is completely isolated from the power source during maintenance or in emergency situations. This model is typically used as a main switch, emergency-stop switch, or repair switch in industrial cabinets and distribution boards.

Technical Parameters

Product Advantages

• High Breaking Capacity: Capable of safely disconnecting circuits even under full load or moderate overload conditions, complying with AC-23A utilization categories.
• Compact Modular Design: Despite its high current rating, the unit is designed to occupy minimal space within a control cabinet.
• Enhanced Safety: Features clear “ON/OFF” position indicators and is lockable in the “OFF” position with multiple padlocks to ensure compliance with LOTO (Lock-Out Tag-Out) procedures.
• Durability: Built with high-quality silver-plated contacts to minimize heat dissipation and extend the electrical lifespan of the device.

Important Considerations (Precautions)

• Short-Circuit Protection: This device is a disconnector, not a circuit breaker. It must be used in conjunction with appropriate fuses or upstream circuit breakers to provide short-circuit protection.
• Terminal Torque: To prevent overheating or potential fire hazards, ensure all power cable connections are tightened to the manufacturer’s specified torque (N·m).
• Environment: Ensure the ambient temperature remains within the specified range (typically -25°C to +55°C). For higher temperatures, current derating may be required.
• Handle Alignment: If using a door-coupling rotary handle, ensure perfect alignment between the switch shaft and the handle to prevent mechanical binding.

Product Applications

The 3LF1200-2AD21 is utilized across various heavy-duty sectors:

• Industrial Manufacturing: As the main incoming power switch for machinery and production lines.
• Power Distribution: Installed in Main Distribution Boards (MDB) to isolate sub-sections of a plant for service.
• Renewable Energy: Used in solar combiner boxes or wind turbine control panels for safe isolation.
• HVAC Systems: Serving as a local disconnect switch for large commercial air handling units or chillers.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

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