WLS2F320 with ETU745 Trip Unit - 2000Amp Circuit Breaker

WLS2F320 with ETU745 Trip Unit - 2000Amp Circuit Breaker

If you’re maintaining or servicing an existing Siemens WL power distribution setup, the WLS2F320 with ETU745 trip unit is built to fit right in—no guesswork, no unnecessary modifications. This fixed-mounted S Class power circuit breaker is designed to match the form, fit, and function of original equipment, making it a practical choice when keeping your system running smoothly matters most. With a 2000A rating and 65kA interrupting capacity at 480VAC, it handles substantial electrical loads while providing dependable protection where it counts.

What really makes this unit stand out in day-to-day use is the ETU745 trip unit. It gives you precise control over long-time, short-time, instantaneous, and ground fault protection, so you can fine-tune your settings to match your system’s needs—not the other way around. Add in integrated temperature monitoring on key components, and you’ve got a breaker that not only protects but also helps you stay aware of operating conditions over time. When installed in the proper cubicle space, it’s also rated for continuous operation at 100%, which is essential in environments where downtime isn’t an option.

Key Features and Benefits

• Designed to match Siemens WL series systems for straightforward replacement
• ETU745 trip unit allows adjustable protection across multiple fault conditions
• Fixed-mounted design with integrated cubicle bus for consistent system fit
• Supports continuous operation at full 2000A rating when properly installed
• Built-in temperature sensors help monitor internal conditions
• 3-pole configuration for standard three-phase electrical systems
• Solid construction intended for long-term use in existing infrastructure

Technical Specifications

• Part Number: WLS2F320
  
• Frame Type: WL (S Class)
  
• Mounting Type: Fixed-Mounted, Integrated Cubicle Bus
  
• Poles: 3
  
• Amperage Rating: 2000A
  
• Interrupting Capacity: 65kA @ 480VAC
  
• Trip Unit: ETU745
  
• Protection Functions: Long Time, Short Time, Instantaneous, Ground Fault
  
• Rating Plug: 2000A Included
  
• Dimensions:
  • Height: 18.0 in
  • Width: 18.0 in
  • Depth: 16.0 in
• Minimum Cubicle Size for 100% Rated Operation:
  • 22" W x 22.5" H x 19.5" D

Material Compliance and Certifications

• Built to align with Siemens WL series manufacturing standards
• Meets applicable UL and ANSI requirements for low-voltage power circuit breakers (per original specifications)
• Includes factory-integrated thermal sensing components as outlined in Siemens WL documentation

Where It Works Best

• This breaker is a natural fit for facilities already using Siemens WL switchgear—think manufacturing plants, commercial buildings, hospitals, and large-scale infrastructure systems. It’s especially useful when you need to maintain compatibility with existing cubicles and bus systems without redesigning your setup. Whether you’re replacing a unit during scheduled maintenance or keeping critical systems online, the WLS2F320 provides the consistency and protection needed in established electrical environments.