Littelfuse 201A-AU-OT Monitor
The Littelfuse 201A-AU-OT is a heavy-duty, 8-pin 3-phase plug-in voltage monitor engineered to protect motors from volatile line conditions. This auto-ranging motor protection relay operates seamlessly across 190-480 VAC, eliminating the need for manual range selection between 200V and 400V systems. As a micro-controller based unit, it provides precise sensing to mitigate phase loss, voltage unbalance, and phase reversal before damage occurs to the windings. Contractors will appreciate the adjustable trip delay (1-30s) and restart delay (manual or 1-500s), which allow for fine-tuning based on specific compressor or pump requirements. The unit features a Form C output relay rated for pilot duty 480VA at 240VAC, making it compatible with most industrial motor starters and contactors. Designed for efficiency, this monitor plugs directly into an OT08-PC octal socket for quick field replacement and reduced downtime.
Key Benefits for Contractors
- Universal Voltage Compatibility: The 190-480V auto-sensing capability reduces truck stock by replacing multiple fixed-voltage monitors.
- Advanced Diagnostics: A single LED provides five distinct flash patterns to quickly identify over-voltage, under-voltage, or unbalance faults without a multimeter.
- Precision Accuracy: Features +/- 1% trip accuracy, ensuring the motor shuts down exactly at the programmed 2-8% unbalance threshold.
- Rugged Temperature Rating: Built to withstand mechanical room extremes with an operating range of -40°C to 70°C.
- Simplified Installation: Compact 8-pin plug-in design allows for surface or DIN-rail mounting using standard octal bases.
Common Questions
Does the 201A-AU-OT require a specific socket for installation?
Yes, this unit is designed to be paired with a standard 8-pin octal socket, such as the Littelfuse OT08-PC, which supports both DIN-rail and surface mounting.
Can this monitor be used on both 50Hz and 60Hz systems?
This microcontroller-based monitor is compatible with both 50/60 Hz frequencies, making it suitable for a wide range of global industrial applications.
How does the automatic restart function work?
The adjustable restart delay can be set to provide a window for head pressure to bleed off in HVACR compressors or set to manual mode if a hard lockout is required for safety inspections after a fault.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Littelfuse 201A-AU-OT Monitor
The Littelfuse 201A-AU-OT is a heavy-duty, 8-pin 3-phase plug-in voltage monitor engineered to protect motors from volatile line conditions. This auto-ranging motor protection relay operates seamlessly across 190-480 VAC, eliminating the need for manual range selection between 200V and 400V systems. As a micro-controller based unit, it provides precise sensing to mitigate phase loss, voltage unbalance, and phase reversal before damage occurs to the windings. Contractors will appreciate the adjustable trip delay (1-30s) and restart delay (manual or 1-500s), which allow for fine-tuning based on specific compressor or pump requirements. The unit features a Form C output relay rated for pilot duty 480VA at 240VAC, making it compatible with most industrial motor starters and contactors. Designed for efficiency, this monitor plugs directly into an OT08-PC octal socket for quick field replacement and reduced downtime.
Key Benefits for Contractors
- Universal Voltage Compatibility: The 190-480V auto-sensing capability reduces truck stock by replacing multiple fixed-voltage monitors.
- Advanced Diagnostics: A single LED provides five distinct flash patterns to quickly identify over-voltage, under-voltage, or unbalance faults without a multimeter.
- Precision Accuracy: Features +/- 1% trip accuracy, ensuring the motor shuts down exactly at the programmed 2-8% unbalance threshold.
- Rugged Temperature Rating: Built to withstand mechanical room extremes with an operating range of -40°C to 70°C.
- Simplified Installation: Compact 8-pin plug-in design allows for surface or DIN-rail mounting using standard octal bases.
Common Questions
Does the 201A-AU-OT require a specific socket for installation?
Yes, this unit is designed to be paired with a standard 8-pin octal socket, such as the Littelfuse OT08-PC, which supports both DIN-rail and surface mounting.
Can this monitor be used on both 50Hz and 60Hz systems?
This microcontroller-based monitor is compatible with both 50/60 Hz frequencies, making it suitable for a wide range of global industrial applications.
How does the automatic restart function work?
The adjustable restart delay can be set to provide a window for head pressure to bleed off in HVACR compressors or set to manual mode if a hard lockout is required for safety inspections after a fault.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Littelfuse 201A-AU-OT is a heavy-duty, 8-pin 3-phase plug-in voltage monitor engineered to protect motors from volatile line conditions. This auto-ranging motor protection relay operates seamlessly across 190-480 VAC, eliminating the need for manual range selection between 200V and 400V systems. As a micro-controller based unit, it provides precise sensing to mitigate phase loss, voltage unbalance, and phase reversal before damage occurs to the windings. Contractors will appreciate the adjustable trip delay (1-30s) and restart delay (manual or 1-500s), which allow for fine-tuning based on specific compressor or pump requirements. The unit features a Form C output relay rated for pilot duty 480VA at 240VAC, making it compatible with most industrial motor starters and contactors. Designed for efficiency, this monitor plugs directly into an OT08-PC octal socket for quick field replacement and reduced downtime.
Key Benefits for Contractors
- Universal Voltage Compatibility: The 190-480V auto-sensing capability reduces truck stock by replacing multiple fixed-voltage monitors.
- Advanced Diagnostics: A single LED provides five distinct flash patterns to quickly identify over-voltage, under-voltage, or unbalance faults without a multimeter.
- Precision Accuracy: Features +/- 1% trip accuracy, ensuring the motor shuts down exactly at the programmed 2-8% unbalance threshold.
- Rugged Temperature Rating: Built to withstand mechanical room extremes with an operating range of -40°C to 70°C.
- Simplified Installation: Compact 8-pin plug-in design allows for surface or DIN-rail mounting using standard octal bases.
Common Questions
Does the 201A-AU-OT require a specific socket for installation?
Yes, this unit is designed to be paired with a standard 8-pin octal socket, such as the Littelfuse OT08-PC, which supports both DIN-rail and surface mounting.
Can this monitor be used on both 50Hz and 60Hz systems?
This microcontroller-based monitor is compatible with both 50/60 Hz frequencies, making it suitable for a wide range of global industrial applications.
How does the automatic restart function work?
The adjustable restart delay can be set to provide a window for head pressure to bleed off in HVACR compressors or set to manual mode if a hard lockout is required for safety inspections after a fault.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
