Littelfuse 202-RP Relay
The Littelfuse 202-RP Relay is a high-performance 3-phase voltage monitor engineered for precision phase-sensing in demanding industrial and HVACR environments. Designed to protect scroll compressors, fan motors, and conveyor systems, this reverse-phase relay specifically monitors phase rotation to prevent equipment damage caused by improper lead sequences. It features an auto-ranging dual-voltage capability, automatically sensing system configurations between 190V and 480V AC at 50/60Hz. Utilizing microcontroller-based circuitry, the 202-RP constantly evaluates the power line, deactivating the output relay upon detection of a phase reversal fault. The unit includes advanced LED diagnostics with five distinct light patterns to streamline troubleshooting for field technicians. With its compact footprint and single-screw mounting, this MotorSaver protection relay ensures rapid installation into control panels while maintaining high-level transient protection to meet IEC 61000-4-5 standards.
Key Benefits
- Microcontroller Precision: Constant 3-phase monitoring ensures immediate response to harmful reverse-phase conditions.
- Universal Voltage Compatibility: Auto-sensing range from 190V to 480V eliminates the need for multiple stocked parts.
- Simplified Diagnostics: Integrated LED provides clear visual indicators for normal operation, restart delays, and fault conditions.
- Robust Construction: Operates in extreme temperatures ranging from -40° to 158°F (-40° to 70°C).
- Efficient Form Factor: Small footprint and 0.25-inch male quick-connect terminals allow for fast integration into tight panels.
Common Questions
Will the 202-RP trip on under-voltage or over-voltage?
The 202-RP model is specifically designed to trip on reverse-phase only. While it monitors the system, its primary logic is dedicated to protecting against incorrect rotation in 3-phase systems.
How do I confirm the unit has detected the correct phase rotation?
The status light will turn solid green once the relay is activated, indicating the phase rotation is correct and the system is safe to operate.
Can this relay be used on both 50Hz and 60Hz systems?
Yes, it is compatible with both frequencies. Note that operating on a 50Hz system will increase the internal delay timers by approximately 20%.
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 202-RP Relay
The Littelfuse 202-RP Relay is a high-performance 3-phase voltage monitor engineered for precision phase-sensing in demanding industrial and HVACR environments. Designed to protect scroll compressors, fan motors, and conveyor systems, this reverse-phase relay specifically monitors phase rotation to prevent equipment damage caused by improper lead sequences. It features an auto-ranging dual-voltage capability, automatically sensing system configurations between 190V and 480V AC at 50/60Hz. Utilizing microcontroller-based circuitry, the 202-RP constantly evaluates the power line, deactivating the output relay upon detection of a phase reversal fault. The unit includes advanced LED diagnostics with five distinct light patterns to streamline troubleshooting for field technicians. With its compact footprint and single-screw mounting, this MotorSaver protection relay ensures rapid installation into control panels while maintaining high-level transient protection to meet IEC 61000-4-5 standards.
Key Benefits
- Microcontroller Precision: Constant 3-phase monitoring ensures immediate response to harmful reverse-phase conditions.
- Universal Voltage Compatibility: Auto-sensing range from 190V to 480V eliminates the need for multiple stocked parts.
- Simplified Diagnostics: Integrated LED provides clear visual indicators for normal operation, restart delays, and fault conditions.
- Robust Construction: Operates in extreme temperatures ranging from -40° to 158°F (-40° to 70°C).
- Efficient Form Factor: Small footprint and 0.25-inch male quick-connect terminals allow for fast integration into tight panels.
Common Questions
Will the 202-RP trip on under-voltage or over-voltage?
The 202-RP model is specifically designed to trip on reverse-phase only. While it monitors the system, its primary logic is dedicated to protecting against incorrect rotation in 3-phase systems.
How do I confirm the unit has detected the correct phase rotation?
The status light will turn solid green once the relay is activated, indicating the phase rotation is correct and the system is safe to operate.
Can this relay be used on both 50Hz and 60Hz systems?
Yes, it is compatible with both frequencies. Note that operating on a 50Hz system will increase the internal delay timers by approximately 20%.
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 202-RP Relay is a high-performance 3-phase voltage monitor engineered for precision phase-sensing in demanding industrial and HVACR environments. Designed to protect scroll compressors, fan motors, and conveyor systems, this reverse-phase relay specifically monitors phase rotation to prevent equipment damage caused by improper lead sequences. It features an auto-ranging dual-voltage capability, automatically sensing system configurations between 190V and 480V AC at 50/60Hz. Utilizing microcontroller-based circuitry, the 202-RP constantly evaluates the power line, deactivating the output relay upon detection of a phase reversal fault. The unit includes advanced LED diagnostics with five distinct light patterns to streamline troubleshooting for field technicians. With its compact footprint and single-screw mounting, this MotorSaver protection relay ensures rapid installation into control panels while maintaining high-level transient protection to meet IEC 61000-4-5 standards.
Key Benefits
- Microcontroller Precision: Constant 3-phase monitoring ensures immediate response to harmful reverse-phase conditions.
- Universal Voltage Compatibility: Auto-sensing range from 190V to 480V eliminates the need for multiple stocked parts.
- Simplified Diagnostics: Integrated LED provides clear visual indicators for normal operation, restart delays, and fault conditions.
- Robust Construction: Operates in extreme temperatures ranging from -40° to 158°F (-40° to 70°C).
- Efficient Form Factor: Small footprint and 0.25-inch male quick-connect terminals allow for fast integration into tight panels.
Common Questions
Will the 202-RP trip on under-voltage or over-voltage?
The 202-RP model is specifically designed to trip on reverse-phase only. While it monitors the system, its primary logic is dedicated to protecting against incorrect rotation in 3-phase systems.
How do I confirm the unit has detected the correct phase rotation?
The status light will turn solid green once the relay is activated, indicating the phase rotation is correct and the system is safe to operate.
Can this relay be used on both 50Hz and 60Hz systems?
Yes, it is compatible with both frequencies. Note that operating on a 50Hz system will increase the internal delay timers by approximately 20%.
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.
