The Trane ICM450A 3-Phase Protection Module (part number 128491) is a versatile and reliable line voltage monitor designed to protect compressors and other critical HVAC components from harmful power conditions. It continuously monitors phase sequence, phase loss, undervoltage, and voltage imbalance to ensure safe and efficient system operation. Key Features Protects against phase loss, reversal, undervoltage, and voltage imbalance LED indicators provide quick system diagnostics Automatic reset feature after power restoration Compact and durable housing for easy integration into control panels OEM Trane part ensures compatibility and quality performance Specifications Model: ICM450A Part Number: 128491 Type: Line Voltage Monitor / Protection Module Application: 3-Phase Power Monitoring Reset Type: Automatic Indicators: LED status display Mounting: Panel mount Voltage Compatibility: 3-Phase systems (varies by unit) Compatible Models (General 3-phase commercial HVAC units; specific model compatibility should be verified with system specs) Why Choose This Item The Trane ICM450A is engineered for critical power protection, helping you avoid costly downtime and equipment damage due to electrical issues. With Trane's trusted OEM quality, intuitive diagnostics, and automatic protection logic, it?s the ideal solution for commercial HVAC system reliability and safety.