The SIEMENS 7UG0572-1FT21 is an Automatic Power Factor Correction (APFC) Relay designed to monitor and control reactive power in 50 Hz low-voltage electrical systems. Ideal for industrial and commercial applications, it ensures optimal power factor, reduces energy losses, and helps avoid penalty charges through efficient and intelligent capacitor bank switching. With built-in protection and user-friendly operation, it offers long-term reliability and maintenance-free performance.

Key Features:

Model: 7UG0572-1FT21
Function: Automatic Power Factor Correction (APFC) Relay
Voltage Range: Suitable for LV systems (typically 400/440V AC)
Frequency: 50 Hz
Display: LED/LCD for real-time monitoring
Control Steps: Supports multi-step capacitor bank control
Technology: Intelligent switching with adaptive control logic
Mounting: DIN rail mounting
Protection: Alarm function, system diagnostics, over/under compensation alerts
Design: Maintenance-free, compact & robust
Standards: Compliant with relevant IEC standards

Perfect for industrial & commercial power factor correction panels – improves energy efficiency, prevents power factor penalties, and ensures stable, automated reactive power management.