- 5-Step Speed Control: Step0=0Hz; Step1=10Hz; Step2=20Hz; Step3=30Hz; Step4=40Hz; Step5=50Hz, for precise fan speed management.
- Integrated Sine Filter: All-pole effective filter allows existing non-shielded cables to be used, reducing installation complexity.
- Motor Protection: Connect thermostats (TB) or thermistors (TP) for reliable and safe operation of external rotor and other sensitive motors.
- Durable & Flexible: IP54-rated enclosure with wide voltage range (208–480V, 50/60Hz) suitable for retrofit installations and parallel motor operation.
- Interference-Compliant & Silent: Meets EN 61000-6-2/6-3 standards, ensures operation without electromagnetic motor noise, voltage peaks, or bearing current issues.
The FRQ5S-4A+LED V2 is a reliable 3-phase fan speed controller designed for both new and retrofit installations. Featuring a 5-step switch (0-50Hz) and integrated all-pole sine filter, this unit allows the use of existing non-shielded cables while ensuring smooth, trouble-free motor operation. Ideal for controlling external rotor motors and other motors typically unsuitable for frequency inverters, it offers motor protection through thermostat or thermistor connections, interference immunity, and parallel operation capability. With a wide voltage range of 208–480V, IP54 enclosure, and compact, durable construction, the FRQ5S-4A+LED V2 delivers efficient, silent performance in demanding applications.
