Danfoss 131H3937 Frequency Inverter

Feature & Principle

It is Danfoss VLT FC302 high-performance universal vector inverter. It supports V/F, sensorless vector and closed-loop vector control, can drive induction motor and permanent magnet synchronous motor. It integrates STO safety torque off function, built-in A1/B class RFI filter. This version has no local operation panel, parameters can be set via bus or external keypad. Rich internal functions: PID, multi-speed, torque control, sleep mode, and comprehensive fault protection. Suitable for demanding variable torque and constant torque industrial loads.

Specifications

Model: 131H3937 Brand: Danfoss Series: VLT AutomationDrive FC302 Heavy duty power: 18.5kW, 37.5A Normal duty power: 22kW, 44A Input voltage: 3AC 380~500V Enclosure: IP20 Safety function: STO Communication: Modbus RTU onboard Cooling: Built-in fan Overload: 160% 60s heavy duty I/O: 4DI, 2AI, 1AO, 2 relay outputs Application: Extruder, conveyor, crane auxiliary drive, test equipment, process machinery Certification: CE, UL

Components & Diagnostics

IGBT power module, main control board, current and voltage detection circuit, cooling fan, DC bus capacitor, terminal block, status LED. Common faults: IGBT breakdown, capacitor aging bulging, fan failure, STO safety circuit alarm, Modbus communication interruption, overload trip.

Product Brief

131H3937 frequency inverter, Danfoss FC302 high-performance vector drive spare widely used for automation production line overhaul and replacement.