Technical Parameters (HTD31-4T0150E) Model: HTD31-4T0150E Series: HTD31 Hoist and Crane Drive Product Type: AC Variable Frequency Drive for Hoisting Applications Rated Power: 15 kW (20 HP) Input Phase: Three-phase Input Voltage: 380V to 480V AC ±10% Input Frequency: 50/60 Hz ±5% Output Voltage: 3-phase, 0 to rated input voltage (variable frequency) Rated Output Current: 32 A (typical at 380V) Output Frequency: 0 to 400 Hz (standard) Control Mode: Sensorless Vector Control (optimized for hoisting) Starting Torque: 180% at 0.5Hz Overload Capacity: 150% for 60 seconds; 180% for 10 seconds (hoist duty cycle) Carrier Frequency: 2 kHz to 8 kHz (adjustable, derating applies at higher frequencies) Frequency Setting Resolution: 0.01 Hz Speed Control Accuracy: ±0.5% (sensorless vector) Speed Control Range: 1:100 Hoist-Specific Functions: Pre-magnetizing before brake release Load torque observation and monitoring Slip compensation Brake control logic (integrated) Upper/lower limit switch inputs Emergency stop function Slack rope detection Overload protection Digital I/O: 8 x programmable digital inputs, 4 x programmable digital outputs (including dedicated brake control) Analog I/O: 2 x analog inputs (0-10V, 4-20mA selectable), 2 x analog outputs (0-10V, 4-20mA selectable) Communication: Standard RS485 with MODBUS RTU protocol Braking: Built-in dynamic braking unit (integrated) Protection Class: IP20 (requires enclosure for installation) Operating Temperature: -10°C to +40°C (derating above 40°C to max 50°C) Storage Temperature: -20°C to +60°C Humidity: <95% RH (non-condensing) Altitude: Up to 1000m without derating (derating above 1000m) Cooling Method: Forced air cooling (high-capacity fan) Dimensions (H x W x D): Approx. 350 mm x 250 mm x 200 mm (13.8" x 9.8" x 7.9") - typical Weight: Approx. 12 kg (26.5 lbs) Standards: CE, UL (pending), ISO9001, compliant with crane and hoist safety standards