Category | Item | Specifications |
Power input | Input voltage (V) | 1PH 220V (-15%)–240V (+10%) 3PH 380V (-15%)–440V (+10%) |
Rated input frequency (Hz) | 50Hz or 60Hz; allowed range: 47–63Hz | |
Power output | Output voltage (V) | Equal to the input voltage, with the error <5% |
Output frequency (Hz) | 0–400Hz | |
Power–frequency fan output (single-VFD integrated system) | Output voltage (V) | Equal to the input voltage, with the error <1% |
Output frequency (Hz) | Equal to the input frequency, with the error <1% | |
Power supply output | 24VDC | 24W (or 12W) |
220VAC | The AC 220V VFD draws its supply directly from the input. For the AC 380V VFD, the 220V supply is provided by a power-frequency transformer (rated power: 15W). | |
Running control performance | Control mode | Open-loop vector, space voltage vector |
Speed ratio | Asynchronous motors (AMs): 1:200 (SVC); synchronous motors (SMs): 1:20 (SVC) | |
Speed control accuracy | ±0.2% (SVC) | |
Speed fluctuation | ±0.3% (SVC) | |
Torque response | <20ms (SVC) | |
Starting torque | For AMs: 0.25Hz 150% (SVC) For SMs: 2.5Hz 150% (SVC) | |
Frequency reference mode | PID control, Modbus communication, P1 analog input, and keypad digital | |
Overload capacity | AC 220V VFD: Overload not supported. AC 380V VFD: Supports long-term running at 120% of the rated current. | |
Pressure analog input | One input (4–20mA/2–10V) corresponds to 0–1.6MPa | |
Temperature analog input | Two PT100 temperature analog inputs; resolution: 1°C Temperature range: -40°C–+200°C; accuracy: ±3°C | |
Digital input | Three regular digital inputs; max. frequency: 1kHz One PTC digital input (using the same terminals as DI3) | |
Digital output | One regular digital output; max. frequency: 1kHz | |
Relay output | One solenoid valve output | |
Fault protection | More than 30 protection functions, such as protection against overcurrent, overvoltage, undervoltage, overtemperature, phase loss, overload, and fan current imbalance. | |
Fan protection | Overload protection: 120% overload for 60 seconds, 130% for 48 seconds, 150% for 24 seconds, 160% for 8 seconds, 200% for 5 seconds, and 300% for 1 second. | |
| Current imbalance protection: If the current difference between any two phases is 60% to 75%, a fault shutdown will be triggered within 5 seconds. | ||
| Output short-circuit protection: The protection can be implemented by using the internal fuse. | ||
| Output short-to-ground protection: The protection can be implemented by using the internal fuse. | ||
Solenoid valve port protection | 220V output short-circuit protection | |
RS485 communication | One RS485 communication interface | |
Other | Mounting method | Wall mounting, flange mounting |
Temperature of running environment | -10°C–+50°C Derating is required when the ambient temperature exceeds 40°C. Derate by 1% for each increase of 1°C. | |
Ingress protection (IP) rating | IP20 | |
Pollution degree | Degree 2 | |
Cooling method | Forced air cooling | |
EMC filter | Optional external filters can be used to meet the IEC61800-3 C2 requirements. |
GD350-01-FT Series Single-VFD Integrated System for Air Compressor
The GD350-01-FT series single-VFD integrated system is a dedicated Variable Frequency Drive (VFD) for air compressors developed on the basis of the GD300-01A-RT series, incorporating the new-generation control platform for further breakthroughs in performance and functionality. Designed for both synchronous and asynchronous air compressors, it has undergone extensive compatibility testing with multiple mainstream motor and compressor manufacturers in the industry. With dedicated PID control and a unique flux-weakening design, it enables fast startup, stable operation, and easier commissioning. Featuring an independent air duct and a heavy-duty design, it can effectively handle harsh site conditions and challenging grid environments.
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