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.

·7.5~37kW
·380V
·IP rating: IP20
  • GD350-01-FT Series Single-VFD Integrated System for Air Compressor
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  • GD350-01-FT Series Single-VFD Integrated System for Air Compressor
Overview
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Specifications
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Features

Stable and reliable
Features a low-harmonic control algorithm to reduce motor temperature rise and extend motor service life.
Control loop bandwidth increased by 10×, with enhanced grid/load fluctuation adaptability for more stable operation.
Cooling fans with IP56 vacuum-coated design, significantly reducing fan failure rate and improving system reliability.
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Easy to use, with simplified commissioning
Loop-free commissioning with parameter self-adaptation; simple setup without the need to configure numerous parameters.
Supports one-click parameter copy, suitable for streamlined batch commissioning (optional keypad with parameter copy function, model 11022-00064), improving commissioning efficiency and lowering labor costs.
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Integrated design for reduced system cost
Specialized all-in-one design integrating the motor and fan control, with specialized interfaces for PT100 and pressure sensors, reducing the electrical system cost by 10% compared with traditional solutions.
Pluggable terminals for convenient harness pre-assembly, improving assembly efficiency and reducing wiring cost.
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Specifications

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.

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