GD20-09 Series VFD for Crane

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GD20-09 series VFD for crane is an open-loop vector control VFD that INVT develops for cranes based on the load characteristics and control requirements of electric hoists, European-style cranes, and small-tonnage gantry or bridge cranes. Compliant with crane industry standards, integrated with crane-specific functions, and compact structured, the VFD achieves excellent performance, carries the built-in braking unit for the entire series, adopts the overall EMC design, and passes rigorous reliability testing, meeting the environment requirements on low noise and low EMI in the application sites, and greatly improving product reliability.

Power range: AC 380V (-15%)–440V (+10%) 0.75–37kW

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Description

• Built-in braking unit configured for the entire series

* Dedicated terminal design, diverse choices

* Special-purpose braking logic:
– Special-purpose braking logic: Integrates with torque verification to achieve safe run without slip after torque establishment;
– supports starting direction selection and brake selection in FWD/REV switchover to meet various starting requirements flexibly.

* Application macros:
Integrates a variety of crane application macros and supports user-defined macros, which are easy to commission and use.

* Conical rotor motor control:
  Helps adjust the magnetic flux based on the characteristics of conical rotor motor to realize fast brake release and closing control, simplify the commissioning steps, and ensure equipment safety.

Specifications

Description Specifications
Power input Input voltage (V) AC 3PH 380V (-15%)–440V(+10%); Rated voltage: 380V
Input current (A) For details, see “Product ratings”.
Input frequency (Hz) 50Hz or 60Hz; Allowed range: 47–63Hz
Power output Output voltage (V) 0–Input voltage (V)
Output current (A) For details, see “Product ratings”.
Output power (kW) For details, see “Product ratings”.
Output frequency (Hz) 0–150Hz
Technical control performance Control mode Space voltage vector control, and sensorless vector control   (SVC)
Motor type Asynchronous motor (AM)
Speed ratio For AMs: 1: 200 (SVC)
Speed control accuracy ± 0.2% (SVC)
Speed fluctuation ± 0.3% (SVC)
Torque response < 20ms (SVC)
Torque control accuracy 10% (SVC)
Starting torque For AMs: 0.25Hz/150% (SVC)
Overload capacity Compliant with the load requirements of duty type S3
Braking capability 100% for long time, 120% for 1 minute, and 170% for 10 seconds  
Running control performance Frequency setting method Settings can be implemented through digital, analog,   multi-step speed running, Modbus communication and so on. Settings can be   combined and the setting channels can be switched.
Automatic voltage regulation The output voltage can be kept constant although the grid   voltage changes.
Fault protection More than 30 protection functions, such as protection against   overcurrent, overvoltage, undervoltage, overtemperature, phase loss,   underload, and overload
Peripheral interface Terminal analog input resolution No more than 20mV
Terminal digital input resolution No more than 2ms
Analog input One input; AI2: 0–10V/0–20mA
For 5.5kW and higher models: Compatible with PT100 input. Whether the input   type is AI or PT100 is set through the DIP switch. 
Digital input Eight regular inputs, two of which support PTC input, while   PTC acts at 2.5kΩ
Internal impedance: 6.6kΩ
Max. input frequency: 1kHz
Supporting internal power 24V
Supporting the voltage input of external power (-20%)24–48VDC(+10%) and   (-10%)24–48VAC(+10%)
Bidirectional input terminals, simultaneously supporting NPN and PNP   connection methods
Relay output Three programmable relay outputs
RO1A: NO; RO1B: NC; RO1C: common
RO2A: NO; RO2C: common
RO3A: NO; RO3C: common
Contact capacity: 3A/AC 250V, 1A/DC 30V
Other Temperature of running environment -10°C–+50°C. Derating is   required when the temperature exceeds 40°C.
IP rating IP20
Pollution degree Degree 2
Cooling method Forced air cooling
Braking unit Already built in the entire series
Altitude Below 1000m. Derating is required when the altitude exceeds   1000m. Derate by 1% for each increase of 100m above 1000m.
DC reactor The VFD models of 18.5kW and higher are equipped with built-in   DC reactors.
EMC filter The VFD models of 3PH 380V 5.5kW and higher can meet   IEC61800-3 C3 requirements by connecting the jumper J10; the other VFD models   can meet IEC61800-3 C3 requirements after being configured with optional   external filters.


The entire series can meet IEC61800-3 C2 requirements after being configured   with optional external filters.

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