1.2 All the components of FIT series Frequency Inverter
According to voltage class and power level, FIT series Frequency Inverter can be generally classified into two structure types, namely, plastic structure and sheet metal structure.
The outline drawing of plastic structure of FIT series Frequency Inverter
The outline drawing of sheet metal structure of FIT series Frequency Inverter
According to voltage class and power level, FIT enclosure structure types are listed as the following table:
Voltage & Power Clas
|0.4kW ～2.2kW||Plastic housing|
|0.75kW ～15kW||Plastic housing|
|18.5kW ～315kW||Sheet metal housing|
1.3 Basic technical specification
|Vector contro: 0～300Hz; V/F control: 0～3200Hz|
The carrier frequency is automatically adjusted based on the load features.
|Digital setting: 0.01Hz|
Analog setting: maximum frequency x 0.025%
• Sensorless flux vector control (SFVC)
• Closed-loop vector control (CLVC)
• Voltage/Frequency (V/F) control
• G type: 0.5 Hz/150% (SFVC); 0 Hz/180% (CLVC)
• P type: 0.5 Hz/100%
± 0.5% (SFVC)
± 0.02% (CLVC)
Torque control accuracy
± 5% (CLVC)
|• G type: 60s for 150% of the rated current, 3s for 180% of the rated current|
• P type: 60s for 120% of the rated current, 3s for 150% of the rated current
• Fixed boost
• Customized boost 0.1%–30.0%
• Straight-line V/F curve
• Multi-point V/F curve
• N-power V/F curve (1.2-power, 1.4-power, 1.6-power,
Two types: complete separation; half separation
• Straight-line ramp
• S-curve ramp
Four groups of acceleration/deceleration time with the range of 0.0–6500.0s
|DC braking frequency: 0.00Hz~maximum frequency|
Braking time: 0.0s~36.0s
Braking action current value: 0.0%–100.0%
JOG frequency range: 0.00–50.00 Hz
JOG acceleration/deceleration time: 0.0–6500.0s
Simple PLC and
It implements up to 16 speeds via the simple PLC function or combination of DI terminal states.
It realizes process-controlled closed loop control system easily.
It can keep constant output voltage automatically when the mains
Overvoltage/ Overcurrent stall
The current and voltage are limited automatically during the running process so as to avoid frequent tripping due to
Quick current limiting
Maximize overcurrent failure and protect the Frequency Inverter in normal operation
Torque limit and control
It can limit the torque automatically and prevent frequent over current tripping during the running process.
Torque control can be implemented in the CLVC mode.
|Control of asynchronous motor and synchronous motor are implemented through the high-performance current vector control technology.|
Power dip ride through
The load feedback energy compensates the voltage reduction so that the AC drive can continue to run for a short time.
Rapid current limit
It helps to avoid frequent overcurrent faults of the AC drive.
Time range: 0.0–6500.0 minutes
Four motors can be switched over via four groups of motor
Support field bus: Modbus
Motor overheat protection
The optional I/O extension card enables AI3 to receive the motor temperature sensor input (PT100, PT1000) so as to realize motor overheat protection
Multiple encoder types
Support difference, open collector and rotary transformer
Operation panel, control terminal and serial communication port are given Switch in various methods
Various frequency sources: digital reference, analog voltage reference, analog current reference, pulse reference and serial port reference. The switching can be conducted in various methods
10 kinds of auxiliary frequency source. The auxiliary frequency jog
and frequency synthesis can be achieved flexibly
7 digital input terminals, among which one support maximum high-speed pulse input of 100kHz
2 analog input terminals, among which one only supports voltage input of 0 ～10V and the other supports voltage input of 0 ～10V or current input of 4 ～20mA
3 digital input terminals
1 analog input terminal, which supports voltage input of -10V ～
10V and supports PT100/PT1000
1 high-speed pulse output terminal (The open collector type is optional), supporting 0~100kHz square signal output
1 digital output terminal
1 relay output terminal
1 analog output terminal, supporting current outpout of 0~20mA or voltage output of 0~10V
1 digital output terminal
1 relay output terminal
1 analog output terminal, supporting current output of 0~20mA or voltage output of 0~10V
Display and keyboard operation
Display the parameter
Key lock and function selection
Realize partial or all key lock and define the action range of some keys to prevent misoperation
Short circuit test of electrified motor, input/output default phase protection, overcurrent protection, overvoltage protection, undervoltage protection, overheat protection, overload protection, etc
IO expansion card, differential input PG card, OC input PG card
and rotary transformer PG card.
Indoor, free from direct sunshine, no dust, corrosive gas,
combustible gas, oil fog, water vapor, drip or salt, etc.
Less than 1,000m
－10℃~ ＋40℃ (Please use the equipment by derating at ambient temperature of 40℃~50 ℃)
Less than 95%RH, no water condensation
Less than 5.9m/s2(0.6g)
Power distribution system
TN , TT
1.4 Wiring mode of control loop of Frequency Inverter
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