Multifunctional frequency converters of the SPLC-AT20-3R7G2 series are designed for connection to a single-phase network 220 V and control of three-phase asynchronous motors with a power up to 3.7 kW (depending on the chosen model of the frequency converter). These frequency converters are used to control conveyors, machine drives, and other loads where it is necessary to maintain torque over a wide range of engine speeds with low and infrequent overloads.
Frequency converters AT20-3R7G2 with a power of up to 3.7 kW use the scalar control mode V/f by default. However, they can also be switched to vector control mode.
Models of frequency converters AT20-3R7G2 have a protection degree of IP20, so it is recommended to install them on a DIN rail in specialised cabinets for protection against dust and moisture. A removable control panel, located on the front panel of the cabinet, simplifies settings.
Table — Main technical parameters of frequency converters SPLC-AT20-3R7G2
| Input voltage |
1ph 220 V
|
| Output voltage |
3ph 220 V
|
| Output power |
3.7 kW
|
| Output frequency range |
from 0 to 600.0 Hz
|
| Rated input current |
17 A
|
| Rated input current |
16.5 A
|
| Protection degree EN 60529 |
IP20 |
Functions of frequency converters SPLC-AT20:
- The specified output frequency can be a digital parameter, received in the form of an analogue current signal (or voltage), pulse. The design of the control inputs of the frequency converter allows you to select the type of input signal: NPN or PNP;
- Selection of the main frequency source of channel X and additional channel Y, calculation operations (addition, subtraction, maximum, minimum), and also switching between sources;
- Up to 15 digital frequency settings for time-based starting with a step from 0 to 6500 seconds or from 0 to 6500 hours (time unit is selected in the settings);
- Control of multiple pumps or fans in V/f mode;
- Choice of V/f control frequency characteristic: standard linear, multipoint, quadratic, or with coefficients 1.2, 1.4, 1.6, 1.8;
- Linear and S-shaped acceleration-braking characteristic;
- Automatic and manual torque boost of 0...30%;
- Stopping the motor by braking with direct current;
- Automatic voltage regulation (AVR);
- Sleep mode, activation during sleep for protecting the water supply system from freezing;
- JOG mode;
- User password request function for access to inverter menu
Delivery package
- Vector frequency converter series NIETZ AT20
- Removable control panel (installed on the frequency converter)
Advantages of SPLC-AT20-3R7G2
- AT20 series frequency converters have a high-performance processor and various functions that allow precise control of low power motors
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