Three-phase frequency converters SPLC-AT20-18.5G/22P4 are powered by three-phase voltage 380 V and are designed for controlling three-phase asynchronous motors with a voltage of 380 V and a power of up to 18.5 kW.
The frequency converters of the SPLC-AT20-18.5G/22P4 series can switch modes:
- Precise open-loop vector control (without sensors)
- Easy-to-set scalar control, which involves adjusting the voltage/frequency. This control is less precise but allows the "Pump" mode to operate with higher power motors — 22 kW.
Main parameters of SPLC-AT20-18.5G/22P4:
- Maximum output frequency up to 600 Hz, resolution for digital frequency setting 0.01 Hz;
- Rated power supply of the frequency converter — 3ph ~380V 50/60 Hz;
- Overload capability: operation period 60 s with an excess of the rated current up to 150%, for 3 s — up to 180% (in "R" mode, overload 120% is allowed for 60 s, 150% — no more than 3 s);
- PID control with feedback;
- Internal controller (PLC);
- Remote control panel (LCD display, indicators, customizable keys). By default, the removable operator panel is installed on the device, for remote connection you need to additionally order and purchase a connector (not included in the frequency converter price).
Main features of SPLC-AT20-18.5G/22P4:
- It is possible to use both a primary and auxiliary frequency source, their synthesis, switch between sources in various ways. Frequency settings are possible through:
- Digital setup using the keys on the operator panel in the relevant menu item;
- Digital setup via terminals UP/DOWN;
- Digital setting via RS-485 port RS-485;
- Potentiometer connected to the frequency converter;
- Multistage speed with 16 preset rotation frequency settings lasting up to 6500.0 h, acceleration/braking time for each step;
- Closed-loop PID control, with switchable PID parameters;
- Analogue electrical signal;
- High-speed pulse signal.
- Maintaining the starting frequency up to 100.0 s;
- Function of forced motor stopping with DC braking;
- Choice of acceleration/deceleration time and mode — linear or S-curve;
- Sleep mode with activation periods to prevent water freezing;
- "Jog" mode;
- Protection functions:
- Password-protected menu access;
- Protection of motor, frequency converter from overload;
- Module overheat protection;
- Detection of phase break at input/output;
- Detection of response time exceedance via RS-485;
- Overvoltage and undervoltage protection;
- Detection of feedback sensor break for PID;
- Low and high water pressure alerts, motor stopping in case of water shortage;
- Display of 25 error types on the display.
With us, you can buy the Nietz vector frequency inverter for asynchronous motors with power up to 18.5 kW SPLC-AT20-18.5G/22P4 with supply voltage 3ph AC380V with delivery to any region of Ukraine.
Table — Main technical parameters of frequency converters SPLC-AT20-7R5G4
| Input voltage |
3ph 380 V
|
| Output voltage |
3ph 380 V
|
| Output power |
up to 18.5 kW (22 kW in "P" mode)
|
| Output frequency range |
from 0 to 600 Hz
|
| Rated input current |
38 A (46 A in "P" mode)
|
| Rated output current |
37 A (45 A in "P" mode)
|
| Protection class EN 60529 |
IP20 |
SPLC-AT20-18.5G/22P4 Frequency Converter Scheme
Control Circuit of the Frequency Converter:
- Input terminals: 6 multifunctional digital inputs and 2 analog inputs (one 0…20 mA or 0…10 V, the other only 0…10 V);
- Output terminals: 2 relay outputs, 1 high-speed pulse output (open collector transistor), 2 analog outputs (0…20 mA or 0…10 V);
- RS-485 Communication Port (Modbus).
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