SPLC-AT20-37G/45P4 three-phase frequency converters are powered by three-phase voltage 380 V and are designed to control three-phase asynchronous motors with a voltage of 380 V up to 37 kW.
The model of frequency converters from the series SPLC-AT20-37G/45P4 can switch to modes:
- Precise vector control with open loop (sensorless)
- Easy-to-configure scalar control involving adjustment of voltage/frequency. This control is less precise but allows enabling the "Pump" mode to work with more powerful motors — 45 kW.
Main parameters of SPLC-AT20-37G/45P4:
- Maximum output frequency up to 600 Hz, digital frequency setting resolution 0.01 Hz;
- Nominal supply voltage of the frequency inverter — 3ph ~380V 50/60 Hz;
- Overload capacity: operation for 60 s with a nominal current exceedance up to 150%, for 3 s — up to 180% (in “P” mode, overload of 120% is allowed for 60 s, 150% — no more than 3 s);
- PID control with feedback;
- Built-in controller (PLC);
- Remote control panel (LCD display, indicators, configurable buttons). By default, the detachable operator panel is installed on the device, for remote connection, a connector needs to be ordered and purchased additionally (not included in the frequency inverter price).
Main features of SPLC-AT20-37G/45P4:
- One can use a primary and auxiliary source of specified frequency, synthesize them, switch between sources in various ways. Frequency settings are possible through:
- Digital settings using buttons on the operator panel in the corresponding menu item;
- Digital setup with UP/DOWN terminals;
- Digital setup through RS-485 port;
- A potentiometer connected to the frequency inverter;
- Multi-step speed with 16 pre-set rotation frequencies lasting up to 6500.0 hours, acceleration/braking time for each step;
- Closed-loop PID control, with switchable PID parameters;
- Analog electrical signal;
- High-speed pulse signal.
- Retention of starting frequency up to 100.0 s;
- Function for forced motor stop by DC braking;
- Choice of acceleration/braking time and mode — linear or S-shaped curve;
- Sleep mode with activation periods to prevent water freezing;
- “Jog” mode;
- Protection functions:
- Password access protection in the menu;
- Protection of the electric motor, frequency converter from overload;
- Module overheat protection;
- Detection of phase disconnection at input/output;
- Detection of response time exceedance via RS-485;
- Overvoltage and undervoltage protection;
- Detection of sensor disconnection for PID feedback;
- Alarm for low and high water pressure, motor shutdown in the absence of water;
- Display of 25 error types on screen.
Here you can buy a vector frequency inverter Nietz for asynchronous motors with a power of up to 37 kW SPLC-AT20-37G/45P4 with a supply voltage of 3ph AC380V with delivery to any region of Ukraine.
Table — Main Technical Specifications of Frequency Inverters SPLC-AT20-37G/45P4
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 37 kW (45 kW in “P” mode)
|
| Output Frequency Range |
from 0 to 600 Hz
|
| Nominal Input Current |
76 A (90 A in “P” mode)
|
| Nominal Output Current |
75 A (90 A in “P” mode)
|
| Protection Rating EN 60529 |
IP20 |
SPLC-AT20-37G/45P4 Frequency Inverter Schematic
Control circuit of the frequency inverter:
- Input terminals: 6 digital multifunctional inputs and 2 analog (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);
- Communication port RS-485 (Modbus).
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