High-performance vector frequency converters of the SPLC-NZ8400-45G/55P series are designed to control high-load three-phase motors 380 V with power up to 45 kW, where overloads may occur and higher requirements are set for control quality. These frequency converters have a higher processor performance than the SPLC-АТ20 series, allowing SPLC-NZ8000 to perform operations faster and thus provide sensorless vector control of rotation speed with an accuracy of ±0.5%. If necessary, the converter can switch to a simple scalar control mode U/f with less accuracy and a "Pump" mode for more powerful motors with less load (details below).
Additionally, a PG board can be installed in the SPLC-NZ8000 converter (purchased separately). With it, a sensor-encoder can be connected to the converter to track motor speed and rotor position. Vector control with feedback provides increased responsiveness and frequency control accuracy up to ±0.02%, allowing torque control accuracy up to ±5% and operation not only with asynchronous but also synchronous motors.
Table — Main technical parameters of the SPLC-NZ8400-45G/55P frequency converters
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 45 kW (55 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Rated Input Current |
90 A (105 A in "Pump" mode)
|
| Rated Output Current |
90 A (110 A in "Pump" mode)
|
| Protection Level EN 60529 |
IP20 |
When installing the frequency converter in a protective cabinet, its control panel (operator panel) can be detached and moved to the front panel. A connector cable is needed for this.
Technical Specifications of the SPLC-NZ8000 Series
Standard Functions of the SPLC-NZ8000 Frequency Converter
| Control Modes |
Sensorless Vector Control (SFVC)
Closed-loop Vector Control (CLVC, with PG)
V/F Control |
| Maximum Output Frequency |
Vector Control: 0-320 Hz
V/F Control: 0-3200 Hz
|
| Carrier Frequency |
1-16 kHz
The carrier frequency is automatically adjusted depending on the load characteristics. |
| Frequency Setting Resolution |
Digital Setting: 0.01 Hz
Analogue Setting: maximum frequency × 0.025% |
| Starting Torque |
Type G: 0.5 Hz/150% (SFVC); 0 Hz/180% (CLVC, with PG)
Type: 0.5 Hz/100% |
| Speed Range |
1:100 (SFVC)
1:1000 (CLVC)
|
| Speed Accuracy |
±0.5% (SFVC), ± 0.02% (CLVC, with PG)
|
| Torque Control Accuracy |
±5% (CLVC, with PG) |
| Overload Capacity |
G type: 60 seconds at 150% of rated current, 3 seconds at 180% of rated current
P type: 60 seconds at 120% of rated current, 3 seconds at 150% of rated current |
| Torque Boost |
Automatic boost
Manual boost 0.1%-30.0%
|
| V/F Curve |
Linear V/F curve
Multi-point V/F curve
Step V/F curve (1.2, 1.4, 1.6, 1.8, quadratic) |
| V/F Separation |
Two types: full separation, partial separation |
| Acceleration/Deceleration Mode |
Linear curve
S-curve
Four groups of acceleration/deceleration time span 0.0-6500.0 seconds
|
| DC Braking |
DC braking frequency: from 0.00 Hz to maximum frequency
Braking time: 0.0-100.0 seconds
Selection of braking current action: 0.0% -100.0%
|
| JOG Control |
JOG frequency range: 0.00-50.00 Hz
JOG acceleration/deceleration time: 0.0-6500.0 seconds
|
| Built-in Multi-speed Settings |
Implementation of up to 16 speeds through the simple PLC function or terminal state combination |
| Built-in PID |
Enables PID regulation of the closed-loop system |
| Voltage Autotuning |
Can provide constant output voltage when the main voltage changes. |
| Overcurrent and Overvoltage Control |
Automatically limits current and voltage during operation to prevent frequent overcurrent or overvoltage trips. |
Enabling simple scalar control in SPLC-NZ8000 converters allows choosing the load type "General" or "Pump" in the menu.
-
General — general industrial mode for motors that operate with approximately equal torque at different speeds (compressors, conveyors, lifts). In this mode, the frequency converter can provide a starting torque over 150% for acceleration to overcome friction and inertia.
-
Pump — specialized mode for fans, pumps, and other motors that work with torque increasing with rotation speed, where high starting torque is not required.
Thus, the frequency converter SPLC-NZ8400-5R5G/7R5P is intended for controlling motors up to 5.5 kW, but when switching to scalar control and "Pump" mode it can control a motor up to 7.5 kW. In this case, the allowable overload is reduced: if in the normal "General" mode, a load no more than 150% for 60 seconds or 180% for 3 seconds is allowed, then in the "Pump" mode with a more powerful motor, these indicators decrease — overload no more than 120% for 60 seconds or 150% for 3 seconds.
Individual Functions SPLC-NZ8000
| Support for Various PG Boards |
Supports PG boards for rotary transformers, differential input, UVW differential input, resolver, and open collector input |
| Ride-through with Power Sag |
Voltage sag is compensated by load feedback energy, allowing the drive to continue operating for a short time. |
| Rated Current Limitation |
Prevents drive overcurrent frequency faults. |
| High Performance |
Control of asynchronous and synchronous motors is achieved by high-performance current vector technology. |
| Time Control |
Time range: 0.0-6500.0 minutes |
| Communication Method |
Modbus (standard)
Profibus-DP (optional)
CANlink (optional)
CAN (optional) |
| Protection Modes |
Detection of motor short-circuit on startup, phase loss protection on input or output, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Circuit Diagram of SPLC-NZ8400-5R5G/7R5P
SPLC-NZ8000 has multifunctional input-output control terminals, whose functions can be assigned independently in settings — set frequency, command forward run, stop, etc.:
- Input: 8 discrete inputs (including one high-speed pulse), 2 analogue inputs (one 0...10 V or 0...20 mA, second for +10...-10 V;
- Output: 1 discrete transistor output (high-speed), 2 relays 250 VAC 3 A or 30 VDC 1 A, 2 analogue outputs (0...10 or 0...20 mA).
By default, the frequency converter supports the most widespread communication port in enterprises of Ukraine RS-485, but upon request, these frequency inverters can be supplied with a board for data transmission Profibus or CAN, allowing easy integration of the equipment into any modern industrial network.
Choosing a Model of the SPLC-NZ8000 Frequency Converter Series
Parameters of SPLC-NZ8000 Series Converters for Three-phase Motors 380 V
| Model |
Rated Output Power, kW |
Rated Input Current, A |
Rated Output Current, A |
| SPLC-NZ8400-0R4G4 |
0.4 |
3.4 |
1.2 |
| SPLC-NZ8400-0R7G4 |
0.75 |
3.8 |
2.5 |
| SPLC-NZ8400-1R5G4 |
1.5 |
5 |
3.7 |
| SPLC-NZ8400-2R2G4 |
2.2 |
5.8 |
5 |
| SPLC-NZ8400-3R7G/5R5P4 |
3.7/5.5 |
10/15 |
9/13 |
| SPLC-NZ8400-5R5G/7R5P4 |
5.5/7.5 |
15/20 |
13/17 |
| SPLC-NZ8400-7R5G/11P4 |
7.5/11 |
20/26 |
17/25 |
| SPLC-NZ8400-11G/15P4 |
11/15 |
26/35 |
25/32 |
| SPLC-NZ8400-15G/18.5P4 |
15/18.5 |
35/38 |
32/37 |
| SPLC-NZ8400-18.5G/22P4 |
18.5/22 |
38/46 |
37/45 |
| SPLC-NZ8400-22G/30P4 |
22/30 |
46/62 |
45/60 |
| SPLC-NZ8400-30G/37P4 |
30/37 |
62/76 |
60/75 |
| SPLC-NZ8400-37G/45P4 |
37/45 |
76/90 |
75/90 |
| SPLC-NZ8400-45G/55P4 |
45/55 |
90/105 |
90/110 |
| SPLC-NZ8400-55G4 |
55 |
105 |
110 |
| SPLC-NZ8400-75P4 |
75 |
140 |
150 |
| SPLC-NZ8400-75G/90P4 |
75/90 |
140/160 |
150/176 |
| SPLC-NZ8400-90G/110P4 |
90/110 |
160/210 |
176/210 |
| SPLC-NZ8400-110G/132P4 |
110/132 |
210/240 |
210/253 |
| SPLC-NZ8400-132G/160P4 |
132/160 |
240/290 |
253/300 |
| SPLC-NZ8400-160G/185P4 |
160/185 |
290/330 |
300/340 |
| SPLC-NZ8400-185G/200P4 |
185/200 |
330/370 |
340/380 |
| SPLC-NZ8400-200G/220P4 |
200/220 |
370/410 |
380/420 |
On order
