High-performance vector frequency converters of the SPLC-NZ8400-22G/30P series are designed for controlling highly loaded three-phase electric motors 380 V with a capacity of up to 22 kW, where overloads may occur, and higher quality control requirements are imposed. These frequency converters have a higher microprocessor performance than the series SPLC-AT20, allowing the SPLC-NZ8000 to execute operations faster, thereby providing sensorless vector control of the rotation speed with an accuracy of ±0.5%. If necessary, the inverter can switch to a simple scalar control mode U/f with lower accuracy and a "Pump" mode for working with more powerful engines, but with less load (details below).
Additionally, a PG board can be installed in the SPLC-NZ8000 converter (purchased separately). With it, the inverter can connect an encoder sensor to track the motor speed and rotor position. Vector control with feedback provides increased response and control accuracy of rotation frequency up to ±0.02%, allows torque control with an accuracy of up to ±5%, and operates not only with asynchronous but also synchronous motors.
Table — Main technical parameters of SPLC-NZ8400-22G/30P frequency converters
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 30 kW (37 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Rated Input Current |
62 A (76 A in "Pump" mode)
|
| Rated Output Current |
60 A (75 A in "Pump" mode)
|
| Protection Degree EN 60529 |
IP20 |
When installing the frequency converter in a protective cabinet, its control panel (operator's panel) can be detached and moved to the front panel. To do this, a connecting cable is required.
Technical Specifications of the SPLC-NZ8000 Series
Standard Functions of SPLC-NZ8000 Frequency Converter
| Control Modes |
Sensorless Vector Control (SFVC)
Closed-Loop Vector Control (CLVC, with PG)
Voltage-Frequency (V/F) Control |
| Maximum Output Frequency |
Vector Control: 0-320 Hz
V/F Control: 0-3200 Hz
|
| Carrier Frequency |
1-16 kHz
Carrier frequency is automatically adjusted according to the nature of the load. |
| 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 Capability |
G type: 60 s at 150% of rated current, 3 s at 180% of rated current
P type: 60 s at 120% of rated current, 3 s at 150% of rated current |
| Torque Boost |
Auto 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 Division |
Two types: Full division, Partial division |
| Acceleration/Deceleration Mode |
Linear Curve
S-shaped Curve
Four groups of acceleration/deceleration time in the range 0.0-6500.0 s
|
| DC Braking |
DC Braking Frequency: from 0.00 Hz to maximum frequency
Braking Time: 0.0-100.0 s
Braking Current Action Choice: 0.0% -100.0%
|
| JOG Control |
JOG Frequency Range: 0.00-50.00 Hz
JOG Acceleration/Deceleration Time: 0.0-6500.0 s
|
| Built-in Multi-speed Settings |
Implementation of up to 16 speeds through simple PLC function or combination of terminal states |
| Built-in PID |
Enable PID regulation of the closed-loop system |
| Auto Voltage Regulation |
Can provide a steady output voltage when the main voltage changes. |
| Over-current and Over-voltage Management |
Automatically limits current and voltage during operation to prevent frequent tripping on over-current or over-voltage. |
Switching to simple scalar control in SPLC-NZ8000 converters makes it possible to choose the load type in the menu “General” or “Pump”.
-
General — general industrial mode for motors that operate with approximately the same torque at different speeds (compressors, conveyors, hoists). In this mode, the frequency converter can provide a starting torque above 150% for starting up to overcome frictional forces and inertia.
-
Pump — specialized mode for fans, pumps, and other electric motors that operate with increasing torque as the speed increases and when there is no need for high starting torque.
For example, frequency converter SPLC-NZ8400-5R5G/7R5P is designed to control motors up to 5.5 kW, but when switched to scalar control and “Pump” mode, it can control a motor up to 7.5 kW. However, the permissible overload will decrease: while the "General" mode allows for load up to 150% for 60 s or 180% for 3 s, in "Pump" mode with a more powerful motor, these indicators are reduced — overload no more than 120% for 60 s or 150% for 3 s.
Individual Functions of SPLC-NZ8000
| Support for Various PG Boards |
Support for PG boards for rotating transformer, differential input, UVW differential input, resolver, and open collector input |
| Power Drop Ride-through |
The power drop is compensated by load feedback energy, allowing the drive to continue operating for a short time. |
| Limit Rated Current |
Allows avoiding drive frequency overcurrent failure. |
| High Performance |
Management of asynchronous and synchronous motors is implemented using high-performance vector current technology. |
| Time Management |
Time range: 0.0-6500.0 min |
| Communication Method |
Modbus (standard)
Profibus-DP (optional)
CANlink (optional)
CAN (optional) |
| Protection Modes |
Detection of motor short circuit at power-on, phase loss protection, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Fundamental Diagram of the Frequency Converter SPLC-NZ8400-5R5G/7R5P
SPLC-NZ8000 features multifunctional input-output control terminals, the function of which can be self-assigned in the settings — to specify the set frequency, issue the forward motion command, stop, etc.:
- Inputs: 8 digital inputs (one of which is high-speed pulse input), 2 analogue inputs (one 0...10 V or 0...20 mA, the other only for +10...-10 V;
- Outputs: 1 digital 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 inverter supports the RS-485 communication port most commonly used in Ukrainian enterprises, but these frequency inverters can be supplied with a board for data transmission via Profibus or CAN on request, making it easy to integrate equipment into any modern industrial network.
Selecting a Model of the SPLC-NZ8000 Series Frequency Converter
Parameters of SPLC-NZ8000 Series Converters for Three-phase Motors 380V
| 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
