High-performance vector frequency inverters of the SPLC-NZ8400-37G/45P series are designed to control heavily loaded three-phase electric motors of 380 V with a power of up to 37 kW, where overloads may occur, and higher control quality requirements are set. These frequency inverters have higher microprocessor performance than the SPLC-AT20 series, allowing SPLC-NZ8000 to execute operations faster and provide sensorless vector control of rotation speed with an accuracy of ±0.5%. If necessary, the inverter can switch to simple scalar control mode U/f with lower accuracy and "Pump" mode for operating with more powerful motors, but with less load (details below).
Additionally, in the inverter SPLC-NZ8000 a PG board can be installed (purchased separately). With it, a sensor-encoder can be connected to the inverter to track the motor's rotation speed and rotor position. Feedback vector control provides increased fast response and control accuracy of rotation frequency to ±0.02%, allows torque management with accuracy up to ±5%, and works not only with asynchronous but also synchronous motors.
Table — Main technical parameters of inverters SPLC-NZ8400-5R5G/7R5P
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 37 kW (45 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Nominal Input Current |
76 A (90 A in "Pump" mode)
|
| Nominal Output Current |
75 A (90 A in "Pump" mode)
|
| Protection Degree EN 60529 |
IP20 |
When the frequency converter is installed in a protective cabinet, its control panel (operator panel) can be detached and moved to the front of the panel. To do this, a connector cable must be purchased.
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)
Volts-Per-Hertz (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 depending on the load nature. |
| 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 s at 150% of the rated current, 3 s at 180% of the rated current
P type: 60 s at 120% of the rated current, 3 s at 150% of the rated current |
| Torque Boost |
Auto boost
Manual boost 0.1%-30.0%
|
| V/F Curve |
Linear V/F curve
Multi-point V/F curve
Segmented V/F curve (1.2, 1.4, 1.6, 1.8, quadratic) |
| V/F Split |
Two types: full split, partial split |
| Acceleration/Braking Mode |
Linear curve
S-shaped curve
Four groups of acceleration/deceleration time in 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 selection: 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 Multiple Set Speeds |
Implementation of up to 16 speeds through simple PLC function or terminal state combination |
| Built-in PID |
Enable PID control of the closed-loop system |
| Auto-tuning Voltage |
Can maintain a constant output voltage when the main voltage changes. |
| Overload Current and Voltage Management |
Automatic limitation of current and voltage during operation to prevent frequent operation under overload conditions. |
Enabling simple scalar control in the SPLC-NZ8000 inverters makes it possible to select the menu load type "General" or "Pump".
-
General — general industrial mode for motors operating with nearly constant torque at various speeds (compressors, conveyors, lifts). In this mode, the frequency inverter can provide a starting torque over 150% for acceleration, to overcome friction and inertia.
-
Pump — specialized mode for fans, pumps and other electric motors where the torque increases with rotation speed and when there is no need for high starting torque.
Thus, the frequency inverter SPLC-NZ8400-5R5G/7R5P is designed to control 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. However, allowable overload is reduced: if in the normal "General" mode an overload of no more than 150% for 60 s or 180% for 3 s is allowed, then in "Pump" mode with a more powerful motor these indicators decrease — overload of no more than 120% for 60 s or 150% for 3 s.
Individual Functions of SPLC-NZ8000
| Support for Various PG Boards |
Supports PG boards for rotary transformer, differential input, differential input UVW, resolver, and open collector input |
| Operation Through Power Sag |
Voltage dips are compensated by load feedback energy, allowing the drive to continue operating for a short time. |
| Rated Current Limitation |
Helps prevent drive overcurrent trip faults. |
| High Performance |
Control of asynchronous and synchronous motors is realized using high-performance current vector technology. |
| Time Control |
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 on start-up, input or output phase loss protection, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Principal Circuit Diagram of the Frequency Inverter SPLC-NZ8400-37G/45P
SPLC-NZ8000 features multifunctional input-output control terminals, whose functions can be assigned independently in the settings — to determine the set frequency, give the forward motion command, stop, etc.:
- Inputs: 8 discrete inputs (one of which is high-speed pulse), 2 analogue inputs (one 0...10 V or 0...20 mA, the other only for +10...-10 V;
- Outputs: 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 inverter supports the most common communication port in enterprises of Ukraine RS-485, but on request, these frequency inverters can be supplied with a board for data transmission via Profibus or CAN, which allows easy integration of the equipment into any modern industrial network.
Model Selection of the SPLC-NZ8000 Series Frequency Inverter
Specifications of SPLC-NZ8000 Series Inverter Models for Three-Phase Motors 380 V
| Model |
Nominal Output Power, kW |
Nominal Input Current, A |
Nominal 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
