High-performance vector frequency inverters of the SPLC-NZ8400-18.5G/22P series are designed for controlling high-load three-phase electric motors 380 V with a power of up to 18.5 kW, where overloads may occur, and high demands on control quality are made. These frequency inverters have a higher processor performance than the SPLC-AT20 series, allowing the SPLC-NZ8000 to execute operations faster and thereby 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 less accuracy and to "Pump" mode for working with more powerful motors but with less load (details below).
Also, a PG-board can be optionally installed on the SPLC-NZ8000 inverter (purchased separately). With it, an encoder sensor can be connected to the inverter to monitor motor rotation 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 ±5%, and can work not only with asynchronous but also synchronous motors.
Table — Main Technical Parameters of SPLC-NZ8400-18.5G/22P Frequency Inverters
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 15 kW (18.5 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Nominal Input Current |
35 A (38 A in "Pump" mode)
|
| Nominal Output Current |
32 A (37 A in "Pump" mode)
|
| Protection Degree EN 60529 |
IP20 |
When installing the frequency inverter in a protective cabinet, its control panel (operator panel) can be detached and moved to the front panel. To do this, a cable-connector must be purchased.
Technical Specifications of the SPLC-NZ8000 Series
Standard Functions of the SPLC-NZ8000 Frequency Inverter
| Control Modes |
Sensorless vector control (SFVC)
Closed-loop vector control (CLVC, with PG)
Volt-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 load characteristics. |
| Frequency Setting Resolution |
Digital setting: 0.01 Hz
Analog 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 |
Type G: 60 s at 150% of nominal current, 3 s at 180% of nominal current
Type P: 60 s at 120% of nominal current, 3 s at 150% of nominal current |
| Torque Boost |
Autoboost
Manual boost 0.1%-30.0%
|
| V/F Curve |
Linear V/F curve
Multipoint V/F curve
Step V/F curve (1.2, 1.4, 1.6, 1.8, quadratic) |
| V/F Splitting |
Two types: full split, partial split |
| Acceleration/Deceleration Mode |
Linear curve
S-curve
Four groups of acceleration/deceleration times within 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 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 via simple PLC function or a combination of terminal states |
| Built-in PID |
Enabling PID regulation of the closed-loop system |
| Auto Voltage Tuning |
Can provide constant output voltage when the main voltage changes. |
| Overcurrent and Overvoltage Management |
Automatic current and voltage limit during operation to prevent frequent overcurrent or overvoltage trips. |
Enabling simple scalar control in the SPLC-NZ8000 inverters makes it possible to select the load type “General” or “Pump” in the menu.
-
General — general industrial mode for motors running with approximately the same torque at different speeds (compressors, conveyors, lifts). In this mode, the frequency inverter can provide a starting torque of more than 150% for acceleration to overcome friction and inertia forces.
-
Pump — specialized mode for fans, pumps, and other electric motors that work with torque increasing with rotation speed where high starting torque is not needed.
Thus, the frequency inverter SPLC-NZ8400-5R5G/7R5P is designed for controlling 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. The maximum overload tolerance will decrease: if in normal mode "General" a load not exceeding 150% for 60 s or 180% for 3 s is allowed, then in "Pump" mode with a more powerful motor these figures are reduced — overloads should not exceed 120% for 60 s or 150% for 3 s.
Individual Features of SPLC-NZ8000
| Support for Various PG Boards |
Support for PG boards for rotational transformer, differential input, differential input UVW, resolver, and open collector input |
| Ride through Power Dip |
Power dip is compensated by energy from load feedback, allowing the drive to continue operation for a short time. |
| Rated Current Limit |
Prevents frequency drive overcurrent failure. |
| High Performance |
Control of asynchronous and synchronous motors is implemented using 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 |
Detecting motor short circuit on start-up, phase break protection on input or output, overcurrent, overvoltage, undervoltage, overheating, and overload. |
Wiring Diagram of SPLC-NZ8400-5R5G/7R5P Inverter
SPLC-NZ8000 has multifunctional input-output control terminals, whose function can be independently set in the settings — for defining the set frequency, giving a forward run command, stop, etc.:
- Inputs: 8 discrete inputs (including one high-speed pulse), 2 analog inputs (one 0...10 V or 0...20 mA, the other only for +10...-10 V;
- Outputs: 1 discrete transistor output (high-speed), 2 relay 250 VAC 3 A or 30 VDC 1 A, 2 analog outputs (0...10 or 0...20 mA).
By default, the frequency inverter supports the most common communication port RS-485 found in Ukrainian enterprises, but these frequency inverters can be supplied with a data transfer board Profibus or CAN on request, allowing easy integration of equipment into any modern industrial network.
Selection of Frequency Inverter Model in SPLC-NZ8000 Series
Model Parameters of SPLC-NZ8000 Series Inverters for 380 V Three-phase Motors
| 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
