High-performance vector frequency inverters of the SPLC-NZ8400-350G/400P series are designed for controlling high-load three-phase electric motors 380 V with a power of up to 350 kW, where overloads may occur and high demands on control quality are set. These frequency inverters have a higher microprocessor performance than the SPLC-AT20 series, allowing SPLC-NZ8000 to execute operations faster and thereby provide sensorless vector control of rotational 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 the "Pump" mode for working with more powerful motors but with less load (details below).
The SPLC-NZ8000 inverter can also optionally be equipped with a PG board (purchased separately). With it, an encoder sensor can be connected to the inverter to monitor the motor's rotational speed and rotor position. Vector control with feedback provides increased responsiveness and control accuracy of rotational frequency up to ±0.02%, allowing control of torque with an accuracy of ±5% and the ability to work not only with asynchronous but also synchronous motors.
Table — Main technical parameters of frequency inverters SPLC-NZ8400-350G/400P
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 350 kW (400 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Rated Input Current |
620 A (670 A in "Pump" mode)
|
| Rated Output Current |
640 A (690 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 brought to the front panel. A connector cable is required for this.
Technical Specifications of SPLC-NZ8000 Series
Standard Features of SPLC-NZ8000 Frequency Inverter
| Control Modes |
Sensorless vector control (SFVC)
Vector control in closed-loop (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 automatically adjusts based on load characteristics. |
| Frequency Setting Resolution |
Digital setting: 0.01 Hz
Analog setting: maximum frequency × 0.025% |
| Starting Torque |
G type: 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 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 |
Automatic boost
Manual boost 0.1%-30.0%
|
| V/F Curve |
Linear V/F curve
Multimedia 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-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 selection: 0.0% -100.0%
|
| JOG Control |
JOG frequency range: 0.00-50.00 Hz
JOG acceleration/braking time: 0.0-6500.0 s
|
| Multiple Preset Speeds |
Up to 16 speeds can be realized through simple PLC function or terminal state combination |
| Built-in PID |
Enables closed-loop PID control system |
| Auto Voltage Regulation |
Can provide consistent output voltage when the main voltage changes. |
| Overcurrent and Overvoltage Management |
Automatically limits current and voltage during operation to prevent frequent overload triggering. |
Simple scalar control enabling in SPLC-NZ8000 inverters makes it possible to select the load type "General" or "Pump" in the menu.
-
General — general industrial mode for engines operating with approximately constant torque at different speeds (compressors, conveyors, lifts). In this mode, the frequency inverter can provide starting torque over 150% for acceleration to overcome friction and inertia.
-
Pump — specialized mode for fans, pumps, and other electric motors that work with torque increasing along with rotational speed and when high starting torque is not needed.
Thus, the frequency inverter SPLC-NZ8400-350G/400P is designed to control motors up to 350 kW, but when switched to scalar control and "Pump" mode can control an electric motor up to 400 kW. In this case, the allowable overload will decrease: if in the usual "General" mode, a load of no more than 150% for 60 s or 180% for 3 s is allowed, then in the "Pump" mode with a more powerful motor, these indicators decrease — the overload is no more than 120% for 60 s or 150% for 3 s.
Individual Features 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 |
| Ride Through Power Drop |
Power drop is compensated by feedback load energy, allowing the drive to continue short-time operation. |
| Rated Current Limit |
Avoids drive over-current frequency failure. |
| High Performance |
Control for asynchronous and synchronous motors is achieved through 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 during startup, phase loss protection for input or output, over-current, over-voltage, under-voltage, overheating, and overload protection. |
Diagram of SPLC-NZ8400-5R5G/7R5P Frequency Inverter
SPLC-NZ8000 comes with multifunctional input-output control terminals, whose functions can be independently set in the settings — define preset frequency, issue forward motion command, stop, and so on:
- 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 relays 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 in enterprises in Ukraine, RS-485, but these inverters can be supplied with a Profibus or CAN data transfer board on request, allowing easy integration into any modern industrial network.
Model Selection for SPLC-NZ8000 Series Inverters
Parameters of SPLC-NZ8000 Series Inverters for 380 V Three-phase Motors
| 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
