High-performance vector frequency inverters of the SPLC-NZ8400-30G/37P series are designed for controlling high-load three-phase electric motors 380 V with a power up to 30 kW, where overloads may occur, and where high control requirements are imposed. These frequency converters have a higher microprocessor performance than the SPLC-AT20 series, allowing the SPLC-NZ8000 to execute operations faster and thus 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 to "Pump" mode for working with more powerful motors but with lower loads (details below).
Additionally, the SPLC-NZ8000 inverter can be fitted with a PG board (purchased separately). With it, a sensor-encoder can be connected to the inverter to monitor motor speed and rotor position. Vector control with feedback provides increased responsiveness and frequency control accuracy up to ±0.02%, allows torque control with an accuracy of ±5%, and works not just with asynchronous but also synchronous motors.
Table — Main Technical Parameters of Frequency Inverters SPLC-NZ8400-30G/37P
| Input Voltage |
3-phase 380 V
|
| Output Voltage |
3-phase 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) |
| Nominal Input Current |
62 A (76 A in "Pump" mode)
|
| Nominal Output Current |
60 A (75 A in "Pump" mode)
|
| Protection Class EN 60529 |
IP20 |
When installing a frequency inverter in a protective cabinet, its control panel (operator panel) can be detached and brought out to the front panel. To do this, a cable connector must be purchased.
Technical Specifications of the SPLC-NZ8000 Series
Standard Functions of SPLC-NZ8000 Frequency Inverter
| Control Modes |
Sensorless Vector Control (SFVC)
Vector Control with Feedback (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 auto-adjusts depending on 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 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 |
Auto boost
Manual boost 0.1%-30.0%
|
| V/F Curve |
Linear V/F curve
Multi-point V/F curve
Stepped V/F curve (1.2, 1.4, 1.6, 1.8, quadratic) |
| V/F Split |
Two types: full split, partial split |
| Acceleration/Deceleration Mode |
Linear curve
S-curve
Four groups of acceleration/deceleration time in the range 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 Multiple Preset Speeds |
Implementation of up to 16 speeds via simple PLC function or terminal state combination |
| Built-in PID |
Enable PID control for closed-loop system |
| Auto-voltage Adjustment |
Can maintain constant output voltage when the mains voltage fluctuates. |
| Overcurrent and Overvoltage Management |
Automatically limits current and voltage during operation to prevent frequent occurrence of overcurrent or overvoltage faults. |
Enabling simple scalar control in SPLC-NZ8000 inverters allows selecting the load type “General” or “Pump” from the menu.
-
General — general industrial mode for motors operating with approximately equal torque at different speeds (compressors, conveyors, hoists). In this mode, the 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 that operate with torque increasing with speed and when there is no need for high starting torque.
Thus, the frequency inverter SPLC-NZ8400-5R5G/7R5P is designed to drive motors up to 5.5 kW, but when switching to scalar control and "Pump" mode, it can control an electric motor up to 7.5 kW. The permissible overload will decrease: while the "General" mode allows a load not more than 150% for 60 seconds or 180% for 3 seconds, in "Pump" mode with a more powerful motor, these parameters decrease — overload no more than 120% for 60 seconds or 150% for 3 seconds.
Individual Functions of SPLC-NZ8000
| Support for Various PG Boards |
Supports PG boards for rotary transformer, differential input, differential UVW input, resolver, and open collector input |
| Power Drop Ride-through |
Voltage drop is compensated by load feedback energy, allowing the drive to keep running briefly. |
| Nominal Current Limitation |
Avoids overcurrent fault on the drive frequency. |
| High Performance |
Control of both asynchronous and synchronous motors is realized through high-performance current vector technology. |
| Time Management |
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 at startup, input or output phase failure protection, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Schematic Diagram of Frequency Inverter SPLC-NZ8400-5R5G/7R5P
SPLC-NZ8000 has multifunctional input-output control terminals, which can be assigned independently in settings — to define set frequency, issue a forward motion command, stop, etc.:
- Inputs: 8 discrete inputs (one of which is high-speed pulse), 2 analog inputs (one 0...10 V or 0...20 mA, the second only for +10...-10 V;
- Outputs: 1 discrete transistor output (high-speed), 2 relay outputs 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 commonly used communication port in Ukrainian enterprises RS-485, but on request, these frequency inverters can be supplied with a board for Profibus or CAN data transmission, allowing easy integration of equipment into any modern industrial network.
Selecting Model of SPLC-NZ8000 Series Frequency Inverter
Parameters of SPLC-NZ8000 Series Inverter Models for Three-phase 380 V Motors
| Model |
Rated 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
