High-performance vector frequency converters of the SPLC-NZ8400-90G/110P series are designed for controlling highly-loaded three-phase electric motors 380 V with a power of up to 90 kW, where overloads may occur, and high demands are made on the quality of control. These frequency converters have a higher processor performance than the SPLC-AT20 series, allowing 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 a simple scalar control mode U/f with less accuracy and a "Pump" mode for working with more powerful motors but with less load (details below).
Additionally, the SPLC-NZ8000 converter can be equipped with an PG board (purchased separately). With it, the inverter can connect an encoder sensor to monitor the motor rotation speed and rotor position. Vector control with feedback provides increased responsiveness and accuracy of rotational frequency control up to ±0.02%, allows for torque control with an accuracy of ±5% and works not only with asynchronous but also synchronous motors.
Table — Main technical parameters of frequency converters SPLC-NZ8400-90G/110P
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 90 kW (110 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Rated Input Current |
160 A (210 A in "Pump" mode)
|
| Rated Output Current |
176 A (210 A in "Pump" mode)
|
| Protection Degree EN 60529 |
IP20 |
When installing the frequency converter in a protective cabinet, its control panel (operator panel) can be detached and moved to the front panel. For this, a connector cable needs to be purchased.
Technical Characteristics 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)
Volt-Frequency (V/F) Control |
| Max 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 characteristics. |
| Frequency Resolution |
Digital setup: 0.01 Hz
Analogue setup: max 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 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-like V/F curve (1.2, 1.4, 1.6, 1.8, quadratic) |
| V/F Segmentation |
Two types: full segmentation, partial segmentation |
| Acceleration/Deceleration Mode |
Linear curve
S-shaped curve
Four groups of acceleration/deceleration time ranging 0.0-6500.0 s
|
| DC Braking |
DC braking frequency: from 0.00 Hz to max frequency
Braking time: 0.0-100.0 s
Brake 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 using simple PLC function or terminal combination states |
| Built-in PID |
Enable PID regulation in closed-loop systems |
| Voltage Auto-tuning |
Can ensure constant output voltage when the main voltage changes. |
| Overload Current and Voltage Management |
Automatic limiting of current and voltage during operation to prevent frequent overload tripping on current or voltage. |
Enabling simple scalar control in the SPLC-NZ8000 converters makes it possible to select the load type in the menu as “General” or “Pump”.
-
General — a general industrial mode for motors operating with approximately equal torque at different speeds (compressors, conveyors, elevators). In this mode, the frequency converter can provide a starting torque of more than 150% for acceleration, to overcome friction and inertia.
-
Pump — a specialized mode for fans, pumps, and other electric motors that operate with torque that increases with rotational speed and when there is no need for high starting torque.
Thus, the frequency converter SPLC-NZ8400-90G/110P is designed for controlling motors up to 90 kW, but when switched to scalar control mode and "Pump" mode, it can control an electric motor up to 110 kW. In this case, the allowable overload reduces: if in normal "General" mode a load 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 are reduced — overload not exceeding 120% for 60 s or 150% for 3 s.
Unique Functions of SPLC-NZ8000
| Support for Various PG Boards |
Support for PG boards for revolving transformers, differential input, differential input UVW, resolvers and open collector inputs |
| Run Through Power Drop |
Power drop is compensated by load feedback energy, so the drive can continue to operate for a short time. |
| Rated Current Limit |
Allows avoiding drive current frequency exceedance 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 min |
| Communication Method |
Modbus (standard)
Profibus-DP (optional)
CANlink (optional)
CAN (optional) |
| Protection Modes |
Detection of motor short circuit upon start-up, protection against input or output phase disconnection, overcurrent, overvoltage, undervoltage, overheating and overload. |
Wiring Diagram of the Inverter SPLC-NZ8400-90G/110P
SPLC-NZ8000 has multi-functional input-output control terminals, which can be independently set in the settings — set the specified frequency, issue a 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 V or 0...20 mA).
By default, the frequency converter supports the most common communication port RS-485 at enterprises in Ukraine, but these inverters can be supplied with a board for data transmission Profibus or CAN on request, making it easy to integrate equipment into any modern industrial network.
Model Selection for the SPLC-NZ8000 Inverter Series
Model parameters for the SPLC-NZ8000 series converters 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
