High-performance vector frequency inverters of the SPLC-NZ8400-11G/15P series are designed for controlling high-load three-phase electric motors 380 V with a power of up to 11 kW, where overloads may occur, and high requirements are imposed on control quality. 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 rotation speed with 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 operating with more powerful engines but under less load (details below).
The inverter SPLC-NZ8000 can also optionally be equipped with a PG board (purchased separately). With it, the inverter can connect an encoder sensor to monitor motor rotation speed and rotor position. Vector control with feedback provides increased responsiveness and control accuracy of rotation frequency to ±0.02%, allows controlling the torque with accuracy to ±5%, and works not only with asynchronous but also synchronous motors.
Table — Main technical parameters of frequency inverters SPLC-NZ8400-11G/15P
| Input Voltage |
3p 380 V
|
| Output Voltage |
3p 380 V
|
| Output Power |
up to 11 kW (15 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Nominal Input Current |
26 A (35 A in "Pump" mode)
|
| Nominal Output Current |
25 A (32 A in "Pump" mode)
|
| Protection Class EN 60529 |
IP20 |
When installing the frequency inverter in a protective cabinet, its control panel (operator panel) can be disconnected and mounted on the front panel. For this, you need to purchase a connector cable.
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 corrected depending on load characteristics. |
| 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 Precision |
±0.5% (SFVC), ± 0.02% (CLVC, with PG)
|
| Torque Control Precision |
±5% (CLVC, with PG) |
| Overload Capacity |
G type: 60 sec at 150% of rated current, 3 sec at 180% of rated current
P type: 60 sec at 120% of rated current, 3 sec at 150% of rated current |
| Torque Boost |
Auto Boost
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 Split |
Two types: full split, partial split |
| Ramp/Braing Mode |
Linear curve
S-shaped curve
Four groups of acceleration/deceleration times ranging from 0.0-6500.0 sec
|
| DC Braking |
DC braking frequency: from 0.00 Hz to maximum frequency
Braking time: 0.0-100.0 sec
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 sec
|
| Multiple Preset Speeds |
Up to 16 speeds can be realized through simple PLC function or terminal status combination |
| Built-in PID |
Enable PID regulation in a closed-loop system |
| Voltage Auto-Tuning |
Can provide a constant output voltage when the main voltage changes. |
| Overload Current and Voltage Management |
Automatically limits current and voltage during operation to prevent frequent trips due to current or voltage overload. |
Enabling simple scalar control in SPLC-NZ8000 inverters allows selecting the load type "General" or "Pump" in the menu.
-
General — General industrial mode for engines operating with approximately the same torque at different speeds (compressors, conveyors, lifts). In this mode, the frequency inverter can supply over 150% starting torque for acceleration to overcome friction and inertia.
-
Pump — Specialized mode for fans, pumps, and other electrical machines that work with torque that increases with rotation speed and when there is no need for high starting torque.
Thus, the frequency inverter SPLC-NZ8400-5R5G/7R5P is designed for controlling motors up to 5.5 kW, but when switching to scalar control and the "Pump" mode can control an electric motor up to 7.5 kW. In this case, the permissible overload decreases: if in the normal "General" mode allows a load of no more than 150% for 60 sec or 180% for 3 sec, then in "Pump" mode with a more powerful motor, these indicators are reduced — overload not more than 120% for 60 sec or 150% for 3 sec.
Individual Functions of SPLC-NZ8000
| Support for Various PG Boards |
Supports PG boards for rotating transformer, differential input, differential input UVW, resolver, and open-collector input |
| Run During Power Dip |
Voltage dip is compensated by feedback load energy, allowing the drive to run for a short time continuously. |
| Current Limitation |
Allows avoiding drive current over-frequency faults. |
| High Performance |
Management of asynchronous and synchronous motors is implemented through high-performance current vector technology. |
| Time Management |
Time range: 0.0-6500.0 min |
| Communication Method |
Modbus (standard)
Profibus-DP (on order)
CANlink (on order)
CAN (on order) |
| Protection Modes |
Detection of motor short circuit in start, input or output phase break protection, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Block Diagram of SPLC-NZ8400-5R5G/7R5P
SPLC-NZ8000 has multifunctional input-output control terminals, the function of which can be independently assigned in the settings — determine the set frequency, give the command for forward motion, stop, etc.:
- Inputs: 8 discrete inputs (one is high-speed pulse), 2 analogue inputs (one 0...10 V or 0...20 mA, the second 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 across Ukraine RS-485, but upon order, these frequency inverters can be supplied with a data transmission board for Profibus or CAN, which will allow easy integration into any modern industrial network.
Choosing a Model of the SPLC-NZ8000 Frequency Converter Series
Parameters of the SPLC-NZ8000 Converter Models for 380V 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
