High-performance vector frequency inverters of the SPLC-NZ8400-75G/90P series are designed for controlling high-load three-phase electric motors 380 V with power up to 75 kW, where overloads may occur and high control quality requirements are set. These inverters have a higher processor performance than the SPLC-AT20 series, allowing the SPLC-NZ8000 to perform operations faster and thus provide sensorless vector control of rotation speed to an accuracy of ±0.5%. If required, the inverter can switch to simple scalar control mode U/f with lower accuracy and in "Pump" mode for operation with more powerful motors but with lower load (details below).
The SPLC-NZ8000 inverter can also be fitted with an additional PG-board (purchased separately). With it, an encoder sensor can be connected to the inverter to track motor rotation speed and rotor position. Vector feedback control offers increased speed and frequency control accuracy to ±0.02%, allows torque control to ±5%, and works not only with asynchronous but also synchronous motors.
Table — Main Technical Parameters of SPLC-NZ8400-75G/90P Inverters
| Input Voltage |
3Ph 380 V
|
| Output Voltage |
3Ph 380 V
|
| Output Power |
Up to 75 kW (90 kW in "Pump" mode)
|
| Output Frequency Range |
From 0.1 to 3200.0 Hz (V/f) |
| Nominal Input Current |
140 A (160 A in "Pump" mode)
|
| Nominal Output Current |
150 A (176 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 placed on the front panel. For this, a cable-connector needs to 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)
Voltage-Frequency (V/F) Control |
| Maximum Output Frequency |
Vector Control: 0-320 Hz
V/F Control: 0-3200 Hz
|
| Carrier Frequency |
1-16 kHz
The carrier frequency is automatically corrected depending on the load character. |
| Frequency 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 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
Multidest 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 |
| Acceleration/Deceleration Mode |
Linear curve
S-shaped curve
Four groups of acceleration/deceleration time in the range of 0.0-6500.0 s
|
| DC Braking |
DC braking frequency: from 0.00 Hz to maximum frequency
Braking time: 0.0-100.0 s
Choice of brake current action: 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 Preset Speeds |
Implementation up to 16 speeds through the function of a simple PLC or combination of terminal states |
| Built-in PID |
PID regulation in closed-loop system enabled |
| Automatic Voltage Tuning |
Can provide constant output voltage when the main voltage changes. |
| Over-current and Over-voltage Load Management |
Automatic current and voltage limits during operation to prevent frequent activation of over-current or over-voltage protection. |
Enabling simple scalar control in SPLC-NZ8000 converters makes it possible to select "General" or "Pump" load type in the menu.
-
General — general industrial mode for motors that operate with approximately the same torque at different speeds (compressors, conveyors, elevators). In this mode, the frequency inverter can provide a starting torque of over 150% to overcome friction and inertia forces.
-
Pump — specialized mode for fans, pumps, and other electric motors that operate with increasing torque as rotation speed increases and where high starting torque is not necessary.
Thus, the frequency inverter SPLC-NZ8400-75G/90P4 is designed to control motors up to 75 kW, but when switched to scalar control mode and "Pump" mode, it can control an electric motor up to 90 kW. However, permissible overload will be reduced: if in "General" mode an overload 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 decrease — overload is no more than 120% for 60 s or 150% for 3 s.
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 |
| Operation During Power Drop |
Power drop is compensated by the feedback load energy, allowing the drive to run for a short time. |
| Rated Current Limitation |
Avoids drive frequency overload errors. |
| High Performance |
Control of asynchronous and synchronous motors is carried out through high-performance current vector technology. |
| Time Control |
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 on start-up, input or output phase break protection, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Circuit Diagram of Inverter SPLC-NZ8400-5R5G/7R5P
SPLC-NZ8000 features multifunctional input-output control terminals, whose functions can be independently assigned in settings — determining the set frequency, issuing forward run command, stopping, etc.:
- Inputs: 8 discrete inputs (one 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 prevalent communication port on enterprises in Ukraine RS-485, but upon order, these frequency inverters can be supplied with a board for data transmission via Profibus or CAN, allowing easy integration of the equipment into any modern industrial network.
Selecting a Model of SPLC-NZ8000 Inverter Series
Parameters of SPLC-NZ8000 Series Inverter Models for Three-phase Motors 380 V
| 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
