High-performance vector frequency inverters of the SPLC-NZ8400-7R5G/11P series are designed to control high-load three-phase electric motors 380 V with power up to 7.5 kW, where overloads may occur, and high management quality is required. These frequency converters have higher microprocessor performance than the SPLC-AT20 series, allowing SPLC-NZ8000 to perform 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 precision and in "Pump" mode for operating with more powerful motors but with less load (details below).
The converter SPLC-NZ8000 can also have an additional PG board installed (purchased separately). This allows a sensor-encoder to be connected to the inverter for monitoring the speed of the motor and the rotor position. Vector control with feedback provides increased speed and accuracy of frequency control up to ±0.02%, allows torque control with an accuracy up to ±5%, and can work not only with asynchronous but also with synchronous motors.
Table — Main technical parameters of the frequency inverters SPLC-NZ8400-7R5G/11P
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 7.5 kW (11 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Nominal Input Current |
20 A (26 A in "Pump" mode)
|
| Nominal Output Current |
17 A (25 A in "Pump" mode)
|
| Protection Level EN 60529 |
IP20 |
When installing the 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 Features 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 adjusted depending on the load character. |
| 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 Capability |
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 Enhancement |
Automatic enhancement
Manual enhancement 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 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 sec
|
| DC Braking |
DC braking frequency: from 0.00 Hz to maximum frequency
Braking time: 0.0-100.0 sec
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 sec
|
| Built-in Multiple Speed Settings |
Implementation of up to 16 speeds through simple PLC function or terminal state combination |
| Built-in PID |
Enabling PID regulation in a closed-loop system |
| Voltage Auto-adjustment |
It provides stable output voltage when the main voltage changes. |
| Over-current and Over-voltage Management |
Automatically limits current and voltage during operation to prevent frequent overload tripping by current or voltage. |
Enabling simple scalar control in SPLC-NZ8000 inverters allows selection in the menu of load type “General” or “Pump”.
-
General — general industrial mode for motors that operate with approximately the same torque at different speeds (compressors, conveyors, lifts). In this mode, the frequency converter can provide a starting torque over 150% for acceleration, overcoming friction and inertia forces.
-
Pump — specialized mode for fans, pumps and other electric motors operating with torque increasing with rotational speed and when high starting torque is not needed.
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 “Pump” mode, it can control an electric motor up to 7.5 kW. In this case, the allowable overload is reduced: while in "General" mode, a load of no more than 150% for 60 sec or 180% for 3 sec is allowed, in "Pump" mode with a more powerful motor, these indicators drop — overload no more than 120% for 60 sec or 150% for 3 sec.
Individual Functions of SPLC-NZ8000
| Supporting Various PG Boards |
Supports PG boards for rotating transformer, differential input, differential UVW input, resolver and open collector input |
| Run during Power Loss |
Voltage drop is compensated by load feedback energy, allowing the drive to continue running for a short period. |
| Current Limit Management |
Avoids overcurrent failure of the drive’s frequency. |
| High Performance |
Management of asynchronous and synchronous motors is realized through high-performance current vector technology. |
| Time Management |
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 at start-up, input or output phase break protection, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Wiring Diagram of the Inverter SPLC-NZ8400-5R5G/7R5P
SPLC-NZ8000 features multifunctional input-output control terminals, whose functions can be self-assigned in the settings — to define the set frequency, give the forward run command, stop, etc.:
- Inputs: 8 digital inputs (one of which is a high-speed pulse), 2 analog inputs (one 0...10 V or 0...20 mA, the other for +10...-10 V;
- Outputs: 1 digital 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 common communication port at Ukrainian enterprises 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.
Selecting the Model of the SPLC-NZ8000 Inverter Series
Parameters of the SPLC-NZ8000 Series Inverter Models 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
