High-performance vector frequency inverters of the SPLC-NZ8400-280G/315P series are designed for controlling high-load three-phase electric motors 380 V with a power of up to 280 kW, where overloads may occur and high quality of control is required. These frequency 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 the rotation speed with an accuracy of ±0.5%. If necessary, the inverter can switch to simple scalar control mode U/f with less accuracy and to "Pump" mode for working with more powerful engines but with less load (details below).
Also, the inverter SPLC-NZ8000 can be additionally equipped with a PG board (purchased separately). With it, a sensor-encoder can be connected to the inverter to track the motor's rotation speed and rotor position. Vector control with feedback offers enhanced responsiveness and control accuracy for rotation frequency up to ±0.02%, enabling torque control accuracy up to ±5% and operation not only with asynchronous but also synchronous motors.
Table — Main technical parameters of frequency inverters SPLC-NZ8400-280G/315P
| Input voltage |
3ph 380 V
|
| Output voltage |
3ph 380 V
|
| Output power |
up to 280 kW (315 kW in "Pump" mode)
|
| Output frequency range |
from 0.1 to 3200.0 Hz (V/f) |
| Nominal input current |
500 A (580 A in "Pump" mode)
|
| Nominal output current |
520 A (600 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 mounted on the front panel. A connector cable must be purchased for this.
Technical characteristics of the SPLC-NZ8000 series
Standard functions of the SPLC-NZ8000 frequency inverter
| Control modes |
Sensorless vector control (SFVC)
Vector control in closed loop (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
The carrier frequency automatically adapts to the 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 accuracy |
±0.5% (SFVC), ± 0.02% (CLVC, with PG)
|
| Torque control accuracy |
±5% (CLVC, with PG) |
| Overload capability |
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 |
Automatic boost
Manual boost 0.1%-30.0%
|
| V/F curve |
Straight line V/F curve
Multiple point V/F curve
Stepped V/F curve (1.2, 1.4, 1.6, 1.8, quadratic) |
| V/F separate |
Two types: full separation, partial separation |
| Acceleration/deceleration mode |
Straight line curve
S-curve
Four groups of acceleration/deceleration time in the range 0.0-6500.0 s
|
| DC braking |
DC brake frequency: from 0.00 Hz to maximum frequency
Brake time: 0.0-100.0 s
Brake current action choice: 0.0% -100.0%
|
| JOG control |
JOG frequency range: 0.00-50.00 Hz
JOG acceleration/deceleration time: 0.0-6500.0 s
|
| Multi-speed built-in |
Realizes up to 16 speeds via simple PLC function or a combination of terminal states |
| Built-in PID |
Enables PID regulation in closed-loop systems |
| Voltage auto-tuning |
Can provide constant output voltage when the main voltage changes. |
| Overcurrent and voltage overload management |
Automatically limits current and voltage during operation to prevent frequent activations from overcurrent or an overvoltage condition. |
Activating simple scalar control in the SPLC-NZ8000 inverters enables selection of load type "General" or "Pump" in the menu.
-
General — general industrial mode for motors operating with roughly the same torque at different speeds (compressors, conveyors, lifts). In this mode, the frequency inverter can provide over 150% starting torque for acceleration to overcome friction and inertia forces.
-
Pump — specialized mode for fans, pumps, and other electric motors operating with a torque that increases with speed and does not require high starting torque.
Thus, the frequency inverter SPLC-NZ8400-280G/315P is designed to control engines up to 280 kW, but when switching to scalar control and "Pump" mode can manage an electric motor up to 315 kW. In this case, the allowable overload will decrease: if in the "General" mode loads of no more than 150% for 60 s or 180% for 3 s are allowed, then in the "Pump" mode with a more powerful engine these indicators decrease — overloads no more than 120% for 60 s or 150% for 3 s.
Individual functions of SPLC-NZ8000
| Support for various PG boards |
Support for PG boards for rotating transformer, differential input, UVW differential input, resolver and open collector input |
| Ride through power dips |
Voltage dips are compensated with load feedback energy, allowing the drive to continue operating for a short time. |
| Current limiting |
Allows avoidance of drive frequency failure from overcurrent. |
| High performance |
Control of asynchronous and synchronous motors are implemented using 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 startup, protection from phase loss on input or output, overcurrent, overvoltage, undervoltage, overheating, and overloading. |
Block diagram of the inverter SPLC-NZ8400-5R5G/7R5P
SPLC-NZ8000 features multifunctional input-output control terminals, whose functions can be set independently in settings — designate desired frequency, command forward motion, stop, etc.:
- Inputs: 8 discrete inputs (one high-speed pulse), 2 analogue inputs (one 0...10 V or 0...20 mA, 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 on enterprises in Ukraine, RS-485, but these inverters can be ordered with a board for data transmission via Profibus or CAN, making it easy to integrate equipment into any modern industrial network.
Choosing the model of the SPLC-NZ8000 series inverter
Parameters of SPLC-NZ8000 series inverters 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
