High-performance vector frequency inverters of the SPLC-NZ8400-315G/350P series are designed for controlling high-load three-phase electric motors 380 V with power up to 315 kW, where overloads may occur, and there are increased demands for control quality. These frequency inverters have a higher microprocessor performance than the series SPLC-АТ20, allowing SPLC-NZ8000 to execute operations faster and thus 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 lower accuracy and in "Pump" mode for operating with more powerful motors but with less load (details below).
The SPLC-NZ8000 inverter can also be optionally equipped with a PG card (sold separately). With it, a sensor encoder can be connected to the inverter to monitor the motor's rotational speed and rotor position. Vector control with feedback provides increased responsiveness and frequency control accuracy up to ±0.02%, allowing control of torque with accuracy up to ±5% and to work not only with asynchronous but also with synchronous motors.
Table — Main Technical Specifications of SPLC-NZ8400-315G/350P Inverters
| Input Voltage |
3ph 380 V
|
| Output Voltage |
3ph 380 V
|
| Output Power |
up to 315 kW (350 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Nominal Input Current |
580 A (620 A in "Pump" mode)
|
| Nominal Output Current |
600 A (640 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 moved to the front panel. A cable connector needs to be purchased for this purpose.
Technical Specifications of the SPLC-NZ8000 Series
Standard Functions of the SPLC-NZ8000 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 adjusted based on 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 Capacity |
G type: 60 s at 150% of nominal current, 3 s at 180% of nominal current
P type: 60 s at 120% of nominal current, 3 s at 150% of nominal current |
| Torque Boost |
Automatic boost
Manual boost 0.1%-30.0%
|
| V/F Curve |
Straight-line V/F curve
Multi-point V/F curve
Step V/F curve (1.2, 1.4, 1.6, 1.8, square) |
| V/F Split |
Two types: full split, partial split |
| Acceleration/Deceleration Mode |
Straight-line curve
S-shaped curve
Four groups of accel/decel times in range 0.0-6500.0 s
|
| DC Braking |
DC braking frequency: from 0.00 Hz to maximum frequency
Braking time: 0.0-100.0 s
Braking current action selection: 0.0% -100.0%
|
| JOG Control |
JOG frequency range: 0.00-50.00 Hz
JOG accel/decel time: 0.0-6500.0 s
|
| Built-in Multiple Preset Speeds |
Implementation of up to 16 speeds through simple PLC function or terminal state combination |
| Built-in PID |
Enables PID adjustment in closed loop control system |
| Voltage Auto-tuning |
Can ensure constant output voltage when main voltage changes. |
| Overload Current and Voltage Control |
Auto limit of current and voltage during operation to prevent frequent triggering of overload protection by current or voltage. |
Enabling simple scalar control in the SPLC-NZ8000 inverters allows selection in the menu of load type “General” or “Pump”.
-
General — general industrial mode for motors operating with approximately equal torque at different speeds (compressors, conveyors, lifts). In this mode, the frequency inverter can provide starting torque over 150% to overcome friction and inertia.
-
Pump — specialized mode for fans, pumps, and other electric motors working with torque that increases with speed and when high starting torque is not required.
Thus, the SPLC-NZ8400-315G/350P frequency inverter is designed to control motors up to 315 kW, but when switched to scalar control and "Pump" mode, it can handle a motor up to 350 kW. However, allowable overload decreases: if in normal "General" mode, the load can be no more than 150% for 60 s or 180% for 3 s, then in "Pump" mode with a more powerful motor, these figures are reduced — overload no more than 120% for 60 s or 150% for 3 s.
Individual Functions of SPLC-NZ8000
| Support for Various PG Cards |
Supports PG cards for transformer, differential input, UVW differential input, resolver, and open collector input |
| Operation During Power Outage |
Voltage drop is compensated by feedback load energy, allowing the drive to continue operation for a short time. |
| Nominal Current Limitation |
Prevents frequency inverter overcurrent failures. |
| High Performance |
Asynchronous and synchronous motor control is achieved through 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 |
Detects motor short circuit when powered on, input or output phase fault, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Circuit Diagram of Inverter SPLC-NZ8400-5R5G/7R5P
SPLC-NZ8000 has multifunctional input-output control terminals, the function of which can be assigned in settings — to set a frequency, issue a forward run command, stop command, etc.:
- Inputs: 8 discrete inputs (one of which is a 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 ports used in Ukrainian enterprises RS-485, but on request, these frequency inverters can be supplied with a Profibus or CAN data transmission card, allowing easy integration into any modern industrial network.
Selection of SPLC-NZ8000 Series Inverter Model
Parameters of SPLC-NZ8000 Series Inverter Models for Three-phase 380 V 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
