High-performance vector frequency converters of the SPLC-NZ8400-160G/185P series are designed for controlling high-load three-phase electric motors 380 V with power up to 160 kW, where overloads may occur, and higher requirements are set for control quality. These frequency converters have higher microprocessor performance than the SPLC-AT20 series, allowing the 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 a simple scalar control mode U/f with lower accuracy and to "Pump" mode for operating with more powerful motors but with less load (details below).
The SPLC-NZ8000 converter can also be equipped with a PG board (purchased separately). With it, the inverter can be connected to an encoder sensor to monitor engine rotation speed and rotor position. Vector control with feedback provides increased responsiveness and control frequency accuracy up to ±0.02%, allows torque control accuracy up to ±5% and works not only with asynchronous but also synchronous motors.
Table — Main technical parameters of SPLC-NZ8400-160G/185P frequency converters
| Input Voltage |
3Ph 380 V
|
| Output Voltage |
3Ph 380 V
|
| Output Power |
up to 160 kW (185 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Nominal Input Current |
290 A (330 A in "Pump" mode)
|
| Nominal Output Current |
300 A (340 A in "Pump" mode)
|
| Protection Rating EN 60529 |
IP20 |
When installing a frequency converter in a protective cabinet, its control panel (operator panel) can be detached and moved to the front panel. A connector cable must be purchased for this.
Technical Specs of the SPLC-NZ8000 Series
Standard Features of the SPLC-NZ8000 Frequency Converter
| 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 load nature. |
| 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 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
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 |
| Acceleration/Deceleration Mode |
Linear curve
S-curve
Four sets of acceleration/deceleration time 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 Acceleration/Deceleration Time: 0.0-6500.0 s
|
| Built-in Several Set Speeds |
Implementation of up to 16 speeds through simple PLC function or terminal state combination |
| Built-in PID |
PIT control in closed-loop system activation |
| Auto Voltage Regulation |
Provides constant output voltage when main voltage changes. |
| Overvoltage and Overcurrent Management |
Automatically limits current and voltage during operation to prevent frequent overcurrent or overvoltage triggering. |
Simple scalar control activation in SPLC-NZ8000 converters allows menu selection of load type "General" or "Pump".
-
General — industrial mode for motors operating with approximately equal torque at different speeds (compressors, conveyors, elevators). In this mode, the frequency converter can provide a starting torque over 150% for acceleration to overcome friction and inertia.
-
Pump — specialized mode for fans, pumps, and other motors operating with torque increasing alongside rotation speed, where there is no need for high starting torque.
The SPLC-NZ8400-160G/185P frequency converter is designed for controlling motors up to 160 kW, but when switching to scalar control and "Pump" mode, it can control a motor up to 185 kW. However, permissible overload will decrease: if in "General" mode the load is allowed up to 150% for 60 s or 180% for 3 s, then in "Pump" mode with a more powerful engine these figures drop — overload is no more than 120% for 60 s or 150% for 3 s.
Distinctive Functions of SPLC-NZ8000
| Support for Different PG Cards |
Support for PG cards for rotating resolver, differential input, differential input UVW, resolver and open collector input |
| Operation during Power Drop |
Load feedback energy compensates for voltage drop, allowing the drive to operate for short periods. |
| Current Limitation |
Prevents drive overcurrent fault frequency from occurring. |
| High Performance |
Control of asynchronous and synchronous motors is achieved using high-performance vector current technology. |
| Timing Control |
Time Range: 0.0-6500.0 min |
| Communication Method |
Modbus (standard)
Profibus-DP (optional)
CANlink (optional)
CAN (optional) |
| Protection Modes |
Motor short circuit detection upon start-up, protection for input or output phase loss, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Schematic Diagram of the Inverter SPLC-NZ8400-160G/185P
SPLC-NZ8000 has multifunctional input-output control terminals, whose functions can be self-assigned in the settings — determining the set frequency, sending forward movement command, stop etc.:
- Inputs: 8 discrete inputs (one of which is pulse high-speed), 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 relay 250 VAC 3 A or 30 VDC 1 A, 2 analogue outputs (0...10 or 0...20 mA).
By default, the frequency converter supports the most common communication port in Ukrainian enterprises, RS-485, but by request, these frequency inverters can come with a board for data transmission Profibus or CAN, allowing easy integration of equipment into any modern industrial network.
Choosing a Frequency Converter Model of the SPLC-NZ8000 Series
Model Parameters of the SPLC-NZ8000 Series Converters for Three-phase Motors 380 V
| Model |
Rated 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
