High-performance vector frequency converters of the SPLC-NZ8400-15G/18.5P series are designed for controlling high-load three-phase electric motors 380 V with a power capacity of up to 15 kW, where there can be overloads and high management quality is required. These frequency converters have higher microprocessor performance than the SPLC-AT20 series, allowing SPLC-NZ8000 to execute operations faster and thus ensure sensorless vector control of rotation speed with an accuracy of ±0.5%. If necessary, the frequency converter can switch to simple scalar control mode U/f with lower accuracy and "Pump" mode for working with more powerful motors but with less load (details below).
The SPLC-NZ8000 converter can also optionally be equipped with a PG board (purchased separately). With it, an encoder can be connected to the converter to track motor rotation speed and rotor position. Vector control with feedback provides increased responsiveness and rotational speed accuracy up to ±0.02%, allows torque control with an accuracy of up to ±5%, and works not only with asynchronous but also with synchronous motors.
Table — Main Technical Specifications of Frequency Converters SPLC-NZ8400-15G/18.5P
| Input Voltage |
3Ph 380 V
|
| Output Voltage |
3Ph 380 V
|
| Output Power |
up to 15 kW (18.5 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Nominal Input Current |
35 A (38 A in "Pump" mode)
|
| Nominal Output Current |
32 A (37 A in "Pump" mode)
|
| IP Rating EN 60529 |
IP20 |
When installing the frequency converter in a protective cabinet, its control panel (operator panel) can be detached and moved to the front panel. To do this, a connector cable purchase is required.
Technical Specifications 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
The carrier frequency is automatically adjusted according to the nature of the load. |
| 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 Boosting |
Auto-boosting
Manual boosting 0.1%-30.0%
|
| V/F Curve |
Linear V/F curve
Multi-point V/F curve
Step V/F curve (1.2, 1.4, 1.6, 1.8, quadratic) |
| V/F Division |
Two types: full division, partial division |
| Acceleration/Deceleration Mode |
Linear curve
S-curve
Four groups of acceleration/deceleration time 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/braking time: 0.0-6500.0 s
|
| Built-in Multiple Set Speeds |
Up to 16 speeds can be implemented via simple PLC function or terminal state combination |
| Built-in PID |
PID regulation for closed loop system |
| Automatic Voltage Adjustment |
Can maintain constant output voltage when the main voltage fluctuates. |
| Over Current and Voltage Overload Management |
Automatically limits current and voltage during operation to prevent frequent trips due to overcurrent or overvoltage. |
Enabling simple scalar control in SPLC-NZ8000 converters allows for menu selection of "General" or "Pump" load types.
-
General — a general-industrial mode for engines that operate with nearly the same torque at different speeds (compressors, conveyors, elevators). In this mode, the frequency converter can provide a starting torque above 150% for acceleration to overcome friction and inertia forces.
-
Pump — a specialized mode for fans, pumps, and other electric motors that work with torque increasing along with rotation speed and when there's no need for high starting torque.
Thus, the frequency converter SPLC-NZ8400-5R5G/7R5P is intended for controlling motors up to 5.5 kW, but when switching to scalar control and "Pump" mode, it can handle electric motors up to 7.5 kW. However, allowable overload decreases: if in normal "General" mode load up to 150% for 60 s or 180% for 3 s is allowed, in "Pump" mode with a more powerful engine these parameters reduce — overload no more than 120% for 60 s or 150% for 3 s.
Individual Features of SPLC-NZ8000
| Support for Various PG Boards |
Supports PG boards for rotary transformer, differential input, differential input UVW, resolver, and open collector input |
| Operation through Power Dip |
Voltage dip is compensated by back-feed load energy, thus the drive can continue operating for a short time. |
| Limit of Nominal Current |
Prevents frequency drive overcurrent error. |
| High Performance |
Control of asynchronous and synchronous motors is realised through the high-performance current vector technology. |
| Time Management |
Time range: 0.0-6500.0 mins |
| Communication Method |
Modbus (standard)
Profibus-DP (optional)
CANlink (optional)
CAN (optional) |
| Protection Modes |
Motor short circuit detection on start, input or output phase failure protection, overcurrent, overvoltage, undervoltage, overheating, and overload protection. |
Principle Diagram of Frequency Converter SPLC-NZ8400-5R5G/7R5P
SPLC-NZ8000 features multifunctional input-output control terminals, which can be self-assigned in settings — defining set frequency, issuing forward run command, stop, etc.:
- Inputs: 8 discrete inputs (including 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 relay outputs 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 enterprises in Ukraine, RS-485, but on request, these frequency inverters can be supplied with a board for data transmission via Profibus or CAN, making it easy to integrate the equipment into any modern industrial network.
Selection of SPLC-NZ8000 Series Frequency Converter Models
Parameters of SPLC-NZ8000 Series Converter 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
