High-performance vector frequency converters of the SPLC-NZ8400-630G series are designed to manage high-load three-phase electric motors 380 V with power up to 630 kW, where overloading is possible, and high management quality is required. These frequency converters have a higher processor performance compared to the SPLC-AT20 series, allowing SPLC-NZ8000 to perform operations faster and ensure sensorless vector control of rotation speed with precision of ±0.5%. If needed, the inverter can switch to simple scalar control mode U/f with lower precision and "Pump" mode for working with more powerful motors but with less load (details below).
Additionally, a PG card can be optionally installed in the SPLC-NZ8000 converter (purchased separately). With it, a sensor-encoder can be connected to the inverter to monitor the speed and rotor position of the motor. Vector control with feedback provides increased responsiveness and control accuracy of rotation frequency to ±0.02%, allowing torque control with an accuracy of ±5% and work not only with asynchronous but also synchronous motors.
Table — Main technical parameters of frequency converters SPLC-NZ8400-630G
| Input Voltage |
3-phase 380 V
|
| Output Voltage |
3-phase 380 V
|
| Output Power |
up to 630 kW
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Rated Input Current |
1050 A
|
| Rated Output Current |
1100 A
|
| Protection Degree EN 60529 |
IP20 |
When installing the frequency converter in a protective cabinet, its control panel (operator panel) can be detached and brought to the front panel. This requires purchasing a connector cable.
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 depending 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 the rated current, 3 s at 180% of the rated current
P type: 60 s at 120% of the rated current, 3 s at 150% of the rated current |
| Torque Boost |
Auto boost
Manual boost 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 Split |
Two types: full split, partial split |
| 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/deceleration time: 0.0-6500.0 s
|
| Built-in Multi-speed Settings |
Implement up to 16 speeds through simple PLC function or terminal status combination |
| Built-in PID |
Enable closed-loop system PID control |
| Automatic Voltage Tuning |
Can ensure constant output voltage when the main voltage changes. |
| Overload Current and Voltage Management |
Automatic limitation of current and voltage during operation to prevent frequent triggering of overload on current or voltage. |
SPLC-NZ8000 operates in the “General” load mode.
-
General — general industrial mode for motors operating with approximately the same torque at different speeds (compressors, conveyors, lifts). In this mode, the frequency converter will be able to provide starting torque over 150% to overcome frictional forces and inertia.
Individual Features of SPLC-NZ8000
| Support of Various PG Boards |
Support for PG boards for rotating transformers, differential input, differential input UVW, resolver and open collector input |
| Operation through Power Drop |
Power supply drop is compensated by feedback load energy, so the drive can continue to operate for a short time. |
| Nominal Current Limitation |
Prevents frequency failure due to current overload of the drive. |
| High Performance |
Management of asynchronous and synchronous motors is implemented through high-performance current vector technology. |
| Time Management |
Time range: 0.0-6500.0 minutes |
| Communication Method |
Modbus (standard)
Profibus-DP (on request)
CANlink (on request)
CAN (on request) |
| Protection Modes |
Detection of motor short circuit upon start-up, protection against input or output phase breaks, overcurrent, overvoltage, undervoltage, overheating, and overload. |
Basic Circuit Diagram of the SPLC-NZ8400-5R5G/7R5P Inverter
SPLC-NZ8000 has multifunctional input-output control terminals, whose functions can be individually assigned in the settings — to define frequency setting, issue forward command, stop, etc.:
- Input: 8 discrete inputs (one high-speed pulse), 2 analogue inputs (one 0...10 V or 0...20 mA, the second for +10...-10 V;
- Output: 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 converter supports the most common enterprise communication port in Ukraine, RS-485, but on request, these frequency inverters can be supplied with a data transfer board for Profibus or CAN, facilitating easy integration into any modern industrial network.
On order
