High-performance vector frequency inverters of the SPLC-NZ8400-900G/1000P series are designed for controlling high-load three-phase electric motors 380 V with a power of up to 900 kW, where overloads might occur, and high demands are placed on control quality. These frequency inverters have a higher microprocessor performance than the SPLC-AT20 series, which allows the SPLC-NZ8000 to execute operations faster and ensure sensorless vector control of rotation speed with an accuracy of ±0.5%. If necessary, the inverter can switch to simple scalar control mode U/f with less precision and to "Pump" mode for operating with more powerful motors but with less load (details below).
The SPLC-NZ8000 inverter can also be equipped with a PG board (purchased separately). With it, an encoder sensor can be connected to the inverter to monitor the motor's rotation speed and rotor position. Vector control with feedback provides increased speed and accuracy of rotation frequency control up to ±0.02%, allows controlling torque with an accuracy of ±5% and operates not only with asynchronous but also with synchronous motors.
Table — Main technical parameters of the inverters SPLC-NZ8400-900G/1000P
| Input Voltage |
3phase 380 V
|
| Output Voltage |
3phase 380 V
|
| Output Power |
up to 900 kW (1000 kW in "Pump" mode)
|
| Output Frequency Range |
from 0.1 to 3200.0 Hz (V/f) |
| Rated Input Current |
1640 A (1800 A in "Pump" mode)
|
| Rated Output Current |
1640 A (1720 A in "Pump" mode)
|
| Protection Level EN 60529 |
IP20 |
When installing a frequency inverter in a protective cabinet, its control panel (operator panel) can be detached and mounted on the front panel. For this, a connector cable is required.
Technical Characteristics of the SPLC-NZ8000 Series
Standard Functions of the SPLC-NZ8000 Frequency 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 Automatically Adjusts Based on Load Type. |
| 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
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 in the 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 Multiple Preset Speeds |
Implementation of Up to 16 Speeds through Simple PLC Function or Terminal State Combination |
| Built-in PID |
Enabling PID Adjustment in Closed-loop System |
| Automatic Voltage Regulation |
Ensures Constant Output Voltage When the Main Voltage Changes. |
| Overload Current and Voltage Control |
Automatically Limits Current and Voltage During Operation to Prevent Frequent Over-current or Over-voltage Trips. |
Enabling simple scalar control in SPLC-NZ8000 inverters makes it possible to select
On order
