Function and Application
The NJR2-D series soft starter is centered on advanced dual-CPU control technology, controlling the thyristor module to realize the soft start and soft stop functions of three-phase AC induction motors. It also has multiple protection functions such as overload, input phase loss, output phase loss, load short circuit, start current limit timeout, overvoltage, and undervoltage. The NJR2-D series is a soft starter that requires an external bypass contactor. The voltage series is 380V, and the power specifications range from 7.5kW to 500kW. It has strong load adaptability and stable and reliable operation, making it an ideal replacement for traditional star-delta starting and autotransformer voltage reduction starting. The product complies with standards: GB/T 14048.6, IEC 60947-4-2.
Details
Parameters:
Start mode: 4 types
Overload protection mode: 5 types
Failure record: 9 times
Maximum power: 500KW
Advantages/Core Functions:
01 Stable and Reliable
Wide voltage and current design, suitable for various application scenarios
Enhanced EMC design, higher EMS interference resistance, high stability
02 Easy to Use
No neutral wire design, more convenient to use
LCD display panel with Chinese/English, easier debugging
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| System Parameters | 4.1 Main Power Supply Voltage | 380V±57V. |
| 4.2 Main Power Frequency | 50Hz±1Hz. |
| 4.3 Applicable Motor | Standard squirrel-cage three-phase induction motor. |
| 4.4 Pollution Level | Level 3. |
| 4.5 Protection Level | IP20. |
| 4.6 Rated Insulation Voltage | 660V. |
| 4.7 Rated Impulse Withstand Voltage | 2kV. |
| 4.8 Cooling Method | Natural air cooling. |
| 4.9 Start Frequency | Recommended not more than 10 times per hour; the heavier the load, the lower the start frequency should be. |
| 4.10 Vibration Resistance | Vibration less than 0.5g. |
| 4.11 Environmental Conditions | For altitudes above 1000m, derating should be applied accordingly. For altitudes between 1000m and 3000m, current derating is 0.5% for every 100m increase. Customization is required for altitudes above 3000m. |
| 4.12 Relative Humidity | Not more than 95% (20~65°C); no condensation, no flammable or explosive gases, no conductive dust, and good ventilation. |
| 4.13 Soft Start Time | (2~60)s. |
| 4.14 Soft Stop Time | (0~60)s. |
| 4.15 Start Delay | (0~999)s. |
| 4.16 Interval Time | (0~999)s. |
| 4.17 Programming Delay | (0~999)s. |
| 4.18 Start Mode | 4 types. |
| 4.19 Stop Mode | 2 types. |
| 4.20 Soft Start Initial Voltage | (30~70)%. |
| 4.21 Soft Start Current Limit Range | (50~500)%le. |
| 4.22 Soft Stop Current Limit Range | (20~100)%. |
