After completing the installation:
If your unit has outdated firmware (check via Info menu on the web interface):
Rotate the knob through all positions. It should click firmly with 30° or 45° travel. No grinding.
A surprising number of installation errors stem from using the wrong variant. Check the label on the side or back of the NKKD315:
| Parameter | Value to confirm | Your system | | --- | --- | --- | | Rated insulation voltage (Ui) | 690V AC minimum | ____ V | | Rated thermal current (Ith) | e.g., 32A, 63A, 125A | ____ A | | Rated operational voltage (Ue) | 400V or 480V | ____ V | | Utilization category | AC-23A (motor switching) or AC-22A (resistive) | ____ | | Number of contacts | 2NO+2NC, 4NO, 6NO, etc. | ____ |
Cross-reference with your motor nameplate. For example, a 15kW motor at 400V draws ~30A. An NKKD315 rated for 32A is sufficient. For 22kW (40A), you need the 63A frame.
If "nkkd315" is a physical component:
Before starting the installation, make sure you:
Before you begin the NKKD315 install, you must understand what the device is. The NKKD315 is typically a 30A to 63A rated cam switch (the "315" often refers to a series or thermal current rating, e.g., 315A for larger frames, but verify your datasheet). It features:
Common applications:
Warning: Do not confuse the NKKD315 with a household light switch. This device is designed for industrial voltages (up to 690V AC) and can interrupt full load currents.