Motor protection switch MS165 with thermal and electromagnetic protection represents the compact and powerful series with high short-circuit breaking capacity for motor protection up to 30 kW (400 V) with a module width of 55 mm. The temperature-compensated device has a rotary handle operation with a clear switch position indicator I/TRIP/0. In addition, MS165 has a short-circuit indicator. The rotary handle can be locked directly in the 0 position using a padlock. Auxiliary, signal and short-circuit signaling contacts as well as undervoltage and shunt current releases can be installed without tools. 3-phase rails for 125 A allow several motor protection switches to be fed together. Accessories for control cabinet installation complement the range. Atex validation allows the protection of motors in Ex areas, UL approval as a self-protected combination motor controller expands the area of application in North America.
| Property | Value |
| Number of poles: | 3 |
| Rated operating voltage: | 250 to 690 V |
| Rated operating power at AC-3, 400 V: | 7.5 kW |
| Rated continuous current Iu: | 20 A |
| Rated short-circuit breaking current Icu at 400 V, AC: | 100 kA |
| Overload release current setting: | 14 to 20 A |
| Tripping technology: | thermomagnetic |
| Phase failure sensitive: | yes |
| Connection type main circuit: | Screw connection |
| Device design: | Complete device in housing |
| Protection class (IP): | IP20 |
| Width: | 55 mm |
| Setting range of the instantaneous short-circuit release: | 300 A |
| With integrated auxiliary switch: | no |
| With integrated undervoltage release: | no |
| Height: | 142.65 mm |
| Depth: | 122.1 mm |
| Version of the Actuating element: | Rotary knob |
| With thermal protection: | yes |
