Fuse less protection with a manual motor starter saves costs, space and ensures a quick reaction under shortcircuit condition, by switching off the motor within milliseconds. Fuse less starter combinations are setup together with contactors.
The ABB MS325 is a manual motor starter designed as an electro-mechanical protection device for main circuits. It provides fuse-less protection against short-circuits, overloads, and phase failures by switching off the motor within milliseconds when combined with contactors.
This datasheet details the technical data for the MS325 series, including rated operational voltages up to 690V AC or 440V DC, trip classes, and short-circuit breaking capacities. It also provides specific order codes for various current settings from 0.16A to 25A, along with UL/CSA motor ratings and environmental specifications.
| Rated operational voltage AC | 690 V |
|---|---|
| Rated operational voltage DC | 440 V |
| Number of poles | 3 |
| Rated frequency | 50/60 Hz |
| Mechanical durability | 100000 operations |
| Electrical durability | 50000 operations |
| Degree of protection | IP20 |
| Maximum operating altitude | up to 2000 m |
The device features a trip class of 10A.
No, it is short-circuit proof up to 100 kA without requiring a back-up fuse.
The tightening torque is specified as 1.4 Nm.