Apparatus for electrical protection

An apparatus for providing electrical protection at a device comprising a motor unit, the apparatus comprising:

• a first fuse connected to the motor unit, the first fuse having a first breaking capacity, a first set of time-current characteristics, and a first rating;
• a second fuse connected to the first fuse and the motor unit, the second fuse having a second breaking capacity, a second set of time-current characteristics, and a second rating, wherein the second set of time-current characteristics is different from the first set of time-current characteristics and the second rating is different from the first rating;
• and
• a switch, wherein the switch is connected in series with both the first fuse and the second fuse,
• wherein the first fuse and the second fuse are connected in series,
• wherein a value of the first breaking capacity of the first fuse is set such that at a high overload current fault condition, the first fuse acts to interrupt current before the second fuse, and
• wherein a value of the second set of time-current characteristics of the second fuse is set such that at a locked rotor condition of the motor unit, the second fuse acts to interrupt current before the motor unit reaches a maximum winding temperature.