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US 2023/0352929 A1Published application
Apparatus for electrical protection
AssigneeKoninklijke Philips N.V.
InventorsWalter Alex Planegger, Robi Rek
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AssigneeKoninklijke Philips N.V.
InventorsWalter Alex Planegger, Robi Rek
Estimating the term…
An apparatus includes a first fuse having a first breaking capacity, a first set of time-current characteristics, and a first rating; a second fuse having a second breaking capacity, a second set of time-current characteristics, and a second rating. 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. The first fuse and the second fuse are connected in series, the value of the first breaking capacity is set such that at a high current fault condition the first fuse acts to interrupt the current before the second fuse, and the value of the second set of time-current characteristics is set such that at a locked rotor condition of the motor unit the second fuse acts to interrupt the current before the motor unit reaches a maximum winding temperature.
An apparatus (100) for providing electrical protection at a device comprising a motor unit, the apparatus comprising:
The apparatus (100) according to any one of the preceding claims, wherein the first breaking capacity is in the range between 1200 A and 1800 A, and the second breaking capacity is in the range between 25 A to 45 A.
The apparatus (100) according to any one of the preceding claims, further comprising a switch (130) or an electronic control unit arranged between the first fuse and the second fuse.
The apparatus (100) according to any one of the preceding claims, further comprising a rectifier unit (140) connected to the motor unit, the rectifier unit being configured to provide rectified voltage to the motor unit.
A device (200) comprising the apparatus (100) according to any one of the preceding claims, the device further comprising the motor unit (210).
Dependencies are inferred from the claim text.