American Power Conversion Corporation

Michael Lysik

William E Ziegler

Namwook Paik

Michael Manganese

Joseph Dechene

Andrew Chase

One embodiment of the invention provides a UPS including a precharge circuit and a battery pack sensor electrically coupled to the precharge circuit. The sensor senses the presence of an extra battery pack. The precharge circuit includes: a first precharge contact; a capacitor having first and second leads, the first lead electrically coupled to the first contact; a second precharge contact electrically coupled to the second lead of the capacitor; a current limiting circuit having first and second leads, the first lead of the current limiting circuit electrically coupled to the first lead of the capacitor; and a third precharge contact electrically coupled to the second lead of the current limiting circuit. The UPS can further include an enclosure having a housing and a battery connector integral to the housing, the battery connector adapted to receive the first, second and third precharge contacts.

Uninterruptible power supply systems and enclosures

An uninterruptible power supply (UPS) system using a battery pack may be potentially hazardous in its design, and in particular when users themselves connect or disconnect the battery from the UPS while the UPS is still active. A battery cap is provided that attaches to the battery to cover parts where the lead wires meet the terminals of the battery.

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Amesbury, MA, United States of America

Michael Lysik