POWER DISTRIBUTION SYSTEMS USING DISTRIBUTED CURRENT SENSING

摘要

A system includes a plurality of power conversion devices, for example, uninterruptible power supply (UPS) devices, having inputs coupled in common to a power input line and each including a control circuit configured to operate the power conversion device responsive to a current sense signal at a current sense input thereof. The system further includes a first current transformer having a primary winding inductively coupled to the power input line, a current sense line coupled in series with a secondary winding of the first current transformer and a plurality of second current transformers, each including a primary winding inductively coupled to the current sense line and including respective secondary windings coupled to respective ones of the current sense inputs.