Method and apparatus for testing utility power devices

摘要

An apparatus for performing measurements on a utility power device that shares a common ground with the apparatus selectively sends a first high voltage signal via a first lead to a first terminal of the utility power device, measures a first corresponding signal returned via a second lead of the apparatus from a second terminal of the utility power device. While the corresponding first lead and the second lead of the apparatus remain electrically coupled to the corresponding first and the second terminal of the utility power device. The apparatus selectively sends a second high voltage signal via the second lead to the second terminal of the utility power device, and measures a second corresponding signal returned via the first lead of the apparatus from the first terminal of the utility power device.

主权项

1. A method of performing multiple test measurements on a utility power device, comprising:
providing an apparatus having at least a processor, at least one switching network, a common high voltage source, and having at least both a first and a second lead selectively coupled to the common high voltage source for sending and receiving high voltage signals to a first and a second terminal of the utility power device, wherein the apparatus and the utility power device both share a common ground; coupling a first low voltage lead of the apparatus to a third terminal of the utility power device, wherein the third terminal is neither a chassis ground nor the common ground of the utility power device; selectively sending a first high voltage signal via the first lead of the apparatus to the first terminal of the utility power device; measuring respective first electrical parameters across the first terminal and the second terminal of the utility power device as a first corresponding signal returned via the second lead of the apparatus which is connected to the second terminal of the utility power device; simultaneously measuring respective third electrical parameters across the first terminal and the third terminal of the utility power device returned via the first low voltage lead of the apparatus which is connected to the third terminal of the utility power device; while the corresponding first lead, the second lead and the first low voltage lead of the apparatus remain electrically coupled to the corresponding first terminal, the second terminal and the third terminal of the utility power device, selectively sending a second high voltage signal via the second lead of the apparatus to the second terminal of the utility power device, measuring respective second electrical parameters across the second terminal and the first terminal of the utility power device as a second corresponding signal returned via the first lead of the apparatus which is connected to the first terminal of the utility power device; and simultaneously measuring respective fourth electrical parameters across the second terminal and the third terminal of the utility power device returned via the first low voltage lead of the apparatus which is connected to the third terminal of the utility power device.