Patent ID: 9557389
Date: 2017-01-31
CPC Classifications: G01R,H02H

Claim:
1. A monitoring apparatus connected, in parallel with a motor, to a plurality of power supply lines, each of the plurality of power supply lines having a different phase, the monitoring apparatus comprising: a first isolator configured to, in response to a first control signal, selectively allow a first current to flow from a first power supply line of the plurality of power supply lines to a second power supply line of the plurality of power supply lines through a third isolator, wherein the first current is electrically isolated from the first control signal; a second isolator configured to, in response to a second control signal, selectively allow a second current to flow from the second power supply line of the plurality of power supply lines to a third power supply line of the plurality of power supply lines through the third isolator, wherein the second current is electrically isolated from the second control signal; and a control module configured to: