公开(公告)号：US11125821B2

公开(公告)日：2021-09-21

申请号：US16835450

申请日：2020-03-31

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Edmund O. Schweitzer, III ,  David E. Whitehead ,  Tony J. Lee ,  David J. Casebolt ,  Krishnanjan Gubba Ravikumar ,  David Schmidt ,  Austin Edward Wade

IPC: G01R31/327 ,  H01H47/00 ,  H02H1/00

Abstract: Systems and methods for testing a protection relay, such as a primary bus protection relay, may include a testing device for providing current signals imitating current on both sides of a bus to the primary bus protection relay. The signals may be provided using signals corresponding with a signal format from merging units or other monitoring devices. The testing device may be configured to receive communications from the primary bus protection relay for evaluation of the operation of the primary bus protection relay.

公开(公告)号：US11112466B2

公开(公告)日：2021-09-07

申请号：US16796563

申请日：2020-02-20

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Edmund O. Schweitzer, III ,  Tony J. Lee ,  David E. Whitehead ,  David J. Casebolt ,  Krishnanjan Gubba Ravikumar ,  Austin Edward Wade ,  Lisa Gayle Nelms

IPC: G01R31/06 ,  G01R31/62 ,  G01R31/327 ,  H01F27/40 ,  H02H7/04

Abstract: The present disclosure pertains to devices, systems, and methods for monitoring an electric power system. In one embodiment, a system may detect a failure in an electric power system. The system may include a communication interface to receive a first indication related to a condition in the electric power system, and a second indication related to the condition. The system may also include a test subsystem to compare the first indication to the second indication and to determine a discrepancy between the first indication and the second indication. A diagnostic subsystem may identify the failure based on the discrepancy between the first indication and the second indication. An alert subsystem may generate an alert based on the failure.

公开(公告)号：US20210111549A1

公开(公告)日：2021-04-15

申请号：US16788408

申请日：2020-02-12

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Edmund O. Schweitzer, III ,  David E. Whitehead ,  David J. Casebolt ,  Krishnanjan Gubba Ravikumar ,  Austin Edward Wade ,  Lisa Gayle Nelms ,  Brian R. Clark

IPC: H02H1/00

Abstract: The present disclosure pertains to systems and methods for monitoring electrical arc events in an electric power system. In one embodiment, a system may comprise an arc flash detection (AFD) unit to detect electromagnetic radiation generated by an electrical arc event, a primary protection relay to generate measurements of an electric current, and an integrator. In various embodiments, the integrator may comprise a communication port to receive the detection of the electrical arc event and the measurements of the electric current. The integrator may also comprise a processing subsystem to validate the detection of the electrical arc and generate protective actions to interrupt the flow of the current to the electrical arc event.

公开(公告)号：US20210109156A1

公开(公告)日：2021-04-15

申请号：US16835450

申请日：2020-03-31

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Edmund O. Schweitzer, III ,  David E. Whitehead ,  Tony J. Lee ,  David J. Casebolt ,  Krishnanjan Gubba Ravikumar ,  David Schmidt ,  Austin Edward Wade

IPC: G01R31/327 ,  H01H47/00 ,  H02H1/00

Abstract: Systems and methods for testing a protection relay, such as a primary bus protection relay, may include a testing device for providing current signals imitating current on both sides of a bus to the primary bus protection relay. The signals may be provided using signals corresponding with a signal format from merging units or other monitoring devices. The testing device may be configured to receive communications from the primary bus protection relay for evaluation of the operation of the primary bus protection relay.