公开(公告)号：CA2736009C

公开(公告)日：2013-07-16

申请号：CA2736009

申请日：2009-09-18

Applicant: SCHWEITZER ENGINEERING LAB INC

Inventor： SCHWEITZER EDMUND O ,  SKENDZIC VESELIN ,  DAS DHRUBA P ,  SCHEER GARY W ,  KESLER JAMES R ,  TROUT DOUGLAS M

IPC: G01R35/00 ,  G01R31/02 ,  H02H3/00 ,  H02H7/22

Abstract: An method for automatically testing an arc flash detection system by periodically or continually transmitting electro-optical (EO) radiation through one or more transmission cables electro-optically coupled to respective EO radiation collectors. A test EO signal may pass through the EO radiation collector to be received by an EO sensor. An attenuation of the EO signal may be determined by comparing the intensity of the transmitted EO signal to an intensity of the received EO signal. A self-test failure may be detected if the attenuation exceeds a threshold. EO signals may be transmitted according to a particular pattern (e.g., a coded signal) to allow an arc flash detection system to distinguish the test EO radiation from EO radiation indicative of an arc flash event.

公开(公告)号：AU2010257266B2

公开(公告)日：2013-01-31

申请号：AU2010257266

申请日：2010-12-17

Applicant: SCHWEITZER ENGINEERING LAB INC

Inventor： SCHWEITZER III EDMUND O ,  ANDERSEN LUTHER S ,  BOSOLD MARK J ,  FEIGHT LAURENCE VIRGIL ,  PARK DOUGLAS A ,  TELLER WITOLD R ,  MCMAHON STEVEN A ,  KESLER JAMES R ,  HICKS DONALD C

IPC: G01R21/00

Abstract: Abstract A method of communicating between a radio interface unit and a portable terminal is provided. The radio interface unit has a radio for communicating with the portable terminal by transmitting and receiving radio frequency signals 5 therebetween. The method comprises the steps of: providing a compact communication protocol for communications between the radio interface unit and the portable terminal; providing an extended communication protocol for communications between the radio interface unit and the portable terminal; and using the compact communications protocol as the default communications 10 mode.

公开(公告)号：AU2009293077B2

公开(公告)日：2012-07-19

申请号：AU2009293077

申请日：2009-09-18

Applicant: SCHWEITZER ENGINEERING LAB INC

Inventor： SCHWEITZER EDMUND O ,  SKENDZIC VESELIN ,  DAS DHRUBA P ,  SCHEER GARY W ,  KESLER JAMES R ,  TROUT DOUGLAS M

IPC: H02H3/00

Abstract: An method for automatically testing an arc flash detection system by periodically or continually transmitting electro-optical (EO) radiation through one or more transmission cables electro-optically coupled to respective EO radiation collectors. A test EO signal may pass through the EO radiation collector to be received by an EO sensor. An attenuation of the EO signal may be determined by comparing the intensity of the transmitted EO signal to an intensity of the received EO signal. A self-test failure may be detected if the attenuation exceeds a threshold. EO signals may be transmitted according to a particular pattern (e.g., a coded signal) to allow an arc flash detection system to distinguish the test EO radiation from EO radiation indicative of an arc flash event.

公开(公告)号：NZ556468A

公开(公告)日：2010-10-29

申请号：NZ55646805

申请日：2005-11-30

Applicant: SCHWEITZER ENGINEERING LAB INC

Inventor： SKENDZIC VESELIN ,  KESLER JAMES R

IPC: H01F27/28 ,  H01F5/00 ,  H01F27/30

Abstract: An improved Rogowski coil is formed on a toroidal core made of a thermoplastic or other moldable material, the core having a preferably continuous groove or grooves extending around the core. The grooves correspond in size to magnet wire which registers within the grooves, thus controlling the specific location of the wires. The grooving may be helical. A return loop can be provided for return path cancellation, or a reverse winding can be added in a direction opposite to the direction of advancement of the main coil. In using the return loop, a resistive network can be added to improve the cancellation of the return path due to the effect of geometries. In addition, it can compensate for thermal and other variations.

公开(公告)号：CA2736009A1

公开(公告)日：2010-03-25

申请号：CA2736009

申请日：2009-09-18

Applicant: SCHWEITZER ENGINEERING LAB INC

Inventor： SCHWEITZER EDMUND O ,  SKENDZIC VESELIN ,  DAS DHRUBA P ,  SCHEER GARY W ,  KESLER JAMES R ,  TROUT DOUGLAS M

IPC: H02H3/00

Abstract: An method for automatically testing an arc flash detection system by periodically or continually transmitting electro-optical (EO) radiation through one or more transmission cables electro-optically coupled to respective EO radiation collectors. A test EO signal may pass through the EO radiation collector to be received by an EO sensor. An attenuation of the EO signal may be determined by comparing the intensity of the transmitted EO signal to an intensity of the received EO signal. A self-test failure may be detected if the attenuation exceeds a threshold. EO signals may be transmitted according to a particular pattern (e.g., a coded signal) to allow an arc flash detection system to distinguish the test EO radiation from EO radiation indicative of an arc flash event.