Bob, The standard (in the definitions section) only says that the ground plane "is used as a common reference for the magnetic field generator and the auxiliary equipment", but I suspect that safety is a major reason for it being used. Without a good ground reference there is a possibility that dangerous potential differences could be created by the very strong power-frequency magnetic fields used. Naturally, the GRP must be of non magnetic material to prevent it from shunting some of the magnetic flux.
Scott Lacey -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of [email protected] Sent: Friday, June 16, 2000 10:32 AM To: [email protected] Subject: 61000-4-8 Ground Plane Can someone explain to me why a ground plane is required in the test setup for EN 61000-4-8 (power frequency magnetic fields)? Thanks, Bob Heller 3M Company ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
