EARTHING AND OVERVOLTAGE PROTECTION ARRANGEMENT
申请公布号:EP1766748(A1)
申请号:EP20050739498
申请日期:2005.05.17
申请公布日期:2007.03.28
发明人:LAAKSO, KARI-MATTI;BERTS, ANDREAS;KUIVALAINEN, JANNE
分类号:H02H9/04;G01R1/36;H02H
主分类号:H02H9/04
摘要:<p>An earthing of an electronic circuit is disclosed in a device belonging to a low-voltage system with, for example, a maximum AC voltage of 1000 V or a maximum DC voltage of 1500 V in which the device is at the main voltage potential or is connected to the main voltage through a high-impedance coupling. An overvoltage protection of the interface between such an electronic circuit and a SELV (Safety Extra Low Voltage) circuit is also disclosed. The neutral point (COM) of the electronic device is coupled to protective earth (PE) through at least one breakdown-based overvoltage protector. The rated breakdown voltage of the overvoltage protector is higher than the voltage present across it in normal operating conditions but lower than the minimum dielectric strength of the component forming the interface between the electronic device and the SELV circuit.</p>
AKUSTISCHES BOHRLOCHMESSGERAET.
TRI-NICKEL-ALUMINID-ZUSAMMENSETZUNG, LEGIERT UM DIE PROBLEME DER HEISSBRUECHIGKEIT ZU UEBERWINDEN.
LUFTFILTERSYSTEM FUER FUEHRERKABINE.
VERFAHREN ZUM RUNDSENDEN VON NACHRICHTEN IN EIN VERTEILTES RECHNERNETZ.
ESTACION DE CORTE DE UNA MAQUINA PARA EL SECCIONADO DE PANELES.
REPAIRING METHOD OF WALL SURFACE
OPTICALLY ACTIVE OXAZOLINE COMPOUND AND LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME
(A) ;AIR SUCTION DEVICE FOR VEHICLE ENGINE
METHOD FOR ADJUSTING NITROGEN CONCENTRATION IN MOLTEN STEEL IN VACUUM REFINING
DIAMETER EXPANDING MACHINE FOR TUBE
ROOT CANAL FILLING COMPOSITION
ELECTROPHOTOGRAPHIC SENSITIVE BODY
FORMINGS- OCH FYLLINGSANORDNING FOER ATT AOSTADKOMMA EN AOTERFOERSLUTBAR PAOSE.