Hi, It depends on if the circuit is "Hazardous Live". Symbol 12 would only be required if the circuit was hazardous live.
6.3.1 is used to determine if something is Hazardous Live, in normal condition. It has three parts, voltage (6.3.1.1), current (6.3.1.2) and capacitance (6.3.1.3). If your voltage is over the limits in 6.3.1.1, then you have to look at current and capacitance. For your example, the voltage is over the limit (60 Vdc). So we have to look at current and capacitance. For Current, the limit is 2 mAdc when using the circuit in A.1 or A.2. If your circuit is only 200 uA, you should be OK, but check. The limit for capacitance is 45 uC charge (Vdc times Capacitance). You will need to measure the capacitance of the circuit. Don't forget that Clause 6.3 requires that you look at normal and single fault conditions (6.3.2) to determine the permissible limits for accessible parts. You will need to verify that the circuit meets the requirements of 6.3.2.1, 6.3.2.2 and 6.3.2.3 during a single fault. Ned Devine Entela, Inc. Program Manager III Phone 616 248 9671 Fax 616 574 9752 e-mail [email protected] -----Original Message----- From: Loop, Robert [mailto:[email protected]] Sent: Tuesday, May 09, 2000 11:30 AM To: [email protected] Subject: EN61010-1 Question Group: A question on interpretation of Clause 6.3.1.1 and 6.3.1.2: If a product has an operator accessible cable that exits the equipment and operates normally at a level of 250 Vdc /200 uA, is it required to be marked with the hazardous voltage label? The cable is a probe where the user (a trained technician) could touch bare metal on the probe operating at the level noted. My thanks to those that respond. Sincerely, Robert Loop Engineering Supervisor Wyle Laboratories Product Safety ph - (256) 837-4411 x313 fax- (256) 721-0144 e-mail: [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] ------------------------------------------- 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]
