Barry, In my company we have occasionally tried to use large capacitance to earth but we not only had the "Y" cap value problem but also increased ground leakage current to unsafe levels. How are you dealing with the leakage issues? Are you trying to solve an EMC noise problem? -doug ======================================= Douglas E. Powell Regulatory Compliance Engineer Advanced Energy Industries, Inc. 1625 Sharp Point Dr. Fort Collins, Colorado 80525 USA m/s: 2018 --------------------------------------- 970-407-6410 (phone) 970-407-5410 (e-fax) 800-446-9167 (toll-free) mailto:[email protected] http://www.advanced-energy.com =======================================
-----Original Message----- From: BarryM [mailto:[email protected]] Sent: Thursday, January 13, 2000 12:03 PM To: [email protected] Subject: Capactitors to Ground Hello all, I'm looking for any standards / decisions / interpretations, etc... that discuss the use of capacitors to ground in industrial, fixed, permanently connected equipment. We have a 3 phase, 400V product that requires a significant amount of capacitance to ground, and the use of available "Y" rated capacitors is burdensome in that it would take a lot of them. We're aware of leakage current issues, and are well within the 5% allowance (EN50091-1-1, which references EN60950 for most core requirements). We are using about 1.3-2uf from each phase to ground. UL and CSA both do not require "y" type capacitors in this class of product, I'm hoping there is a similar rationale in Europe. Thank you in advance for any comments you may have, Barry Marks --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
