Prices depend on the design: Some contain coupling and backfilter elements for 4 lines plus circuitry to allow coupling using either capacitors (still the preferred method in 61000-4-5) or arrestors. They also allow the addition of clamps of various levels to reduce or eliminate surges back to the auxillary equipment that is driving the line to be tested. Biasing of the clamping diodes allows virtually any clamping level.... Several resistor networks are also included to allow coupling to either 2 or 4 lines and still maintain the required 25 ohm loading for the 10/700us waveform and the 40 ohm loading required for the 1.2/50us waveform. A coupler like this is $5200 USD. Others contain a simple 0.5uF capacitor and a few resistors -- this coupler is available for about $1k. You get what you pay for. If anyone wants more details, let me know... and I'll answer outside the PSTC....
Best Regards, Michael Hopkins Manager, EMC Technologies Thermo Electron Control Technology Division EMC & ESD Simulation Solutions One Lowell Research Center Lowell, MA 01852 Tel: +1 978 275 0800 ext. 334 Fax: +1 978 275 0850 [email protected] One Thermo, committed to integrity, intensity, innovation & involvement From: Bailey, Jeff [mailto:[email protected]] Sent: Friday, September 19, 2003 9:42 AM To: [email protected] Subject: RE: SURGE testing, disturb. meas. This subject is also close to the top of my list of things to investigate... I've recently priced out a "professional" coupling network and to my surprise it weighed in with a hefty 10k (canadian) price tag. Does anyone have any reference designs for their own home grown solutions that they would be willing to share, or suggestions for manufacturers of surge coupling networks that may be more reasonably priced? I just have a hard time beleiveing that a passive surge coupling unit could be anywhere near ten thousand dollars complex... Thanks, Jeff Bailey Compliance Engineering Woodhead Software & Electronics Phone: (519) 725 5136 ext. 363 Fax: (519) 725 1515 email: [email protected] Web: www.mysst.com -----Original Message----- From: Konrad Stefanski [mailto:[email protected]] Sent: September 19, 2003 3:20 AM To: [email protected] Subject: SURGE testing, disturb. meas. Hello list. What is the simplest way to couple Surge pulses (EN 61000-4-5) with telecomunication lines? I haven't got proffesional coupling network. And the second question, what is the simplest way to measure voltage of disturbances from telecomunication lines without proffesional ISN? Thank You for answers. Konrad Stefanski PCBC SA Warsaw [email protected]
