RE: Surge to 4Kv
You're right, Gary. ITU K.20 (I believe) specifies testing of telecom ports connected to the network. The test levels are 1.5kV if primary protection is present, 4.0 kV if not. The waveform is 10 x 700. CISPR 24 actually references these test levels in Table 2.. One of the European common modifications replaced these test levels with 500V of the 1.2 x 50 waveform. John P. Wagner AVAYA Communication 1300 W. 120th Ave, Room B3-D16 Phone/Fax: (303) 538-4241 johnwag...@avaya.com > -- > From: Gary McInturff[SMTP:gary.mcintu...@worldwidepackets.com] > Reply To: Gary McInturff > Sent: Monday, February 12, 2001 11:29 AM > To: EMC-PSTC (E-mail) > Subject: Surge to 4Kv > > > The last information I have is that EN55024:1998, which becomes > effective very soon still only identifies surge test of 2Kv line to > ground, > but I have a persistant buzzing in my ear from a single source that is > claiming it actually requires 4Kv for the surge test. > Has anyone else heard of a change to 4 Kv, - maybe ETSI? > Except for the Generic heavy industrial 50081-2 - which doesn't > apply to ITE equipment very often, I have not seen this 4 Kv level. I > would > appreciate a sanity check. > Thanks > Gary > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson:pstc_ad...@garretson.org > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > > --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: Surge to 4Kv
ETS 300 386-2 requires a performance criteria R surge of 4kv Line-Ground for "other than telecommuncations centres, ac power ports" (Section 5.2.4.8). Keep in mind this standard only applies to Telecommunication Network Equipment, so depending on what you make, this may be irrelevant. Dave Heald Andrew Carson wrote: > > Gary > > EN55024:1998 , well at least my copy, also gives 2kV line to ground as the > surge voltages. Your persistent buzzing may be coming form the reference test > standard EN61000-4-5. It gives various surge voltages depending on the > Installation Class of the equipment. > > Class 3 - Electrical Environments where cables run in parallel ( The one > generally used for IT equipment installations) requires the 2kV surge. > > but > > Class 4 - Electrical environments where the interconnections are running as > outdoor cables along with power cables, and cables are used for both > electronic > and electric circuits. Requires a 4kV surge. > > Both classes have a fully explanation in the body of the text, so you may want > to check the full definitions. Personally I have not seen many pieces of ITE > or > component power supplies that can take a 4 kV surge and remain functional. > > Gary McInturff wrote: > > > The last information I have is that EN55024:1998, which becomes > > effective very soon still only identifies surge test of 2Kv line to ground, > > but I have a persistant buzzing in my ear from a single source that is > > claiming it actually requires 4Kv for the surge test. > > Has anyone else heard of a change to 4 Kv, - maybe ETSI? > > Except for the Generic heavy industrial 50081-2 - which doesn't > > apply to ITE equipment very often, I have not seen this 4 Kv level. I would > > appreciate a sanity check. > > Thanks > > Gary > > > > --- > > This message is from the IEEE EMC Society Product Safety > > Technical Committee emc-pstc discussion list. > > > > To cancel your subscription, send mail to: > > majord...@ieee.org > > with the single line: > > unsubscribe emc-pstc > > > > For help, send mail to the list administrators: > > Jim Bacher: jim_bac...@mail.monarch.com > > Michael Garretson:pstc_ad...@garretson.org > > > > For policy questions, send mail to: > > Richard Nute: ri...@ieee.org > > -- > > Andrew Carson - Product Safety Engineer > Xyratex Engineering Laboratory > Tele 023 92496855 Fax 023 92496014 > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson:pstc_ad...@garretson.org > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: Surge to 4Kv
Gary EN55024:1998 , well at least my copy, also gives 2kV line to ground as the surge voltages. Your persistent buzzing may be coming form the reference test standard EN61000-4-5. It gives various surge voltages depending on the Installation Class of the equipment. Class 3 - Electrical Environments where cables run in parallel ( The one generally used for IT equipment installations) requires the 2kV surge. but Class 4 - Electrical environments where the interconnections are running as outdoor cables along with power cables, and cables are used for both electronic and electric circuits. Requires a 4kV surge. Both classes have a fully explanation in the body of the text, so you may want to check the full definitions. Personally I have not seen many pieces of ITE or component power supplies that can take a 4 kV surge and remain functional. Gary McInturff wrote: > The last information I have is that EN55024:1998, which becomes > effective very soon still only identifies surge test of 2Kv line to ground, > but I have a persistant buzzing in my ear from a single source that is > claiming it actually requires 4Kv for the surge test. > Has anyone else heard of a change to 4 Kv, - maybe ETSI? > Except for the Generic heavy industrial 50081-2 - which doesn't > apply to ITE equipment very often, I have not seen this 4 Kv level. I would > appreciate a sanity check. > Thanks > Gary > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson:pstc_ad...@garretson.org > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org -- Andrew Carson - Product Safety Engineer Xyratex Engineering Laboratory Tele 023 92496855 Fax 023 92496014 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
