Re: Surge protection components - DC line

Amund: It's all about speed. If your network has a slow inductive rise time them use the cheaper MOV. If the little spikes will propagate, as they would in a capacitive network, then use best to use the transorbs. For your 8/20us pulse quoted I'd use the transorbs. Also it may be necessary to add

Re: Surge protection components - DC line

About five years ago STMicro [I think] designed a custom protection device for HP [I think] that was the corollary of a zener, in that it allowed current through up to a value, then kept stopping any increase in current even with voltages over 3KV. I believe it was bipolar processing so could take

Re: Surge protection components - DC line

Amund, For 12V DC and 1kV (40 ohm) surge I prefer transils (STM:SM6T18A) because of lower voltage during surge. I have no experience with 2 ohm surges. Piotr Galka - Original Message - From: Amund Westin To: emc-p...@ieee.o

RE: Surge Protection & EN 60439-1

d hardcopy) of this message and all attachments immediately. -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of John Woodgate Sent: Tuesday, 3 December 2002 10:11 PM To: emc-p...@majordomo.ieee.org Subject: Re: Surge Protectio

Re: Surge Protection & EN 60439-1

I read in !emc-pstc that Kevin Richardson wrote (in ) about 'Surge Protection & EN 60439-1' on Tue, 3 Dec 2002: >Can anyone please advise if EN 60439-1 allows the practice of placing a >surge protection device (eg an MOV) across the mains input (active to earth) >is accepted. >The MOV would pro

Re: Surge protection

In a message dated 7/2/02 5:28:23 AM Eastern Daylight Time, ian.gor...@edwards.boc.com writes: > Do you think it would be acceptable to take a variation of the "TCF route" > whereby we test a smaller power unit egg 2kW to demonstrate compliance of > the design and then make recommendations about

RE: Surge protection

Robert et al I am concerned with a product which is 99% "electromagnetically benign" i.e. it contains no control electronics, other semiconductors or magnetically sensitive components. However, the product is mains powered and thus liable to interference due to voltage surges following lightning s

Re: Surge Protection

In a message dated 12/27/00, Zohar Zosmanovich writes: > I'm concern about designing a proper protection from Surges, applies on > ports for indoor signal lines (E1, Ethernet) at telecommunication centers. > According to ETSI EN 300 386 a surge of 1.2/50 us, 0.5 kV shell be applied > between Tip

RE: surge protection devices

Hi Muriel, I would start with IMHO UL1449 for U.S. and either EN60099-1 or IEC 1051 for Europe Hope this helps Eddie O'Toole ITS -Original Message- From: Muriel Bittencourt de Liz [mailto:mur...@grucad.ufsc.br] Sent: Monday, May 22, 2000 12:13 PM To: Lista de EMC da IEEE Subject: surge

Re: surge protection for ISDN U and S/T

Ok, I got the answer, it is required. Dorababu. > Is longitudinal protection not required for > ISDN circuits at U interface and S/T interface ? > Dorababu > > - > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org