Inrush current protection for big toroidal transf ?

nina · 19th April 2006, 03:18 PM

Hello,

A new amp of my friend (Leach amp) uses one big 40-0-40 480VA toroidal with 8x 6,800UF cap. The electricity is 220V, and slow blow 2 Amp (and later 3A) is used.

The problem is the circuit breaker is sometimes automatically cut or the lights/TV (near the power amp) usually dim for a short period when the power amp turn on. I guess it's from the inrush current. Any effective & simple way to solve this issue? Will connecting two CL60s to each of 220V wire for the Class AB amp help? Thanks.

Bazukaz · 19th April 2006, 03:28 PM

Hi,
Watch here :
http://sound.westhost.com/project39.htm

Note that sometimes surge protection devices are sold separately in electronics shops.

Regards,
Lukas.

peranders · 19th April 2006, 03:38 PM

http://home.swipnet.se/~w-50719/hifi/sst01
http://www.hypex.nl/docs/softstart.pdf
http://sound.westhost.com/project39.htm
http://lcaudio.com/index.php?page=12 in the middle of page
http://ampslab.com/inrush.htm

nina · 19th April 2006, 03:40 PM

Thanks for all prompt posts and suggestion.

19th April 2006, 03:18 PM	#1
nina diyAudio Member Join Date: Apr 2005 Location: Earth	Inrush current protection for big toroidal transf ? Hello, A new amp of my friend (Leach amp) uses one big 40-0-40 480VA toroidal with 8x 6,800UF cap. The electricity is 220V, and slow blow 2 Amp (and later 3A) is used. The problem is the circuit breaker is sometimes automatically cut or the lights/TV (near the power amp) usually dim for a short period when the power amp turn on. I guess it's from the inrush current. Any effective & simple way to solve this issue? Will connecting two CL60s to each of 220V wire for the Class AB amp help? Thanks.

19th April 2006, 03:38 PM	#3
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	http://home.swipnet.se/~w-50719/hifi/sst01 http://www.hypex.nl/docs/softstart.pdf http://sound.westhost.com/project39.htm http://lcaudio.com/index.php?page=12 in the middle of page http://ampslab.com/inrush.htm __________________ /Per-Anders (my first name) or P-A as my friends call me

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19th April 2006, 03:28 PM	#2
Bazukaz diyAudio Member Join Date: Nov 2005 Location: Vilnius	Hi, Watch here : http://sound.westhost.com/project39.htm Note that sometimes surge protection devices are sold separately in electronics shops. Regards, Lukas.

19th April 2006, 03:40 PM	#4
nina diyAudio Member Join Date: Apr 2005 Location: Earth	Thanks for all prompt posts and suggestion.

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