http://www.eurolaite.fi/ - dileri elektroopremom, ( wic1 reley i transformatori )

http://www.dsfweb.com/ - wic1 dileri

http://www.eaton-info.eu/de/datacentres/consultants/docs/Xiria_app_notes.pdf

http://www.egeprestij.com.tr/

http://www.metix.bg/files/safeplus.pdf

http://www.eim.com.ua/home/

http://www.smart-ring.se/eng/Smart-Ring/Protection-Relay

http://www.eskom.co.za/Pages/Landing.aspx

http://avkltd.co.uk/seg-power-protection-news/item/123-wic-1

http://uk.farnell.com/

http://www.gepowercontrols.com/eu/