DIN EN 60309-4-2012 工业用插头、插座和连接器.第4部分:有或没有互锁的开关插座和连接器.(IEC 60309-4-2006,修订版+A1-2012).德文版本EN 60309-4-2007+A1-2012
Plugs, socket-outlets and couplers for industrial purposes - Part 4: Switched socket-outlets and connectors with or without interlock (IEC 60309-4:2006, modified + A1:2012); German version EN 60309-4:2007 + A1:2012