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Showing posts with label IEC. Show all posts
Showing posts with label IEC. Show all posts

September 25, 2013

#Coloured and/or A-B-C-D-P coded #M12 connectors

M12 - #IEC 61076-2-101 #connectors can be supplied with many different key codings to prevent assembly and maintenance mistakes.
Numbers of poles: from 2 up to 17.
Differently coloured connectors are also available to help easy matching, when plugs and sockets are positioned in difficult places for the operator.
M12 Connectors
Plugs and sockets to avoid error assembly.

October 17, 2012

#IEC 60335-1 #Certification for Household Appliances


Shield valves connectors can be supplied with certification
IEC 60335-1 – #household appliances
IEC 60695-2-12 and IEC 60695-2-13 glow wire test

electrovalve socket connectors with certification IEC 60335-1
These connectors conforms to IEC 60335-1

June 25, 2010

#Current-carrying #Capacity. Cable Voltage Drop

Cable choice.
An important element of assessment is the length of the cable. Each meter of the cable causes a voltage drop proportional to the value of the current that runs through it, if cosf = 1 we have: V = IxR.
Max Cable CurrentV = voltage drop, I = current, R = resistance of the cable. In the case of inductive loads (solenoid valves, motors, etc.) or with variable currents, the higher current peak must be considered to avoid even temporary loss of power, which could hinder the proper functioning of the equipment. The longer is the cable, the greater the #voltage #drop, the IEC allows maximum values drop from 3% to 5% of rated voltage. Greater values are admitted only for the current peaks (e.g.: engines starting), if they do not create functioning problems. To minimize the voltage drop the cable section should be increased. Here are some tables that can help to easily calculate the minimum theoretical cable section. See tables 3 and 4 on the page http://www.shield.net/files/catalogue/support/2.2.pdf.
For example, an average continuous current 1 A with section 0,34 mm2 and cable length 10 m generates a voltage drop of 1,3 V, which is approximately 5% of 24 V.