Mel We at Cutler-Hammer design/manufacture meters for power distribution gear at the medium to low voltage level (note low voltage is 208 to 480 Line to line). Typically as distribution gear for commercial or industrial buildings, not residential.
>From your comments it sounds like you are focusing on the US market. We have evaluated our meters in the past to UL508 which is for industrial controls. Now with European requirements we are starting to use UL3111 for "Measurement, Control and Laboratory Equipment". The nice thing about UL3111 is that it has parity with European EN61010 (based on IEC 1010-1) and also CSA 22.2.1010. So you get three for the price of one! Note also that EN61010 is a harmonized standard in Europe and therefore safely satisfies the Low Voltage Directive. Another popular European safety standard is EN60950 for Information Technology Equipment. It also has UL1950 and CSA 22.2.950 parity and is harmonized. The scope of this standard includes commercial and industrial applications. Also EN60950 and EN61010 have cross references partially accepting components recognized in one for use within applications based in the other. Both standards are cleanly written and are understood by the majority of safety test labs. In EN60950 there is a section on telecommunications. It refers to data links that leave the building like your anttena needs to do. I do not think it talks about RF communication specifically. This section does address isolation but it requires you to evaluate several issues to determine at what level your isolation barriers must be tested to. Your relationship to mains - isolation barrier wise The pollution degree - clean room, dust contamination, corrosive atmosphere etc. Your housing intentions - outdoors, indoors, metal enclosure etc. Your choice of isolation barriers between safety extra low voltage circuits (user can touch) and hazardous circuits - Your voltage levels and choice of isolation barriers before the antenna relative to mains for example. I would recommend you get a copy of both EN60950 and EN61010-1. You may have to study them but I think you will find most of your answers there. Note that EN60950 is more restrictive than EN61010-1 but has lots of recognition world wide. Sorry but I don't know about your ANSI standard. Note that there are also European standards for watt hour meters but these are very specific instruments for revenue metering, like the circular meters found on residential and some commercial applications. You may have to study your application to be sure where your product lies. Sounds like a job for marketing hope this helps Chris Wells Sr Des. Eng. Cutler-Hammer [email protected] ------------- Original Text From: C=US/A=INTERNET/DDA=ID/mpedersen(a)midcom.anza.com, on 5/14/97 5:49 PM: See attached files.
