Analog Switchboard Meters - ANSI C39.1
Analog Switchboard Meters - ANSI C39.1
(OP)
Hi,
I am trying to replace an old analog voltmeter installed in a synch panel. The reason for doing so is that the ratio of the VT connected to this device has changed. I would like to replace it by another one as similar as possible to the original.
Going through different catalogs of analog meter manufacturers, I have found references to "AB-14" & "AB-40" meter types which appear to refer to analog meter classes described in ANSI C39.1 (I could be wrong though). Anyone could let me know what are the differences between AB-14 and AB-40 meters? Any reference on the internet with info on this subject?
I upload a picture of the voltmeter I am replacing. It is the 0-15kV on the bottom left.
Thank you very much in advance for your help.
I am trying to replace an old analog voltmeter installed in a synch panel. The reason for doing so is that the ratio of the VT connected to this device has changed. I would like to replace it by another one as similar as possible to the original.
Going through different catalogs of analog meter manufacturers, I have found references to "AB-14" & "AB-40" meter types which appear to refer to analog meter classes described in ANSI C39.1 (I could be wrong though). Anyone could let me know what are the differences between AB-14 and AB-40 meters? Any reference on the internet with info on this subject?
I upload a picture of the voltmeter I am replacing. It is the 0-15kV on the bottom left.
Thank you very much in advance for your help.
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RE: Analog Switchboard Meters - ANSI C39.1
We specified hundreds of AB-40s, never an AB-14. As you may know, GE sold this product line to Yogogawa many years ago, and now Yogogawa no longer makes them. Crompton may still make a look-alike. Weschler still makes a clone of the old Westinghouse style of panel meter the last time I checked.
The old AB-40 meters were wonderfully durable, in my experience. You might check for old-stock Yogogawa or even used on e-bay. Bear in mind that you'll have a PT input of maybe 120 V and the scale must match what you have. The dials were hand marked based on actual test voltage or current, so each one is kind of a one-off. If it looks like a GE meter, I'd check with Crompton. http://www.cromptonusa.com/switchboard.html
RE: Analog Switchboard Meters - ANSI C39.1