Switchboard Instrument
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
Switchboard Instrument
a measuring instrument that is designed to be mounted on, for example, a traffic-control panel, a control console, a control switchboard, or a cabinet of an
Figure 1. A switchboard voltmeter
electrical installation. A switchboard instrument may be an indicating instrument or a recording instrument. As a rule, switchboard instruments have a low class of precision, usually 1.0–5.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.