Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 197
he following changes:The permanent magnets are re-placed by four electromagnetsastatically arranged. Magneticcontrol is used instead of springcontrol. These instruments beingastatically arranged are notaffected by stray fields even of verygreat magnitude. The strengthof the field and the strength… … 174 SWITCHBOARDS 77 They are naturally more expensive than the straight DArsonvalinstrument, but have a very marked advantage in some situations. These instruments, when built as ammeters, operate from shunts.The voltmeters are the same as ammeters, but are connected througha resistance across the…
Electrical engineering
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