 | National Electrical Manufacturers Association - Electric switchgear - 1927 - 140 pages
...a certain amount in a given direction. (92) DC. Voltage and Current Direc124-509 (Continued) tional Relay is one used to give indication to close a circuit...exceeds a certain amount in the reverse direction. (93) Field Changing Contactor or Relay is one which functions to change the amount or source of excitation... | |
 | National Electrical Manufacturers Association - Electric apparatus and appliances - 1928 - 372 pages
...dc. voltage exceeds a certain amount in a given direction. (92) DC. Voltage and Current Directional Relay is one used to give indication to close a circuit...exceeds a certain amount in the reverse direction. (93) Field Changing Contactor or Relay is one which functions to change the amount or source of excitation... | |
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... power circuit. (90) Voltage Regulator is a device which serves primarily to hold the voltage at a certain value or within certain limits. (91 ) Dc Voltage Directional Relay functions when the dc voltage exceeds a certain amount in a given direction.... 