Reclamation Manual: Design and construction, pt. 2. Engineering design: Design supplement no. 2: Treatise on dams; Design supplement no. 3: Canals and related structures; Design supplement no. 4: Power systems; Design supplement no. 5: Field installation procedures; Design supplement no. 7: Valves, gates, and steel conduits; Design supplement no. 8: Miscellaneous mechanical equipment and facilities; Design supplement no. 9: Buildings; Design supplement no. 10: Transmission structures; Design supplement no. 11: Railroads, highways, and camp facilities, Volume 10, Parts 1-2 |
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... auxiliary secondary should be given conductor designations with base designations VX , VÝ , VZ , VG corresponding to the primary and main secondary phases A , B , and C , and a common or ground connection O , respectively . A few ...
... auxiliary secondary should be given conductor designations with base designations VX , VÝ , VZ , VG corresponding to the primary and main secondary phases A , B , and C , and a common or ground connection O , respectively . A few ...
Page 43
... auxiliary power bus . Auxiliary power and field circuits , and control bus . Cabled conductors . Control and instrument transformer circuits and other small wiring . Panel and device outlines , mechanical connec- tions , any non ...
... auxiliary power bus . Auxiliary power and field circuits , and control bus . Cabled conductors . Control and instrument transformer circuits and other small wiring . Panel and device outlines , mechanical connec- tions , any non ...
Page 43
... Auxiliary switch Y B W 52 Closed when main contacts are closed . Closed when main contacts are open .. 강 * Applies to oil and air circuit breakers , contactors , and disconnecting switches . Alarm switch - closed only when main ...
... Auxiliary switch Y B W 52 Closed when main contacts are closed . Closed when main contacts are open .. 강 * Applies to oil and air circuit breakers , contactors , and disconnecting switches . Alarm switch - closed only when main ...
Page 43
... Auxiliary or control relays Relays with one operating coil automatically reset Contact open when coil is de - energized . Contact closed when coil is de - energized . Relays with two coils , i.e. one operating coil and one reset coil ...
... Auxiliary or control relays Relays with one operating coil automatically reset Contact open when coil is de - energized . Contact closed when coil is de - energized . Relays with two coils , i.e. one operating coil and one reset coil ...
Page 6
... AUXILIARY MOTOR OR MOTOR - GENERATOR is used for operating equipment accessories such as pumps , blowers , etc. When auxiliary motors or motor generators are furnished on one equipment for several different accessories , they should be ...
... AUXILIARY MOTOR OR MOTOR - GENERATOR is used for operating equipment accessories such as pumps , blowers , etc. When auxiliary motors or motor generators are furnished on one equipment for several different accessories , they should be ...
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Common terms and phrases
ABCDEFGHIJKLMNOPQRSTUVWXYZ Auxiliary basic symbol Bills of material BOLT BREAKER OR CONTACTOR Brownline Prints BUREAU OF RECLAMATION CAP SCREWS capacitor cathode Chamfer checking print CIRCUIT BREAKER coil CONCRETE conductor conductor designations Conduit CONNECTION SYMBOLS construction drawings Contact closed Current transformer dams DENVER detail wiring diagrams DIAGRAM SYMBOLS Cont'd dimensions DRAWN TRACED duct ELECTRICAL DEVICE NUMBERS ELECTRICAL DRAFTING STANDARDS ELECTRON TUBE equipment FINISH MARKS FORMERLY heater holes inches indicates INSTRUMENT TRANSFORMER INTERIOR BUREAU lamp lettering LIGHTING WIRING DIAGRAM lines load machine MAP SYMBOLS meter motor NOTES ozalid ozalid process Phase photostat PIPE PLAN ELEVATION plug receptacle polarity position Potential transformer power plant PROFILE RECLAMATION MISSOURI RIVER reclosing reproduced tracing resistor ring seal SCALE OF FEET SECTION shown shunt SOCKET SUPERSEDES DWG surface switchboard SYMBOLS Fig terminals thread length tripping Typical UNITED STATES DEPARTMENT Valve voltage Voltage regulator weld WIRING DIAGRAM SYMBOLS Δ Δ
Popular passages
Page 3 - ... functions to allow only a specified number of operations of a given device, or equipment, or a specified number of successive operations within a given time of each other. It...
Page 2 - ... a machine and prevent its restarting if the control does not properly complete a predetermined sequence. (49) AC. Thermal Relay is a thermal device which functions when the temperature of ac. apparatus controlled tends to decrease below or increase above the safe operating value. (50) Short Circuit Selective Relay is one which functions on excessive rate of rise of current and may further allow reclosing only after normal conditions have been re-established. (51) AC.
Page 24 - TYPE ARE OF SAME SIZE UNLESS OTHERWISE SHOWN. 3. SYMBOLS APPLY BETWEEN ABRUPT CHANGES IN DIRECTION OF JOINT OR AS DIMENSIONED (EXCEPT WHERE ALL AROUND SYMBOL IS USED). 4. ALL WELDS ARE CONTINUOUS AND OF USER'S STANDARD PROPORTIONS, UNLESS OTHERWISE SHOWN.
Page 4 - ... circuit, or to switch a space heater in circuit, or to switch a light, or regenerative, load resistor of a power rectifier or other...
Page 5 - ... 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. (92) Dc Voltage and Current Directional Relay is one used to give indication to close a circuit when the voltage exceeds a certain amount in a given direction, and to give the indication to open this circuit when the current exceeds a certain amount...
Page 3 - Reserved for future application. (57) Current Regulating Relay is one which functions to hold the value of current between given limits. (58) Voltage Regulating Relay is one which functions to hold the value of voltage between given limits. (59) Ac Overvoltage Relay is one which functions on a given value of ac overvoltage. (60) Voltage Balance Relay is one which indicates, or functions to hold, a given voltage difference between two sources of voltage. (61) Current Balance Relay is one which indicates,...
Page 1 - ... or load limiting resistors has been reached. (29) Isolating Circuit Breaker, Contactor or Switch is a device used for completely disconnecting one circuit from another, generally during emergency operation or test. (30) Annunciator Relay is a non-automatic-reset device which gives individual visual indications upon the functioning of lock-out protective devices, and may also be arranged to perform the lock-out function in the master control circuit. (31) Separate Excitation Device is one which...
Page 24 - In plan or elevation, near, far and both sides locations refer to nearest member parallel to plane of drawing and not to others farther behind. 2. In section or end views only, when weld is not drawn, the side to which arrow points is considered near side. 3. Welds on both sides are of same size unless otherwise shown. 4. Symbols govern to break in continuity of structure or to extent of hatching or dimension lines. 5.