Courtesy of NationalSwitchgear.com
Страница 1: ...condary circuits to the instrument case Use No 12 Awg copper wire Ground connections in accordance with the National Electric Code A C AMMETERS TYPE AB When the circuit exceeds 30 amperes or 650 volts a current transformer of the ratio indicated on the nameplate must be used and instrument scale will be marked in primary amperes D C AMMETERS TYPE DB D c ammeters for current measurement above 60 am...
Страница 2: ... of instrument and adjust rheostat until the instrument reads full scale Replace protective cap after completing ad justment A C VOLTMETERS TYPE AB When the circuit exceeds 750 volts a potential transformer of the ratio in dicated on the instrument nameplate must be used and the instrument scale will be marked in primary volts D C VOLTMETERS TYPE DB D c voltmeters designed for use on circuits abov...
Страница 3: ...ANEL TERMINAL STUDS 20 THREAD TOP T 4 11 DIA D x IEW OR SACK SHOWING TERMINAL LOCATIONS 38 a 8 3 87 THIS TERMINAL FOR USE WITH DOUBLE RATED INSTRUMENTS ONLY Dimensions Types DB 30 and 40 Ammeters and Voltmeters Fig 3 TERMINAL STUDS 1 4 2 8 THREAD j 4 MOUNTING STUDS 1 4 28 THREAD y PANEL 1 I T r rxrTTXx 29 p vA o 64 19 f 4 S4 i i jXP 5 31 3 i t DIA H 32 32 b j i o m v 3 J 32 1 J4l fv 64 e 23 r THIS...
Страница 4: ...32 THREAD T 4 MOUNTING STUDS 1 4 28 THREAD USE ON VOLTMETERS i i THESE TERMINALS FOR USE WITH DOUBLE RATED AMMETERS ONLY PAH6L 0 2 i o M A 3 3 0 FOR AMMETERS A 4 9 16 FOR VOLTMETERS Id 3 5 VIEW OF BACK SHOWING TERMINAL LOCATIONS r i 0VCMU WIDTH T Dimensions o Type AB 16 Ammeters and Voltmeters Fig 6 9 L 3 37511 f 1 608 0 015 0 015 PANEL f ffi O 1 i V N H 4 ADAPTER MOUNTING STUD FOR PANELS OVER 9 1...
Страница 5: ...rs Fig 10 External con nections of double rated a c altimeters Fig 11 External connections of double rated a c ammeters with current transformer SOURCE SOURCE SOURCE SQURCE L 3E txUSUp X 9 SHUNT r LOAD SELF CONTAINED LOAD WITH EXTERNAL SHUNT LOAD HIGH RATING LOAD LOW RATING Fig 13 External connections of double rated d c ammeter DB 40 41 only Fig 12 External connections of d c ammeters SOURCE FUSE...
Страница 6: ...Fig 19 External connections of d c ground detectors Fig 18 External con nections of double rated d c voltmeters Fig 17 External connections of d c voltmeters 5 h 9 6 10 32 THO 2 8 I TUBE V e 8 i 9 r 6 Fig 20 Form 3 resistor single tube 750VAC 15 30VAC 300 600VAC 29 9 8 32 W 10 32 THO i L W 21 1 44 3 32 8 1 3 r J 16 2 TUBES C 3 8 8 Formas resistor two tubes 150 600VAC Fig 21 INSTRUMENT PRODUCTS OPE...
