Page 1
GEH-15398 . INSTRUCTIONS Supmedes GEH-1539A TYPES AB AND DB AMMETERS AND VOLTMETERS ---- GENERAL ELECTRIC...
Page 2
FRONT SIDE BACK I" MOUN TING STUD / 48· 36 T HO . I " 21"_j _ ; 1" LMO UNTI NG N UT ,..._ 16 2 .. · · ' - GROUNDING STUD i" f--- *PRESENT ON A-C VOLTMETERS ONLY #6-40 "...
TYPES AB-10*-11*-13* -14 -15*-16 -18 -1 9 * · -· -19 * DB-1 0;-12; -1 3:-14,-15:-16 , -18, AMMETERS AND VOLTMETERS INTRODUCTION sulation. The current transformer must have a fre quency rating which corresponds to that indicated on These instructions cover the installation of the the instrument nameplate.
GEH-15398 Types AB and DB Ammeters and Voltmeters dimensions of the external resistors are given in Fig. scale millivolts (marked FULL SCALE MV) on the 10, 11, and 12. instrument nameplate. Loosen the lock nut (located under the nameplate), and turn the rheostat shaft D-C AMMETERS (which projects through the nameplate) until the D-e ammeters designed for current measurement...
Installation GEH-15398 numbers. For such instruments, the connection dia PRINCIPLES OF OPERATION grams in this book may be followed by observing the pictorial positioning of the terminals, rather than the The d-e instruments utilize a permanent-magnet, stud markings. moving-coil mechanism adapted for the longscale in Warning: Care must be exercised in handling high strument design.
Page 6
GEH-15398 Types AB DB Ammeters Voltmeters SIDE BACK FRONT �- MOUNTING " STUD THO. USE AS GROUNDING STUD WHEN REQUIRED NOTE: THE LETTERS NEXT TO THE • TERMINAL STUDS ARE FOR PURPOSES PRESENT ONLY ON A-C VOLTMETERS {EXCEPT EXPANDED SCALE) OF DIMENSIONAL LOCATION ONLY.
Page 7
Dimensions GEH-15398 FRONT SIDE BACK � ·t USE AS GROUNDING STUD IN � ACCORDANCE WI TH EXTERNAL � CONN ECTION DIAGRAM - 1. 1 5' NOTE THE LE TTERS NEXT TO THE • TERMINAL STUDS ARE FOR PURPOSES 2 1 " 3"...
Page 8
Types AB DB Ammeters Voltmeters GEH-15398 FRONT SIDE PANEL f-ze THD �· NOTE THE LETTERS NEXT TO THE TERMINAL STUDS ARE FOR PURPOSES OF DIMENSIONAL LOCATION ONLY FOR CONNECTIONS, SEE THE APPROPRIATE EXTERNAL CONNECTION DIAGRA M. *PRESENT ONLY ON A-C VOLTMETERS (EXCEPT EXPANDED SCALE) RATED 150 VOLTS OR BELOW DIMENSIONS STUD...
Page 10
Types AB DB Ammeters Voltmeters GEH-15398 SOURCE SOURCE SOURCE LOAD a m m e t e r Fig. 21. A-c amm e t e r Fig. 20. Sell-contained Fig. 22. A-c a-c ammeter. (Types AB-1 0 , - 12, (Types AB-14, -15, -16 , -1 8, only) with current...
Page 11
GEH-7 5398 Shunts FORM -15 , 50-MILLIVOLT SHUNTS DIMENSIONS IN INCHES Connection --- - ---- -- - -- - -- - -- - -- - Stripe No .29 Fia. Each End · � 2 i).i '-12 � 5� · � 2 �...
WHEN YOU NEED SERVICE YO.U NEED REPAIR, recondition, or rebuild ony electric apparatus, a G-E service shop near you is available day and mght, seven days a week, for work in the shops or on your premises. latest factory methods and genuine G-E renewal parts are used to maintain the original performance of your G-E equipment.