GEH 1539C

GEH 1539C
INSTRUCTIONS
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GEH-1539C
SupemdeJ GEH-1539B
TYPES AB AND DB
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AMMETERS AND VOLTMETERS
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GENERAL
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FRONT
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BACK
MOUNTING STUD
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NOTE'
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THE LETTERS NEXT TO THE
TERMINAL STUDS ARE FOR PURPOSES
STUD
LOCATION
INSTRUMENT
Type
DB-10
DB-10
Ammeter
AB
Voltmeter
Type D8-10 Ground Detector
Type
Type
AB-10
AB-10
Fig. J.
FRONT
CD
DIMENSIONS
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3
15/32"
2
31/32"
3
15/32"
2
31/32"
3 15/32"
2
31/32"
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Type
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OF DIMENSIONAL LOCATION ONLY. FOR
CONNECTIONS, SEE THE APPROPRI ATE
EXTERNAL CONNECTION DIAGRAM.
CD
Ammeter
A8
"
Voltmeter
A8
"' 3/8"
3/8"
3
7/8"
3 7/8"
Dimensions of Types AB- 10 and DB- 10 ammeters and voltmeters
and DB- 10 ground detectors.
MOU N TI NG
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BACK
SIDE
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PANEL
3"
32
GROUNDING
#6-40
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"'PRESENT ON VOLTMETERS
-13,
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FIG. 2. DIMENSIONS OF TYPES AB-12 AND
AND TYPES DB-12
AMMFTERS, VOLTMETERS AND GROUND DETECTORS.
INSTRUMENT
AND -1,
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2
D-e
A-c
A-c
Fig. 2.
Voltmeters
NOTE:
THE LETTERS
NEXT TO THE
TERMINAL STUDS ARE FOR PURPOSES
OF DI�ENSIONAL LOCATION ONLY FOR
CONNECTIONS, SEE THE APPROPRIATE
EXTERNAL CONNECTION DIAGRAM
DIMENSIONS
STUD
LOCATION
D-e Ammeters
D-e
STUD
TAP
X
AB
Ground Detector
Ammeters
AB
Voltn1eters
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3
1/2"
3
1/2"
2
31/32"
1/2"
2
31/32"
CD
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4
2
31/32"
13/32"
3 7/8"
13/32"
3 7/8"
Dimensions of Types AB- 12 and -13, and Types DB- 12 and - 13 ammeters,
voltmeters, and ground detectors.
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TYPES
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AB-10;-12:-1J:-14,-1S:-16,-18, AND -19*
AND
DB-10:-12;-1J:-14,-1S:-16,-18, AND -19*
AMMETERS AND VOLTMETERS
INTRODUCTION
sulation. The current transformer must have a fre­
d-e ammeters and voltmeters. These instruments are
long-scale, rectangular-pattern, switchboard types de­
plied, are intended for use on the circuit specified by
the customer.
There is a nameplate located on the back of each
instrument. This nameplate gives the serial number
and such information on the current or voltage rating,
frequency rating, transformer ratio, full-scale value,
and lead resistance as is applicable to the instrument.
On voltmeters, the nameplate also indicates whether
the resistor is internal or external.
VOLTMETERS
When the circuit exceeds 750 volts, a potential
transformer of the ratio indicated on the instrument
nameplate must be used. The transformer must have
a frequency rating which corresponds to that on the
instrument nameplate.
An external Form-3 resistor must be used when so
indicated on the instrument nameplate. The table
below gives the number of tubes in the resistor sup­
plied
same serial number as that of the instrument. The
peres or primary volts respectively, unless otherwise
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A-C AMMETERS
When the circuit exceeds 20 amperes, a current
transformer of the ratio indicated on the nameplate
must be used. When the circuit exceeds 650 volts a
current transformer must be used for purposes of in-
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EXTERNAL RESISTORS
Description
mers will have their scales calibrated in primary am­
specified.
voltage ratings.
of various
with instruments
When an external resistor is used, it must bear the
Ammeters and voltmeters supplied with transfor­
Volts
External Resistor
Single· range
Single-range
Single-range
150
175, 300
350
Single-range
500
Single-range
Double-range
Double-range
600, 750
75/150
150/300
None
One 1-tube
One 1-tube or
2-tube
One 4-tube or
2- tube
One 4-tube
None
One 1-tube
''' Discontinued type; no longer available
TYPE
Voltmeters (150-volt rating)
I
Impedance
in Ohms
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3020
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0.086
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BURDEN DATA
Effective
Resistance
in Ohms
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Inductance
in Henries
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Volt-amperes
120-volt, 60-cycle Potential Circuit
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2960
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0.05
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1.52
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0.000187
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4.76
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2.15
s ..ampere, 60-cycle Current Circuit
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Watts
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Vars
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4.67
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0.94
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1.25
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1.78
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Power Factor
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0.98
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0.58
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Ammeters
These instructions do not purport to cover all details or variations in equipment nor to provide for every possible
contingency to be met in connection with installation, operation or maintenance. Should further information be desired
or should particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter should
be referred to the General Electric Company.
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the instrument nameplate.
A-C
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signed for flush mounting. The instruments, as sup­
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These instructions cover the installation of the
General Electric Types AB and Types DB a-c and
quency rating which corresponds to that indicated on
3
Types AB and DB Ammeters and Voltmeters
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GEH-1539C
dimensions of the external resistors are given in Fig.
scale millivolts (marked FULL SCALE MV) on the
10, 1 1, and 12.
instrument nameplate.
D-e ammeters designed for current measurement
above 60 amperes necessitate the use of shunts which
are to be connected to the ammeter by means of the
In the event that leads are supplied
by the purchaser, their resistance should agree with
the value stamped on the instrument nameplate.
Any
change in the resistance of these leads will introduce
Retighten the lock nut.
Note: The maximum lead resistance is about 1 ohm
for a 100-millivolt instrument and about 0.26 ohm for
a 50-millivolt instrument.
D-C VOLTMETERS
D-e voltmeters designed for use on circuits above
General Electric shunts of
750 volts and d-e ground detectors for voltages up to
the same ampere rating and millivolt drop are inter­
and including 750 volts are furnished with external
changeable.
Warning: All ammeter shunts should be connected
in the grounded side of the line when possible.
When
this is not possible, or the circuit cannot be grounded,
the metal parts of manually operated contact devices
or auxiliary pointer knobs which project through the
cover are at line potential.
resistors and are connected directly to the circuit to
be measured.
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an error in the reading.
(which projects through the nameplate) until the
ammeter reads full scale.
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D-C AMMETERS
leads provided.
Loosen the lock nut (located
under the nameplate), and turn the rheostat shaft
INSTALLATION
MOUNTING
The appropriate dimension drawings shown in this
ed, also remember that the instrument windings, as
book should be followed when drilling the switch­
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When the cover is remov­
well as the scale and pointer, are at line potential.
board.
Use caution to avoid contacting this potential.
should be completed before mounting the instruments.
As the resistance of the shunt leads used in certain
All drilling and all wiring on the switchboard
Supporting studs are provided for mounting on the
applications cannot be predetermined at the factory,
switchboard.
it has been found desirable to furnish some d-e am­
tion.
meters with an internal rheostat to adjust for non­
These instruments are practically uneffected by
stray fields, but it is advisable to keep transformers
standard lead resistances.
The nameplate on the instrument has an INSTRU­
MENT
Mount the instruments in a level posi­
+ LEAD RESIS. value stamped upon it.
and wires carrying heavy current as far as possible
from all indicating instruments.
This value is to be that of the total circuit, which is
When there is no current flowing thrGugh the in­
considered to include the resistance of the instrument
strument and it is properly leveled, the pointer should
and its leads with the shunt disconnected.
This total
circuit resistance must be adjusted correctly in order
to attain the specified accuracy of the instrument.
To adjust the rheostat for a given lead resistance,
proceed as follows:
indicate zero.
Any deviation from zero should be
corrected by means of the zero adjustor.
TERMINAL CONNECTIONS
The threads on the terminal studs and nuts should
If a resistance bridge is available, connect it across
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the shunt end of the leads (shunt disconnected) and
the instrument across the opposite end.
Set the re­
sistance bridge for the INSTRUMENT
+
LEAD
be clean and bright.
The contact surfaces of nuts,
busbars, and cable terminals must be thoroughly clean
to insure good contact.
If a nut turns hard, it should
be run over a tap of the proper dimensions; otherwise,
RESIS. value stamped on the instrument nameplate.
the threads on the stud may be ruined or the stud
Loosen the lock nut (located under the nameplate),
turned in the instrument, thereby breaking the con­
nection.
tighten the nuts sufficiently to insure good contact.
the bridge galvanometer.
Do not overtighten.
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and turn the rheostat shaft (which projects through
the nameplate) until a zero deflection is secured on
After the correct setting
After the instrument has been connected,
The nuts and studs used in these instruments are
has been obtained, retighten the lock nut.
If a resistance bridge is not available, adjustment
may be made by connecting a standard millivoltmeter
U. S. standard.
Connect the instrument as shown in the appropriate
diagram.
and the instrument across the opposite end.
correspond to the numbers stamped on the instrument
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across the shunt end of the leads (shunt disconnected)
Apply
a low adjustable d-e voltage across the shunt end
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of the leads and adjust this voltage until the indication
on the standard millivoltmeter agrees with the full-
The numbers in these connection diagrams
terminals.
On instruments manufactured prior to
195 1, the
terminal studs are stamped with letters instead of
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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.
ing coil produces a magnetic field which interacts
circuits.
with the field produced by the permanent magnet,
thus supplying the deflecting torque.
POLARITY MARKINGS OF TRANSFORMERS
and X1
The moving
system deflects until counterbalanced by the instru­
The a-c instruments
( except expanded-scale volt­
In these instruments, three
ment control springs.
Transformers of present manufacture have polarity
markings of white paint or markers, H 1
meters ) employ a moving iron mechanism of the at­
for primary
for secondary, on or near the proper terminal.
These markings denote the relative polarity and facili­
traction-repulsion type.
tate the making of proper connections for correct di­
soft-iron strips of carefully determined configuration
rection of deflection of instruments.
are mounted inside the field coil.
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The relation of
the marked leads is such that instantaneous direction
When this coil is energized, it magnetizes the three
of the current in them is the same; namely, toward the
iron strips and also a vane attached to the pivoted
shaft.
transformer in the marked secondary lead, or vice
sion, and the other two strips a force of attraction,
The center iron strip exerts a force of repul­
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transformer in the marked primary lead and from the
These polarity markings are indicated in the
on the moving vane, in such a manner that the pointer
connection diagrams and should be followed irrespec­
moves upscale until the torque is counterbalanced by
tive of their physical location on the transformers.
the instrument control spring.
versa.
The expanded-scale, a-c voltmeters utilize a stand­
GROUNDING CASES OF A-C INSTRUMENTS
ard electrodynamometer mechanism with a saturable
It is frequently desirable to use transformers on
circuits of over 150 volts.
reactor placed in series with the moving coil.
The cases of instruments
The
moving-coil circuit is connected in parallel with a
which are used with current and potential transform­
circuit consisting of the field and frequency compen­
ers should be connected to the grounded side of the
sating network.
secondary circuits of such transformers.
No. 12 Awg
When the voltage source is applied across the satur­
copper wire is suitable for this purpose.
able reactor, the exciting current varies in a nonlinear
Grounding connections from the grounded side of
fashion with the voltage.
The scale distribution cor­
responds to this nonlinear variation, and the instru­
accordance with the provisions of the National Electric
ment produces an accurate, readable indication in the
Code.
area of the reference voltage.
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the secondary circuits to earth should be made in
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Fig. 3.
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BACK
SIDE
STUD
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FRONT
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Current passing through the mov­
tension wires when installing instruments on such
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GEH-1539C
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Installation
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f16 I TERMINALS
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32
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Dimensions of Types DB-12 and - 13 ammeters with rheostat for lead-length compensation.
5
Types AB and DB Ammeters and Voltmeters
BACK
SIDE
FRONT
�
3"
32
AT
FIG
50%
4
FINAL SIZE
DIMENSIONS OF TYPES AB-14 ·15 AND ·19 AND TYPES
,
AND ·19 AMMETERS VOd M E T ERS , AND GROUND DETECTORS.
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08:14, -15,
DIMENSIONS
STUD
LOCATION
INSTRUMENT
D-e Ammeters
X
CD
D-e Voltmeters
Fig. 4.
NOTE: THE LETTERS NEXT TO THE
TERMINAL STUDS ARE FOR PURPOSES
OF DIMENSIONAL LOCATION ONLY. FOR
CONNECTIONS, SEE THE APPROPRIATE
EXTERNAL CONNECTION DIAGRAM
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*PRESENT ONLY ON A·C VOLTMETERS (EXCEPT EXPANDED SCALE)
RATED 150 VOLTS OR BELOW
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MOUNTING "
STUD
·28 THO.
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GEH-1539C
AB
D-e
Ground Detector
A-c
Ammeters
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3
9/ 16"
3
9/16"
2 31/32"
3
9/16"
2 31/32"
3 7/B"
AB
4
15/32"
A-c Voltmeters
AB
4
15/32"
A-c Voltmeters (expanded-scale}
AB
5 29/32"
2 3 1/32"
3 7/8"
5
5/16"
Dimensions of Types AB- 14, - 15, and - 19 and Types DB- 14, - 15, and - 19 ammeters, and voltmeters,
FRONT
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and ground detectors
SIDE
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MOUNTING
STUD J..".zs THO
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NAMEPLATE
RHEOSTAT
4-
Fig. 5.
4·28 T HO
3"
32
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U S E AS GROUNDING STUD
WHEN REQUIRED
Dimensions of Types DB- 14, - 15,and - 19 ammeters with rheostat for lead-length compensation.
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FRONT
SIDE
BACK
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H��-R
--' ESIS CAGE*!
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15�yd-221"
32
32
--x
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STUD
LOCATION
INSTRUMENT
D-e Ammeter
0-c Voltmeter
AB
0-c Ground Detector
Ammeter
A·c Ammeter
AB
(double-rated)
AB
A-c Voltmeter
AB
A-c Voltmeter (expanded-scale)
AB
Fig. 6.
NOTE' THE LETTERS NEXT TO THE
TERMINAL STUDS ARE FOR PURPOSES
OF DIMENSIONAL LOCATION ONLY. FOR
CONNECTIONS, SEE THE APPROPRIATE
EXTERNAL CONNECTION DIAGRAM.
3"
32
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*PRESENT ONLY ON A-C VOLTMETERS {EXCEPT EXPANDED SCALE)
RATED 150 VOLTS OR BELOW
A-c
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: USE AS GROUNDING STUD IN
ACCORDANCE WITH EXTERNAL
CONNECTION IAGRA
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GEH-1539C
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Dimensions
DIMENSIONS
X
co
co
3 5/16"
2 27/32"
3 5/16"
3 5/16"
4 7 /32"
2 27/32"
2 27 /32"
3 3/4"
3 3/4"
4 7/32"
7/32"
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4
5 21/32"
3 3/4"
3 3/16"
Dimensions of Types AB- I 6 and DB- I 6 ammeters, voltmeters,
and ground detectors.
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32
SIDE
BACK
I"
4-28 THO
_....._-t-tt--tt----c:::� NAME­
PLATE
R H EOSTAT
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13
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FRONT
Fig. 7.
Dimensions of Type DB-16 ammeters with rheostat for lead-length compensation.
7
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Types AB and DB Ammeters and Voltmeters
FRONT
rr<M
PANEL
SIDE
OUNTING STUD
f 2BTHD.
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GEH-1539C
NOTE' THE LETTERS NEXT TO THE
TERMINAL STUDS ARE FOR PURPOSES
OF DIMENSIONAL LOCATION ONLY FOR
CONNECTIONS, SEE THE APPROPRIATE
EXTERNAL CONNECTION DIAGRAM.
*PRESENT ONLY ON A-C VOLTME TERS (EXCEPT EXPANDED SCAL E)
RATED 150 VOLTS OR BELOW
STUD
LOCATION
DIMENSIONS
X
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INSTRUMENT
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USE AS GROUNDING STUD IN
ACCORDANCE WITH EXTERNAL
CONNECTI ON DIAGRAM
CD
0-c Ammeter
AB
D-e Voltmeter
CD
0-c Ground Detector
A-c Ammeter
A-c Ammeter
AB
(double-rated)
AB
A-c Voltmeter
� -c
AB
Voltmeter (expanded-scale)
Fig. 8.
3 11/32"
3 11/32"
3 11/32"
4 1/4"
2 31/32"
2 31/32"
2 31/32"
3 7/8"
4 l/4"
5 11/16"
3 7/8"
4 1/4"
EF
AB
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3 7/8"
5 5/16"
Dimensions of Types AB- 18 and DB- 18 ammeters, voltmeters,
and ground detectors.
FRONT
SIDE
I"
4-28
THO.
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STUD
RHEOSTAT
USE AS GROUNDING STUD
IN
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ACCORDANCE WITH EXTERNAL
8
CONNECTION DIAGRA M
Fig. 9.
Dimensions of Type DB-18 ammeters with rheostat for lead-length compensation.
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GEH-1539C
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Connection Diagrams
Fig. 1 1. Two-tube. Form-3 resistor.
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Fig. 10. Single-tube, Form-3 resistor.
Fig. 12. Four-tube, Form-3 resistor.
CONNECTION DIAGRAMS
(Back Views)
SOURCE
-
+
13. Self-contained
d-e ammeter.
SOURCE
-
+
Fig. 15. Low
range on
double-rated d-e ammeter.
SOURCE
-
+
FUSES
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Fig. 17. Self-contained
d-e voltmeter.
+
+
FUSES
LOAD
Fig. 18. D-e voltmeter ra­
ted above 750 volts (with
external resistor).
Fig. 16. High range on
double-rated d-e ammeter.
SOURCE
LOW HIGH
-
.E
FUSES
ammeter with
external shunt.
Fig. 14. D-e
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Fig.
Fig. 19. Double-rated
d-e
voltmeter (illustrating use of
switch to select range).
LOAD
Fig. 19a. D-e ground de­
tector for voltages up to
and including 750 volts
(with external resistor).
9
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Types AB and DB Ammeters and Voltmeters
SOURCE
SOURCE
SOURCE
LOAD
Fig. 2 1. A-c a m m e t e r
(Types AB- 10, - 12, and
-13 only) with
current
transformer.
Fig. 22. A-c a m m e t e r
(Types AB- 14, - 15,- 16,- 18,
and - 19 only) with current
transformer.
SOURCE
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Fig. 20. Self-contained
a-c ammeter.
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GEH-1539C
SOURCE
Fig. 24. High range on
double-rated a-c ammeter.
SOURCE
FUSES
FUSES
LOAD
Fig. 25. Self-contained a-c
voltmeter.
SOURCE
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SOURCE
FUSES
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Fig. 23. Low
range
on
double-rated a-c ammeter.
SOURCE
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L OAD
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Fig. 26. A-c voltmeter ra­
ted above 150 volts (with
external resistor).
10
Fig. 27. A-c v o It m e t e r
(Types AB- 10, - 12, and - 13
only) with potential transformer.
Fig. 28. A-c v o It m e t e r
(Types AB- 14, - 15,- 16,- 18,
and - 19 only) with potential transformer.
FORM-15 , 50-MILLIVOLT SHUNTS
DIMENSIONS IN INCHES
a
a
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75
80
100
150
200
250
300
400
500
600
800
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1200
1500
2000
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3000
4000
5000
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8000
10000
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GEH-1539C
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Shunts
3
3
... .
...
..
...
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....
....
.. ..
...
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1
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5
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For current values above 10,000 amp, the best arrangement is to use two or more shunts in parallel
with a separate set of leads for each shunt.
The Form-15 shunts for 800 amp and below have single-leaf terminals; above 800 amp, multileaf terminals
are provided.
75- to 800-amp
shunts
Fig. 29. Dimensions of Form-15 shunts, 75
to 10,000 amperes, 50-millivolt drop.
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{a)
{c)
4,000-
to
1 0,000-amp
shunts
Fig. 30. Form-15 shunts, 75 to BOO amperes.
11
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WHEN YOU NEED SERVICE
IF YOU NEED TO REPAIR, recondition, or rebuild any electric apparatus, a G-E service shop near you is available day
and night, 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. For full information about these services,
contact the nearest service shop or sales office listed below:
.
.
.
.
.
.
SHOPS
672-676 E. Highland St.
Appalachian Bldg.
4639 Peachtree
Indus. Blvd.
..920 E. Fort Ave.
Boston -Medford 55, Mass. Mystic Valley Pkwy.
Charleston 28, W. Va ..306 MacCorkle Ave., S.E.
Charlotte, N. C.. .
. 2328 Thrift Road
Chicago 32, Ill..
4360 W. 47th St.
Cincinnati 2, Ohio ..
Decatur, Ill..
Denver 5, Colo.
3353 larimer St.
Detroit 2, Mich.
5950 Third Ave.
Indianapolis 22, Ind.
los Angeles 1, Calif.
6900 Stanford Ave.
louisville, Ky..
2014 New Main St.
Midland, Tex.
3404 Bankhead Hwy.
Milwaukee 3, Wise.
940 W. St. Paul Ave.
New York 14, N. Y.
416 W. 13th St.
Oakland, Calif..
1525 Peralta St.
Philadelphia 24, Po. .
Richmond 24, Va.
San Francisco 3, Calif.
. .505 W. Fifth Ave.
S. 155 Sherman St.
Wheeling, W. Va.
2050 Notional Rd.
York, Po..
54 N. Harrison St.
Youngstown 5, Ohio
lec
. 152 State St.
Baltimore 1, Md..
111 Park Ave.
Bangor, Maine.
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77 Central St.
Baton Rouge 6, La.
3170 Florida Blvd.
Battle Creek, Mich.
25 W. Michigan Ave.
Beaumont, Texas.
1385 Calder Ave.
. Rm. 816, 303 No. Broadway
Binghamton, N. Y..
19 Chenango St.
Birmingham 3, Ala.
1804 Seventh Ave., N.
Hawaii: American Factors, Ltd. ,
INSTRUMENT
\
409 Thirteenth St.
I 19 N. Robinson St.
Oklahoma City 2, Okla.
Omaha 2, Nebr.
409 S. Seventeenth St.
Pasco, Wash..
. 824 W. lewis St.
309 Jefferson Bldg.
Philadelphia 2 , Po..
1405 locust St.
Phoenix, Ariz.. P.O. Box 4037, 303 Luhrs Tower
Pittsburgh 22, Po.
The Oliver Bldg., Mellon Sq .
Portland 7, Ore.
920 S.W. Sixth Ave.
Providence 3, R. I..
Industrial Trust Bldg.
Raleigh, N. C..
336 Fayetteville St.
Reading, Po ..
31 N. Sixth St.
Richmond 17, Va ..
. 700 E. Franklin St.
Riverside, Calif . .
. 3570 Ninth St.
920 S. Jefferson St.
Fairmont, W. Va..
310 Jacobs Bldg.,
653 S. Saginaw St.
Rochester 4, N. Y.
11 0 S. First St.
Rutland, Vt.. .
38
Sacramento 14, Calif.
Fort Wayne 6, Ind...
3606 Sa. Calhoun St.
Saginaw, Mich.
.408 W. Seventh St.
St. louis 1, Mo.
Avia.
&
Oef.,
..89 E. Ave.
Rockford, Ill . ..
Fort Worth 2, Tex..
Second National Bank Bldg.
818 Olive St.
Salt lake City 9, Utah
434 So. Main Ave.
1240 Seventh Ave.
Tulare and Fulton St
San Francisco 6, Calif.
301 S. Elm St.
108 W. Washington St.
207 Jo-Fran Bldg.
Pfofessional Arts Bldg.
.764 Asylum Ave.
Seattle 4, Wash.
Seattle 8, Wash.. Avia.
Shreveport, La.
1312 live Oak St.
South Bend 1, Ind..
Spokane 4, Wash..
..841 Oak St.
Joplin, Mo. P.O. Box 948, 220 Y2 W. Fourth St.
. 112 Parkway Ave.
Kansas City 6, Mo..
106 W. Fourteenth St.
Knoxville 08, Tenn..
. .602 S. Gay St.
... . ..422 Seventh St.
lake Charles, lo..
710 Second Ave.
Def., 220 Dawson St.
910 Shelby Bldg.
112 W. Jefferson Blvd.
S. 162 Past St.
Springfield, Ill..
.607 E. Adams St.
.. .1387 Main St.
11 So. San Joaquin St .
Syracuse 6, N. Y..
3532 James St.
Tacoma 1, Wash. .
. 1202 Washington Bldg.
Tampa 6, Fla . .
1206 North A St.
420 Madison Ave.
Toledo 4, Ohio.
214 E. Hanover St.
Trenton 8, N. J..
Tucson, Ariz.
P.O. Box 710, 650 N. Sixth Ave.
320 S. Boston Ave.
Tulsa 3, Okla...
lansing 8, Mich. 306 Michigan National Tower
Utica 2, N. Y..
lexington, Ky..
Washington 5, D. C..
First National Bank Bldg.
&
Sioux City 13, Iowa. 572 Orpheum Electric Bldg.
. 11 0 N. Illinois St.
P.O. Box 548, 2 Second St.
.460 Park Ave.
. .4 E. Bryan St.
Savannah, Ga..
Indianapolis 4, Ind.
120 W.Michigan Ave.
235 Montgomery St.
San Jose 10, Calif. .
Houston 1, Te xes
Kalamazoo 3, Mich..
200 S. Main St.
San Diego 1, Calif..
.425 Cherry St., SE
Johnstown, Po..
Center St.
San Antonio 5, Texas.
Hartford 5, Conn.
Jamestown, N. Y.
Y2
626 Forum Bldg.
.407 Patterson Bldg.
Hagerstown, Md..
.258 Genesee St.
777-14th St., N.W.
lincoln 8, Nebr.. Sharpe Bldg., 206 S. 13th St.
Waterloo, Iowa..
little Rock, Ark.
Wenatchee, Wash.
328 N. Wenatchee Ave.
Wheeling, W. Va. .
40 Fourteenth St.
. .... 103 W. Capitol Ave.
Los Angeles 54, Calif...
. 212 N. Vignes St.
206 W. 4th St.
.200 E. First St.
Wichita 2, Ken.
louisville 2, Ky..
455 S. Fourth St.
lubbock, Texas.
3202 Avenue "A"
Williamston, N. C..
682 Cherry St.
Worcester 5, Mass.
Macon, Ga. ..
16 N. Carroll St.
Madison 3, Wise.
.875 Elm St.
Manchester, N. H..
P. 0. Box 3230,
DEPA RTM�NT,
!
Oakland 12, Calif.
Stockton, Calif..
.E
Augusta, Me.
.253 Second St.
229 W. Bute St.
Springfield 3, Mass.
Masonic Bldg.
Def., Fed. Bldg.,
Norfolk 10, Va.
. . 700 E. Union St.
531 W. College Ave.
&
Niagara Falls, N. Y. .
203 W. Capitol St.
1860 Peachtree Rd., N. W.
Augusta, Ga ...
Avia.
N. Y. International Airport, Jamaica 30, N. Y.
Jackson 1, Miss ..
Amarillo Bldg.
Appleton, Wise.
New York.
Jacksonville 2, Fla.
1132 Hamilton St.
Allentown, Po..
570 lexington Ave.
Roanoke 1 6 , Va.
Jackson, Mich.
720 Murray St.
..837 Gravier St.
New York 22, N. Y.
610 High St.
Gulfport, Miss.
323 Third St., S.W.
Amarillo, Texas.
New Orleans 12, La..
123 N. W. Fourth St.
Greenville, S. C.
90 State St.
744 Brood St.
. ...129 Church St.
Evansville 19, Ind..
Greensboro, N. C. .
335 S. Main St.
Albuquerque, N. Mex.
.1 001 State St.
Grand Rapids 2, Mich.
O F FICES
442 Cedar St.
. .215 No. Stanton
6200 Camp Bowie Blvd.
272 E. Indianola Ave.
SALES
Main and Woodlawn Aves.
Fresno 1, Calif.
1 So. St. Clair St.
Toledo 4, Ohio.
14 W. Superior St.
Fort Worth, Tex.
. 53 Railroad Ave.
Spokane 3, Wash.
700 Antoinette St.
Fergus Falls, Minn.108 N.Court Ave. P.O. Box 197
1098 Harrison St.
Southington, Conn.
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2600 Far Hills Ave.
. 650 Seventeenth St.
Flint 3, Mich..
3422 First Ave., S.
Seattle 4, Wash.
. 234 Third Ave., N.
Peoria 2, Ill. .
P.O. Box 1626
Salt lake City 4, Utah. 301 S. Seventh West St.
6-56 (40M)
Def.,
Eugene, Ore. .
.1115 East Road
St. louis 10, Mo.
Billings, Mont..
&
Erie, Po... ..
99 N. 17th St.
Sacramento, Calif.
Atlanta 3, Ga.
1039 State St.
11 W. Monument Bldg.
El Paso, Texas.
115 Albermarle St.
Alexandria, La..
205 N. Chaparral
1801 N. lamar St.
Elmira, N. Y..
1403 Ingram Ave.
Roanoke, Va..
Albany 7, N. Y...
40 S. Third St.
Duluth 2, Minn.
Portland 10, Oregon . ..2727 N. W. 29th Ave.
Akron 8, Ohio.
215 W. Third St.
4966 Woodland Ave.
Detroit 2, Mich.
6519 Penn Ave.
APPA R A T U S
.832 Georgia Ave.
Des Moines 9 , Iowa
1040 E. Erie Ave.
Pittsburgh 6, Po..
Abilene, Texas.
New Haven 6, Conn.
112 S. Tryon St.
Denver 2, Colo. .
2815 N. Robertson St.
Nashville 3, Tenn...
Charlotte 1, N. C..
Dayton 9, Ohio.Avia.
2025 49th Ave., N.
Minneapolis 12, Minn.
New Orleans, La..
210 Second St., S.E.
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819 E. 19th St.
940 W. St. Paul Ave.
Newark 2, N. J..
Dayton 2, Ohio
841 Oak St.
Kansas City 8, Mo..
Milwaukee 3, Wise.
Charleston 28, W.Va.. 306 MacCarkle Ave., S.E.
Davenport-Bettendorf, Ia.
1740 W. Vermont St.
Johnstown, Po..
Def.,
. ..12 S. Sixth St.
Dallas 2, Texas.
Houston 20, Texas..5534 Harvey Wilson Drive
&
207 Post Off. Bldg.
.54 St. Joseph St.
Corpus Christi, Texas
1039 State St.
Midwest City, Okla... . .. . . A via.
Mobile 13, Ala..
700 Tuscarawas St., W.
Columbus 15, Ohio.
2225 E. logan St.
. 25 S.E. Second Ave.
Canton 2, Ohio
Columbia 1, S.C., P.O. Box 1434, 1420 lady St.
3202 Manor Way
Davenport --Bettendorf, Ia...
8 N. Third St.
Memphis 3, Tenn.. . .
Miami 32, Fla...
Minneapolis 3, Minn. .
Cleveland 4, Ohio.
115 Busse St.
Dallas 19, Texas.
.535 Washington St.
Medford, Ore., P.O. Box 1349, 205 W. Main St •
Butte, Mont.. P.O. Box 836, 103 N. Wyoming St.
Cincinnati 2, Ohio
2128 Eakin Rd.
Corpus Christi, Texas.
Buffalo 3, N. Y..
Chicago 80, lii .. P.O.Box 5970A, 840 S. Canal St.
4966 Woodland Ave.
Columbus 23, Ohio
.140 Federal St.
Chattanooga 2, Tenn..
444 W. Third St.
Cleveland 4, Ohio.
Boston 1, Mass..
Cedar Rapids, Iowa.
. .318 Urban St.
Buffalo 11, N. Y.. . .
... . . . 1524 Idaho St.
Boise, Idaho . . . .
County Trunk, "P"
Baltimore 30, Md. . . .
.704 Bland St.
Bluefield, W . V a. .
Appleton, Wise. . .... Midway Industrial Area,
Atlanta--Chamblee, Ga..
. . 418 Rosser Ave.
Bismarck, N. Oak. .
ua
ls
Allentown, Pa •
SERVICE
an
APPARATUS
Honolulu 1
GENERAL
�-
..115 E. Main St.
288 Grove St.
56 N. Harrison St.
York, Po. . .
Youngstown 5 , Ohio..
272 E. Indianola Ave.
Canada: Canadian General Electric Company, Ltd., Toronto
ELECTRIC
CO MPANY,
WEST
LYNN,
MASS.
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GEI-49099A
SuperJedes GEI-49099
TYPES AB & DB AMMETERS AND VOLTMETERS
SUPPLEMENT TO GEH-15398 & GEH-1539C
Use the dimension drawings in this supplement for Type DB-16 & -18 instruments having model numbers
"2"
(Example: 8DB ..... .
2)
instead of Fig. 6, 7, 8, & 9 in Instructions GEH-1539B and -1539C.
SIDE
FRONT
------+-----.::---.--++-il
··�
BACK
ua
ls
ending in
PANEL
, M O UNTING
'
STUD
f 2BTHD.
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: USE AS GRO UNDING STUD IN
ACCORDANCE WITH EXTERNAL
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CONNECTION DIAGRAM
..
.. 432
\.
15[__
32
Fig. 1.
c
d"
3-
�,.4
Dimensions of Type DB-16 ammeters, voltmeters, and ground
detectors having model numbers ending in "2"
SIDE
FRONT
t �
r--
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��'�,.
·•.
/"PANEL
, M O UNTING
STUD
I"
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"
I
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[
BACK
I"
4-28 THO
84
RHEOSTAT
31"
--3�DIA
32
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4-28THD.
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NOTE' THE LE TTERS NEXT TO THE
TERMINAL STUDS ARE FOR PURPOSES
OF DIMENSIONAL LOCATION ONLY <"OR
CONNECTIONS, SEE THE APP>ROP RIAT E
EXTERNAL CONNECTION DIAGRAM.
Fig. 2. Dimensions of Type DB-16 ammeters with rheostat for lead­
length compensation, having model numbers ending in "2"
(over)
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FRONT
SIDE
rr<M
PANEL
OUNTING STUD
f-
28THD.
ua
ls
·
3"
8
NOTE' THE LET TERS NEXT TO THE
TERMINAL STUDS ARE FOR PURPOSES
OF DIMENSIONAL LOCATION ONLY FOR
CONNECTIONS, SEE THE APPROPRIATE
EXTERNAL CONNECTION DIAGRAM.
USE AS GROUNDING STUD IN
CONNECTION DIAGRAM
Fig. 3.
an
ACCORDANCE WITH EXTERNAL
Dimensions of Type DB-18 ammeters, voltmeters, and ground
detectors having model numbers ending in 2
FRONT
"
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"
SIDE
3"
-<fr+-{+)�'=T-+--'- 4
.E
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RHEOSTAT
USE AS GROUNDING STUD IN
ACCORDANCE WITH EXTERNAL
CONNECTION DIAGRAM
•·
w
.fig. 4.
Dimensions of Type DB-18 ammeters with rheostat for lead­
length compensation, having model numbers ending in 2
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INSTRUMENT DEPARTMENT,
"
"
GENERAL ELECTRIC COMPANY, WEST LYNN, MASS.
12-56 (25MI
•
1
J
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