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Battery Ground-Fault Tracer

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					                                                                                                        BATTERY TEST EQUIPMENT

                                                                                                                                     1
                                                                                                           ®
                                                                                            BIDDLE
                                                                                            Battery Ground                           2
                                                                                            Fault Tracer
                                                                                                                                     3
                                                                                            • Ground faults in
                                                                                              ungrounded dc battery
                                                                                              systems easily located                 4

                                                                                            • Operates in high                       5
                                                                                              electrical noise
                                                                                              environment
                                                                                                                                     6
                                                                                            • Simplifies fault tracing by
                                                                                              identifying fault
                                                                                              characteristic (resistive              7
                                                                                              and capacitive)
                                                                                              magnitudes
                                                                                                                                     8


Battery Ground-Fault Tracer                                                                                                          9


DESCRIPTION
                                                                                                                                     10
                                             Incorporating a resistance and capaci-       portional to the fault impedance. Faults
The Battery Ground-Fault Tracer is an        tance bridge, the transmitter can be         up to 100 kΩ are easily tracked and
economical, manually-balanced instru-        used to determine the fault’s magnitude      isolated by clamping a direction-
                                             and severity prior to tracking the fault.    sensitive probe on the feeder cable and    11
ment that identifies, tracks and locates
ground faults in ungrounded dc battery       System capacitance can then be nulled        monitoring signal strength on the hand-
systems – on-line. It is particularly        from the measurement to prevent erro-        held receiver.
effective in a high electrical noise envi-                                                                                           12
                                             neous readings on the receiver. Immune
ronments, as the strength of the test        to distributed noise in the system, Bat-     FEATURES AND BENEFITS
current can be adjusted.                     tery Ground-Fault Tracer readings are        • Digital display of voltage and current
                                             unaffected by the presence of dc cur-        signal amplitudes                          13
The Battery Ground-Fault Tracer accel-
erates fault location by eliminating         rent and ac ripple up to 15 amperes.         • Bridge measurement of fault resis-
trial-and-error procedures and because       The transmitter can be left behind dur-      tance and system capacitance
faults can be located without going off-
                                                                                                                                     14
                                             ing tracking, which is performed quickly     • Wide fault resistance measurement
line. It is particularly useful in any       and easily using the hand-held receiver      range from 1 to 100 kΩ
industry where supply of power for op-       and clamp-on probe. The receiver pro-
erating measurement, communication                                                        • Immune to distributed noise              15
                                             vides digital display of signal amplitude,
and control equipment is critical.           with a multiposition switch to adjust        • Soft-start charging system to prevent
                                             gain for optimal display resolution.         sensitive relay tripping
APPLICATIONS                                                                                                                         16
                                                                                          • Convenient, hand-held receiver
The Battery Ground-Fault Tracer, which       PRINCIPLE OF OPERATION
consists of a line-operated transmitter      The Battery Ground-Fault Tracer              • Receiver gain control for optimal dis-
and a portable, battery-powered re-          transmits a 25 Hertz signal through an       play resolution                            17
ceiver, determines fault magnitude and       energized or de-energized system.            • Caster-mounted transmitter for easy
severity. The transmitter connects to        Feeder cables are tested for signal          portability
the battery bus and station ground.          amplitude, which is inversely pro-                                                      18

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AC-4 AVO-651 07.97
                                                                                                  AVO INTERNATIONAL            4-9
     BATTERY TEST EQUIPMENT

 1   SPECIFICATIONS                                  Fault Resistance                                             Dimensions
     Power Source                                    1 to 399 kΩ at 50 V; bridge accuracy ±10%                    Transmitter
                                                                                                                     12 H x 19.5 W x 11 D in.
     Transmitter: 120 Vac, 60 Hz, 200 VA max.        Line Capacitance                                                30 H x 49 W x 28 D cm
 2      (240 Vac, 50 Hz on -47 model)                0.01 to 11.1 µF; bridge accuracy ±20%                        Receiver
     Receiver: One 9 volt alkaline battery                                                                          1.45 H x 3.52 W x 7.5 D in.
       supplies up to 40 h continuous use.           Display
 3                                                                                                                  4 H x 9 W x 19 D cm
                                                     Transmitter: Separate 3-digit LCD meters
     Source Voltage                                     for volts and current                                     Weight
     Variable from 0 to 50 V rms                          Accuracy: ±5%
 4                                                                                                                Transmitter: 35 lb (15.9 kg)
     Source Current                                  Receiver: Digital meter display up to                        Receiver: 0.66 lb (1.47 kg)
     Load dependent from 0 to 2 A rms                  1.999 (three gain selections)
 5
     Source Frequency                                Temperature Range
     25 Hz, ±2%                                      Operating: 32 to 104° F (0 to 40° C)
 6   20 Hz, ±2% on -47 model                         Storage: -4 to +131° F (-20 to +55° C)


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                                                        ORDERING INFORMATION
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                                        Item (Qty)                                                            Cat. No.
                                        Battery Ground Fault Tracer, 120 Vac, 60 Hz ........ 246100
18                                      Battery Ground Fault Tracer, 240 Vac, 50 Hz ... 246100-47
                                        Included Accessories
19                                      Fused source leads, 20 ft (6 m) [1 pr] .................... 29386-3
                                        Current probe leads, 4 ft (1.2 mm) [1 pr] .............. 29999-1
                                        AC power cord, 6 ft (1.8 m) [1] .................................. 17032
20                                      Feedback cable, 40 ft (12 m) [1] ................................ 29998
                                        Padded accessory bag ................................................ 29996
                                        Battery, 9 volt [1] ....................................................... 1482-1
21                                      Operator’s manual [1] .............................. AVTM 246100JA
                                        Optional Accessories
                                        Canvas carrying case ................................................ 246010
22                                      Current sensor, 0.5 in. (12.7 mm)
                                           with 4.25 ft (1.3 m) lead ....................................... 30595



                                                                                                                                                 AC-4 AVO-651 07.97
     4-10   AVO INTERNATIONAL

				
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Description: Battery Ground-Fault Tracer