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Programma MOM 600 Amp, Microhmmeters
 Switchgear breakdowns are frequently caused by excessively high
contact resistance at breakpoints and busbar joints.
Moreover, overheating risks
are becoming more serious due to the fact that today's distribution networks
have to carry heavier loads. Checking contact resistances at regular intervals
detects faults before they cause overheating. And here, an ounce of prevention
is worth a pound of cure.
Microhmmeters are used to measure contact resistances in
high-voltage breakers, disconnecting switches (isolators), knife-contact fuses,
bus joints, line joints etc.
The MOM600A™ is in a class apart on world markets. Designed
for use from the arctic to the tropics, this rugged, compact microhmmeter is
ideal for field work.
A complete set of equipment includes a set of highly flexible
cables (including separate measurement cables) and a sturdy transport case.
SPECIFICATIONS
Measurement current 0-600
A DC
(full-wave
rectified)
No-load voltage
9.4 V DC
Output
voltage
7.2 V DC (300 A)
(across
terminals)
5.0 V DC (600 A)
Max
load time
120 s (300 A)
Single
test
15 s (600 A)
Max
current with standard cables
GA-05053
(5 m) and 100micro ohm load
750 A
Max
load resistance
18 mΩ
(300 A)
with
standard cables
3 mΩ
(600 A) -
GA-05053
(5 m)
Measurement Section
Range
0-1999 µΩ
Resolution
1 µΩ
Accuracy
±1%, + 1 digit of displayed value
Instrument
Built-in combined ammeter/ohmmeter
External ammeter can be connected
Current
shunt
600
A/60 mV, ±0.5%
Other
Application field:
The instrument is intended for use in high-voltage substations and
industrial environments.
Protection:
Thermal cut-outs and miniature circuit breakers.
Mains
voltage:
230 V or 115 V AC ± 10%, 50-60 Hz
Dimensions:
356 x 203 x 241 mm (14.0" x 8.0" x 9.5")
Dimensions
transport case: 610 x 290 x 360 mm (24.0" x 11.4" x
14.2")
Weight:
25 kg (55 lbs). 41.1 kg (90.8 lbs) with accessories and transport
case.
Cable
set:
2 x 5 m (16 ft)/50 mm2 (current cables), 2 x 5 m (16 ft)/2.5 mm2
(sensing cables)
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