MOM600A Data Sheet Brochure

User Manual: MOM600A-Data-Sheet-Brochure

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MOM600A
Micro-ohmmeter
▪▪Compact and rugged
▪▪Easy-to-use
▪▪600 A output current
DESCRIPTION
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.
Micro-ohmmeters 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 micro-ohm-
meter 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.
MOM600A
Micro-ohmmeter
APPLICATION EXAMPLES
A. Measuring the resistance of a circuit
breaker element
1. Connect the micro-ohmmeter to the circuit breaker.
2. Set the current (100 A in this example).
3. Press the resistance pushbutton.
4. Read the result.
B. Measuring the resistance of busbar joints
1. Connect the micro-ohmmeter’s current cables to the object be-
ing tested. Do not connect the sensing cables since measure-
ments will be taken using an external movable voltmeter.
2. Set the current (100 A in this example).
3. Connect an external voltmeter to the bus.
4. Read the voltmeter (0.1 mV = 1 µΩ in this example).
5. Move the voltmeter to the next joint.
6. Repeat step 4.
AB
MOM600A
Micro-ohmmeter
SPECIFICATIONS
Specifications are valid at nominal input voltage and an ambient
temperature of +25°C, (77°F). Specifications are subject to change
without notice.
Environment
Application field The instrument is intended for use in
high-voltage substations and industrial
environments.
Temperature
Operating 115 V 0°C to +50°C (32°F to +122°F)
Operating 230 V 0°C to +40°C (32°F to +104°F)
Storage & transport -40°C to +70°C (-40°F to +158°F)
Humidity 5% – 95% RH, non-condensing
CE-marking
EMC 2004/108/EC
LVD 2006/95/EC
General
Mains voltage 115 / 230 V AC, 50 / 60 Hz
Power consumption (max) 115 V, 4370 VA
230 V, 7360 VA
Protection Miniature circuit breakers, thermal
cut-outs
Dimensions
Instrument 356 x 203 x 241 mm (14” x 8” x 9,5”)
Transport case 610 x 290 x 360 mm
(24.0” x 11.4” x 14.2”)
Weight, 115 V model 25 kg (55.1 lbs) 43.1 kg (95 lbs) with
accessories and transport case
Weight, 230 V model 24.7 kg (54.5 lbs), 42.8 kg (94.4 lbs)
with accessories and transport case
Current cables 2 x 5 m (16 ft), 50 mm²
Sensing cables 2 x 5 m (16 ft), 2.5 mm²
Measurement section
Resistance range 0 – 1999 μΩ
Resolution 1 μΩ
Inaccuracy ±1% of reading + 1 digit
(at 100 – 600 A test current)
Output, 115 V model
Current 0 – 600 A DC
Open circuit voltage 5.2 V DC
Current shunt output 10 mV / 100 A ±0.5%, max 60 mV out,
max 10 V to protective earth (ground)
Output, 230 V model
Current 0 – 600 A DC
Open circuit voltage 9 V DC
Current shunt output 10 mV / 100 A ±0.5%, max 60 mV out,
max 10 V to protective earth (ground)
Load capacity, 115 V model
Current adjustment set to 100%
Output
current
Min. output
voltage
Max.
load time
Rest time Input current
100 A DC 4.6 V --8 A
300 A DC 3.8 V 1.5 min. 15 min. 20 A
600 A DC 2.6 V 10 s 5 min. 38 A
Load capacity, 230 V model
Current adjustment set to 100%
Output
current
Min. output
voltage
Max.
load time
Rest time Input current
100 A DC 8.3 V ––6 A
300 A DC 7.2 V 2.5 min. 15 min. 16 A
600 A DC 5.6 V 15 s 5 min. 32 A
Cable set GA-05053 (2 current cables and 2 sensing cables)
Ground cable GA-00200 Optional accessory:
Calibration shunt BB-90020
MOM600A_DS_en_V04a
Art. No. ZI-BB05E ▪ BB0375EE ▪ 2017
Subject to change without notice.
ISO 9001:2008
The word ”Megger” is registered trademark
www.megger.com
SALES OFFICE
Megger Sweden AB
Rinkebyvägen 19
SE-182 36 DANDERYD
SWEDEN
+46 8 510 195 00
seinfo@megger.com
ORDERING INFORMATION
Item Art. No.
MOM600A
Complete with: Cable set GA-05053, Ground cable
GA-00200, Transport case GD-00182
115 V Mains voltage B B -1119 0
230 V Mains voltage BB-12290
Optional accessories
Cable set 10 m
2 x 10 m (33 ft), 70 mm2 (current cables).
2 x 10 m (33 ft), 2.5 mm2 (sensing cables)
Weight: 16.8 kg (37 lbs) GA-07103
Cable set 15 m
2 x 15 m (49 ft), 95 mm2 (current cables).
2 x 15 m (49 ft), 2.5 mm2 (sensing cables)
Weight: 29.4 kg (65 lbs) GA- 09153
Calibration shunt
600 A/60 mV BB-90020

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