Megger MOM600A Micro-ohmmeter

Micro-ohmmeters are used to measure contact resistances in high-voltage breakers, disconnecting switches (isolators), knife-contact fuses, bus joints, line joints etc. The Megger MOM600A can provide an output current of up to 600 A, and it can be set to six different measuring ranges. Full-wave rectified current is used for measuring. The instrument is equipped with a device that guards against induction. A relay short-circuits the sensing input when the instrument’s ON/OFF switch is off and also when the instrument is in the mΩ mode. To protect against external overvoltages, both the current output and the sensing input are decoupled to ground. The MOM600A includes a set of highly flexible cables (including separate measurement cables) and a sturdy transport case. FEATURES Easy to operate. Designed for rugged field use. Highly flexible cable connections. Megger MOM600A Specifications Environment Application Field The instrument is intended for use in HV substations and industrial environments. Temperature Operating: 0 to +40°C Storage/Transport: -40 to +70°C. Humidity 5 to 95% RH, non-condensing. Resistance Measurements Range 0 to 1999 µΩ. Resolution 1 µΩ. Inaccuracy +1% of reading + 1 digit (at 100 to 600A test current). Output Current 0 to 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). Max Load Capacity Output Current Minimum 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 15s 5 min. 32 A CE-Marking EMC 2004/108/EC. LVD 2006/95/EC. General Specifications Mains Voltage 230 V AC, 50/60 Hz. Power Consumption (Max) 7360 VA. Protection Miniature circuit breakers, thermal cutouts. Current Cables 2 x 5 m (16 ft), 50 mm². Sensing Cables 2 x 5 m (16 ft), 2.5 mm². Dimensions Instrument: 356 x 203 x 241 mm Transport Case: 610 x 290 x 360 mm. Weight 24.7 kg (54.5 lbs), 42.8 kg (94.4 lbs) with accessories and transport case. MOM600A warranty 1 year.

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