The resistance of an electrical connection increases over time due to temperature, cycling, and other environmental stresses. The degradation of these connections can result in excessive losses due to heating and operability issues . Periodic testing of contact resistance and/or other electrical bonds can help to identify changes in the condition of contacts and other electrical connections.READ MORE >>
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Ohmmeters are an electronic device that measure electrical resistance, and come with different levels of sensitivity. Some are designed to measure low-resistance materials, while others measure higher resistance. The higher resistance the material has, the less current will pass through it.
An ohmmeter is typically not used to measure resistance across an entire circuit, but rather through various parts of the circuit, although it can be used to test that a circuit is not broken.READ MORE >>
Suitable for testing circuit breaker contacts, switch contacts, busbar joints or other applications where high current is needed, Protec offers several digital low resistance ohmmeters for rent.READ MORE >>
The Omicron CIBANO 500 Circuit Breaker Test System is a 3-in-1 system capable of testing all types of circuit breakers, medium-voltage or high-voltage circuit breakers with live and dead tank design.
The CIBANO 500 is a micro-ohmmeter, timing analyzer, and a coil and motor supply all in one device, allowing for all important circuit breaker tests to be carried out even when a station battery is not available.READ MORE >>
Low resistance measurement is used to determine the condition of joined junctions like circuit breaker and relay contacts and terminals. When these joints weaken, carbon deposits, grease, dirt and other contaminants resulting in the resistance to increase, which in turn causes the junction to not efficiently carry the current, dissipating the power losses as heat. Thus, leading to further deterioration and eventual failure.READ MORE >>
Reduced electrical connections decrease the effectiveness of the ground bed and can cause substantial power quality-related problems and/or catastrophic failure in the event of a major electrical surge.READ MORE >>
The AEMC 6250 10A Micro-Ohmmeter is an accurate Micro-Ohmmeters with results up to 0.05% high accuracy, utilizing a four-lead Kelvin method of testing,
With the AEMC 6250 10A Micro-Ohmmeter resistance measurements are automatically calculated and displayed, taking into account the measurement value, ambient temperature, reference temperature and metal temperature coefficient. Sample temperature can be manually entered by the operator or directly measured by the AEMC 6250 10A Micro-Ohmmeter with an external RTD temperature probe.READ MORE >>
The Megger DLRO200-115 Digital Low Resistance Ohmmeter is an a.c. powered low resistance ohmmeter designed to measure d.c. resistances in the low milliohms or microhms using a maximum test current of 200 Amps d.c. The maximum test current available is dependent upon the power supply, the resistance of the test leads and the resistance of the item being tested.READ MORE >>
The AEMC 6250 Micro-Ohmmeter is uniquely designed to conduct tests on both resistive and inductive material, with operator selection directly from the front panel. Three test modes are available: resistive (instantaneous test), inductive (continuous test), and auto (repetitive test). Up to 1500 measurements can be stored and printed directly to a printer or from a PC.READ MORE >>
Low resistance measurement will indicate when degradation has or is taking place within an electrical device.Changes in the value of a low resistance element are one of the best and quickest indications of degradation taking place between two contact points.READ MORE >>