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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Circuit breakers are important devices that interrupt current when an electrical fault occurs. If they fail to operate properly during a fault condition, the electrical system can be at risk of being damaged. Additionally, the mis-operation of such a device can lead to costly impacts associated with the interruption of electrical service. Technicians should regularly test for potential problems so the circuit breakers can be verified to operate according to their intended design. Regular maintenance practices provide the opportunity to identify and correct operational issues and ensure power system reliability.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 >>
When checking the continuity of a test circuit, rely on the Megger DLRO200-115 200A Digital Low Resistance Ohmmeter to quickly ramp the test current up to the desired level. An auto-ranging and easy to use DLRO, the Megger DLRO200-115 measures resistance in switch and breaker contacts, bus-bar joints, and other high-current electrical systems.
As many as 300 sets of results may be stored in the test set’s on-board memory for later download to a PC or may be sent directly to a printer via the RS232 port.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 >>
Circuit breaker or relay contacts, bus bars and switchgears constantly carry high currents. If the junctions deteriorate, the current carrying efficiency may be reduced and cause several problems like welding of contacts, localized Ohmic heating and eventual component failure.READ MORE >>
The Megger DLRO10HD 10A Digital Low Resistance Ohmmeter measures low resistance values in applications ranging from railways and aircraft to resistance of components in industry.
Any metallic joint can be measured you must be aware of measurement limitations depending on application.READ MORE >>
Industries that consume vast amounts of electrical power must include low resistance ohmmeter measurements in their maintenance operations. Not only does abnormally high resistance cause unwanted heating, possibly leading to danger, but it also causes energy losses which increase operating costs.READ MORE >>
The Megger DLRO10HD 10A Digital Low Resistance Ohmmeter is a heavy duty model that combines simplicity of operation with selected high power ranges and the ability to simultaneously make measurements and charge the battery from line power.
The Megger DLRO10HD provides five test modes each of which is selected via a rotary switch. Controls are simple and easy to operate in all weather conditions and with gloved hands operation.READ MORE >>
Any industry that consumes large amounts of electrical power should include low resistance ohmmeter measurements in their maintenance operations. Abnormally high resistance causes unwanted heating, possibly leading to danger, and it also causes energy losses which increase operating costs.READ MORE >>
Resistance (R) is the property of a circuit or element that determines, for a given current, the rate at which electrical energy is converted to heat in accordance with the formula W=I2R. The practical unit is the ohm. The low resistance measurement will indicate when degradation has or is taking place within an electrical device.READ MORE >>