Nowadays, electronic devices are omnipresent, whether in-home or infrastructure settings. Circuit breakers, switches, relays, and other electrical connections operate continuously to avoid electrical damage. However, as long as two conductors are in touch, some resistance is to be expected. Furthermore, excessive resistance causes power outages and other electrical crises. As a result, regular maintenance is required for electrical connections. Nevertheless, a Contact Resistance Meter can help with this.
Contact Resistance Meter
It is primarily used to test switching devices, cable junctions, and other electrical connections. It is useful for measuring voltage drops, resistance provided by contacts, and resistance of joints or connections. The test is measured in milli-ohms or micro-ohms.
Contact Resistance Meter: A Detailed Overview Of Contact Resistance
It is the electrical resistance that occurs when components are linked at the contact point. It is determined by the material used and the connection’s quality. There must be a differentiation between purposeful and incidental contact resistance.
Additionally, transitions in switching and plug-in contacts, as well as cable and line connections, must always be maintained to a minimum because every resistance represents a loss of energy. This causes cost and in data lines, the signals cannot be passed on, hence data transmission is no longer assured. However, a faulty transition can also harm the cable’s substance, causing it to fatigue considerably faster.
Furthermore, with mechanical connections, contact resistance is a measure of the quality of the welded or bolted connection. The pressure dependence of the contact resistance of a carbon microphone is an intended application of contact resistance, but contact resistance is also used in the relationship between current and voltage in varistors.
The Need For A Contact Resistance Meter
A micro ohmmeter is used to measure the contact resistance. The Contact Resistance Meter Manufacturers in India designed these meters far more thorough and accurate than a normal multimeter for measuring resistance. This is because the resistance values for metal connections are at very low levels, making accuracy and tolerance critical.
Furthermore, with contact resistances, temperature dependence must always be considered because it harms the resistance value. Of course, the contact resistance can also be estimated, but this only yields a theoretical value that ignores the junction’s quality. Only measuring with a micro-ohmmeter may determine concerning quality.
Contact Resistance Meter: Why Is A Contact Resistance Test Required?
The contacts in the circuit breaker must be checked regularly to ensure that the breaker is in good working order. Contacts that have been neglected or broken can cause arcing, phase loss, and fire. This contact resistance test is especially critical for connections that carry a considerable amount of current (such as switchgear busbars) because increased contact resistance might result in decreased current-carrying capability and higher losses.
High-quality meters supplied by Contact Resistance Meter Suppliers in India aid in the identification of fretting corrosion of contacts and allow contact corrosion to be identified and prevented. Additionally, the contact corrosion results in:
- Power outage
- Heat generation
- Contactor capacity loss
- Failure to cut power when necessary
These issues can lead to catastrophic failure. One of the causes of contact failure and excessive contact resistance is fretting corrosion at high temperatures. To improve the corrosion resistance of contact surfaces and contact tips, various surface coatings and other treatments are applied.
In Conclusion
Contact resistance is another element that may influence thermal conductivity measurements, particularly in granular materials. When fluid flow changes channels, the hydrostatic pressure lowers. The resistance meter is highly crucial equipment to measure voltage drops and resistance produced by contact, joints, and connections.
SB Electrotech is a leading manufacturer and exporter of contact resistance meters. Moreover, we also have an extensive selection of AC High Voltage Tester and various other testing equipment. For more, you may visit the website.
S.B.ELECTROTECH
S.B. Electrotech is a company that specializes in manufacturing of electrical and electronic testing and measuring instruments. With years of expertise in this field, we ensure to provide high quality, safe, and sustainable products.
