The Contact Resistance Meter evaluates the resistivity of electrical contacts of the circuit breaker, isolators, and bus bars. It is crucial to inspect the meter’s contacts regularly to guarantee that the circuit breaker is in good condition and continues to perform as intended. Otherwise, improper maintenance can cause arcing, phase loss and even fire from contacts. It checks the integrity of the electrical connections by measuring the resistance on the micro- or milli-ohm scale, and its primary purpose is to measure the resistance.
It helps detect loose connections, degraded contact surfaces, polluted or corroded contacts, and other potential issues with the connections. Because a larger contact resistance leads to higher losses I2R and a poorer current carrying capacity, it is necessary for contacts that transport significant amounts of current to have this quality.
From here, it is clear that the use of the Contact Resistance Meter is to measure the contact resistivity in a Circuit Braker.
First Things First, What Is A Circuit Breaker Timer?
A circuit breaker is a switching device that interrupts the flow of an aberrant or faults current. It is a mechanical device that, in addition to performing the function of a switch, disrupts the passage of large magnitude (fault) current. In other words, it is a fault interrupter. The primary function of the circuit breaker is to allow for the opening or shutting off of an electrical circuit. Likewise, preventing any major or even minor harm to the electrical system.
Based on the medium of arc extinction, there are many different types of circuit breakers, such as –
- Oil circuit breakers
- Lower limit circuit breakers
- Air blast circuit breakers
- Sulphur hexafluoride circuit breakers
- Suction or Vacuum circuit breakers
- Air break circuit breakers
How Does The Contact Resistance Meter Measures The Contact Resistance?
Visual inspections and contact resistance checks are the two most popular methods used to examine a circuit breaker’s contacts with the help of a contact resistance meter. The Contact Resistance Meter Manufacturers suggest taking these tests in two steps, and they are as follows-
- First is during the Visual inspection check, when the contacts of the circuit breaker get investigated to look for any pitting marks caused by arcing and worn or deformed contacts.
The measurement of the contact resistance is the second check that gets performed. It gets accomplished by passing a constant current, often in the range of 100A, 200A, and 300A, across the contacts and simultaneously monitoring the voltage drop across them. This examination uses a specialised device for measuring contact resistance. The value of the resistance must get compared to the value provided by the product manufacturer.
Top Contact Resistance Meter Brands One Must Consider!
S.B. ELECTROTECH is the leading Contact Resistance Meter Suppliers In India. Our resistance meters come with precise measurement technology specially designed for measuring the accurate readings in any circuit breaker. Visit our website to know more about our products!
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.
