An electrical circuit breaker is a switching device operated either automatically or manually, to protect and control electrical power systems. They are found in a range of systems ranging from appliances to complex power installations. A well functioning circuit breaker protects these systems from damage caused by power or voltage overload and short circuits. Modern circuit breakers are designed to handle huge currents and for the safe interruption of arc formation during operation.
Fault-handling strategies for circuit breakers
Given their critical function in protecting expensive and important equipment, it is important to ensure that no faults occur in circuit breakers. During installation, the right circuit breaker needs to be selected for the electrical load it is expected to handle. Proper wiring needs will ensure that all systems shut down as soon as the circuit breaker senses a fault. Regular checks during operation can signal if the circuit breaker needs maintenance or replacement, thereby protecting the investments of users.
Which parameters should be monitored?
Different types of circuit breakers have different parameters. For example, checks for Gas leakage is important in SF6 circuit breakers. Some general tests of parameters include:
Measurement of mechanical operating times of circuit breakers to verify, analyse and validate its proper functioning Regular contact resistance measurement of points such as Isolator contacts, bus bar joints and weld joints. Motwane offers an extensive range of test equipment for circuit breaker testing that can be accessed here.