Circuit breakers have a very critical purpose in an electrical system. They interrupt current if there is an overload in the main line. Their response should be very precise because a slow breaker may be too late to prevent damage in the electrical facility before it trips. A too sensitive and fast breaker may interrupt the current due to a harmless voltage spike. This can be a nuisance because you are always having to investigate the validity of the fault that tripped the breaker.READ MORE >>
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Eaton's Magnum Circuit Breakers are used in ANSI/UL and IEC rated equipment and applications, providing high ratings in minimal space, rugged structure, enhanced safety, and easy maintenance, making them ideal for switchboards and switchgear.READ MORE >>
Many circuit breakers are tested by use of secondary injection test equipment applied to the breaker’s trip unit. These specialty test sets check the trip function of the circuit breaker — in other words, whether the electronics in the breaker are functioning properly. When you have work requirements that involve testing and maintaining Merlin Gerin circuit breakers, the Merlin Gerin Secondary Injection Test Set is ideal for verifying the proper operation of the trip circuitry. Merlin Gerin is only one of several well-known brands in the Protec stable of test equipment rental.READ MORE >>
For checking circuit breaker and protective relay systems, the secondary injection test set is an essential piece of electrical test equipment for companies to use. It differs from the standard primary injection testing method in that it does not require high current to be passed through the primary current path, but rather tests the breaker as a result of low level signals sent directly to the solid state trip device that controls the operation of the breaker.READ MORE >>
The Cooper VFI Vacuum Fault Interrupter Tester is a current injection device designed to simulate Fault Current for verification of minimum trip values and time current characteristics of Tri-Phase and TPG electronic control boards utilized in VFI pad-mounted switchgear.
Three internal flux-shift trippers enable confirmation of the presence of sufficient levels of energy upon the control board for operation of pad-mounted VFI flux-shift trippers. The on-board flux-shift trippers also enable self-checking of the VFI tester prior to general control testing. Further flux-shift tripper capability enables verification of operation of the flux-shift trippers within the VFI unit under test, external to the Cooper VFI tester.READ MORE >>
Circuit breakers should be tested on regular intervals to mitigate the risk of failure. A faulty breaker can cause a lot of problems if a fault condition were to occur. It is a good idea to have reliable tools that can thoroughly test the circuit breakers to avoid problems in the electrical system. One of the tools that offers complete diagnostic features for secondary injection testing of circuit breakers is the ABB PR010/T Secondary Injection Test Set.READ MORE >>
Low voltage molded case circuit breakers like the microprocessor-based SACE are often installed as protection devices for motors in industrial and commercial facilities. It is important to regularly check the condition of these devices because of the critical role that they have in protecting the electrical circuits that they are tasked with monitoring.READ MORE >>
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 >>
Designed to perform secondary injection testing on the Static Trip III (STIII) overcurrent tripping system utilized on the RL breaker, the Siemens PTS-5 Secondary Injection Test Set, packaged in a self-contained case, contains a microprocessor controlled constant current source which enables rapid verification of the performance of the STIII.
Directly enter the desired test current on the numeric keypad for easy test configuration, and the self-contained, automatically controlled digital timer allows simple verification of the time-current tripping characteristics. The Siemens PTS-5 also provides a regulated DC voltage to allow functional testing of the tripping actuator.READ MORE >>
Circuit breakers are used in homes, office buildings, and electric facilities. These instruments are prone to break down as they gather moisture, contaminants, and dirt while in use. If not maintained regularly, ciruit breakers insulation becomes weak as a result of the heat that is created due to arc interruption. Chemicals like hydrogen sulphide or chlorine can also be major factors in the damage and corrosion of insulation as well as metal components of circuit breakers.READ MORE >>