Some Different Criteria to Consider When Selecting A Circuit Breaker

Nov. 23, 2021

Circuit breakers we may not have heard of, there are still a lot of blind spots in the choice of circuit breakers. Especially in the choice of large circuit breakers is not to start, the role of circuit breakers is used to block or through the overloaded circuit, so that you can prevent circuit safety accidents. Plays the role of safety prevention. Circuit breakers are very important in the whole diesel generator set. If the circuit breaker is chosen improperly, it may fail, causing great losses to the operation of the diesel generator set, and it is very difficult to maintain it in the later period.  

There are several different criteria to consider when selecting a circuit breaker  

 

Generator manufacturer Dingbo power master through their own experience, to give you a few methods for your reference:  

 

Several different criteria are considered when selecting a circuit breaker, including voltage, frequency, breaking capacity, continuous current rating, abnormal operating conditions, and product testing. Today, Topo power gives you a step-by-step overview of how to choose the right circuit breaker for your particular application.  


Rated voltage, total breaker available in different sizes and configurations The fixed voltage is calculated based on the highest voltage that can be applied to all terminal ports, the type of distribution, and how the breaker is directly integrated into the system. It is important to select circuit breakers with sufficient voltage capacity for final application.  

 

Circuit breakers up to 600 amps can be used at frequencies from 50 to 120Hz. Frequencies above 120Hz will cause the circuit breaker to have to be derated. In higher-frequency projects, eddies and iron loss can cause greater heat generation within the thermal trip assembly, requiring derating or specialized calibration of the circuit breaker. The total amount of derating depends on the ampere rating, frame size, and current frequency.  


 There Are Several Different Criteria to Consider When Selecting A Circuit Breaker


All higher rated circuit breakers over 600 amps contain transformer heated bimetallic plates for a maximum of 60Hz ac.  Special calibration is usually possible for minimum ac applications at 50Hz.  Solid state trip circuit breakers are pre-calibrated for 50Hz or 60Hz applications. If the diesel generator project, the frequency will be 50Hz or 60Hz. Before proceeding with a 50Hz project, it is advisable to check in advance with an electrical contractor to ensure calibration measures are in place.  Maximum interrupt capacity  

The breaker rating is generally considered to be the maximum fault current at which a control panel circuit breaker can be switched off without causing the system itself to fail.  The maximum fault current provided by the system can be calculated and determined at any given time.  An infallible rule to be followed in applying the correct circuit breaker is that its breaking capacity must be equal to or greater than the fault current that can be transmitted at the point in the system where the circuit breaker is applied.  

 

For continuous current ratings, molded case circuit breakers are measured in amperes at specified ambient temperatures. This ampere rating is the continuous current the breaker will carry at the calibrated ambient temperature. A general rule of thumb for circuit breaker manufacturers is to calibrate their standard circuit breakers at 104°F. The ampere rating for any standard application depends only on the type of load and duty cycle.  

We choose circuit breakers in any case, considering the brand manufacturers are indispensable, typical big brand circuit breakers, can provide us with very comprehensive information, can reflect the problems and advantages of circuit breakers in many aspects, so this is an indispensable evaluation link.  

 

Choose circuit breaker manufacturers generally have perfect service process, with perfect service process to do security in efficiency is very high, have perfect service process to do security, circuit breaker process is not easy to cause problems, to ensure the efficient use of circuit breakers.  The above is the view of the generator manufacturer on the choice of circuit breaker, in the face of so many choice of circuit breaker brand, we must be careful when choosing! We have different suggestions on the above content, can share.  


Dingbo has a wild range of diesel generators:Volvo / Weichai/Shangcai/Ricardo/Perkins and so on,if you need pls call us :008613481024441 or email us :dingbo@dieselgeneratortech.com


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