Circuit breaker serial number

The standard requires the following by information to be identified and marked on the circuit breaker. In addition to the above the following should be either marked on the circuit breaker or made available in technical documentation:. Steven has over twenty five years experience working on some of the largest construction projects.

He has a deep technical understanding of electrical engineering and is keen to share this knowledge. About the author.

The windings of many medium and small sized transformers are protected by restricted earth fault REF systems. The illustration shows the principal of The relatively new switchgear and control gear standard, IEC 'Low-voltage switchgear and controlgear assemblies' has three methods which can be When current flows within a wire, a magnetic field is created.

The potion of this magnetic field perpendicular to the wire is called the magnetic flux There are up to 4 more spaces for letters or numbers between the AK and 25 that are important. There will be a number, most likely a 2 but it could be a 3, 4, all the way up to 10, which designates which type of trip unit that was installed at the factory. This guide will help you identify most of the options built in to your breaker from the factory and which, if any, will need to be changed or upgraded.

If A, what is the voltage of the close coil, control relay and trip coil? If A, do you have a wiring diagram number? Why type of trip unit is needed? What trip function is required? Are any accessories like bell alarm or under voltage protection required? Look for one of the following markings:. In most cases other markings like the style, issue or serial number will not identify a specific circuit breaker. Some older vintage, obsolete circuit breakers may not have catalog numbers on them.

Also, some circuit breakers may have worn or illegible labels. In these cases our technical sales team can most likely still identify your breaker with a surprisingly small amount of information. If you can, try to gather the following details before you contact us - it will expedite your quote:. The maximum current that the breaker withstands without any physical damage or caused by an electrical arc.

In our breaker 40kArms means our breaker can bear up to 40 kilo Ampere current. First, what is short circuit duration: The ability of a breaker to withstand a high short-circuit current. The standard rated short-circuit duration for the IEEE circuit breaker is 2 seconds. The IEC circuit breaker must withstand the fault for only 1 second. IEC even has a preferred rating for 0. On this criterion, IEEE is more conservative.

Making Current of a Circuit Breaker is the peak value of maximum current loop during sub-transient condition including DC component when Breaker closes. Example: Switchyard breaker. The opening coil is nothing but a coil that operates the circuit breaker opening mechanism. Generally, opening coil is called as tripping coil. The breaker associated feeders relay and manual tripping can be performed using the coil only.

In our breaker, we should give Volts DC supply to the coil.