Hi everyone in our first two episodes of the series we talked about how to
deliver a switchboard product digitally using Ecostruxure Power Commission
Here today in ecosystem power lab together with our best expert Fabrice we will look at another
really nice functionality that you could take advantage of to test the circuit breakers
Yes, testing breaker is not new but the user experience has been built from ground up
inside EPC to make this valuable job done without any hassle.
Today we will show you how to use EPC
to test our latest low voltage air circuit breaker Masterpact MTZ well circuit breaker testing is
essential to ensure the safe and reliable performance of the electrical installation
The primary goal of circuit breaker testing is to determine the condition
especially its core protection functions so giving the circuit breakers may be inactive for months
or years prior to the fault so a regime of circuit breaker testing is an important safety factor
EPC offers three levels of breaker test first a quick and basic routine checkup
second an automatic trip curve test which is equivalent to the secondary injection test
and third one to prepare the breaker for more sophisticated primary injection test
The circuit breaker testing is recommended at both startup and every two to three years after that
for preventive maintenance purpose
Launch EPC and use the direct connection method
Just connect the laptop to the micrologic x
on Masterpact MTZ with a mini USB cable whichever way you add the MTZ to the EPC project
ensure that you have selected the direct option in EPC and click on connect
This means you will have to connect your laptop and MTZ over USB even if the breaker has a remote communication module
Now that the circuit breaker is properly connected to the laptop
Let's begin with the basic testing functions in order to quickly check up the breaker status
This allows you to with one click evaluate the functioning of the micrologic control unit communication module
Here you will be able to see the voltages currents power if you see some strange values
like negative current or wrong power factor you know there has been a mistake and you can then fix it
if your circuit breaker is wired with any inside your module or m2c module
Use the device checkup io tab to see the status of digital input and validate the wiring is done properly
you can also trigger the outputs to check if the connected relay or device gets activated
In the device checkup feature you can also test if the circuit breaker trips by using the force trip function
If the breaker is installed with optional accessories of mn mx and xf coils
you can also test the open and close operation of the breaker
All these test results will appear in the EPC project report
Well, now let's move to another test function automatic trip curve test
it is actually equivalent to the so-called secondary injection test that is required
at startup or for preventive maintenance purpose. You can prove to your customers
that the breaker can actually trip according to the pre-configured protection settings inside micrologic
We strongly recommend performing such tests with a report every two years as part of the preventive maintenance program.
Select the basic protection areas of the curve you want to test
and launch the test. EPC will simulate a fault current to trigger a trip in the trip unit
It will also show if the trip time was within expected limits based on the trip curve
Using this information the software will show pass or failed result of the test
This test result can be seen in a special report
as shown here remember to generate and save the test report for each breaker
Alternatively you can also choose a specific injection current and time of injection as a
custom test point of the over current protection curve LSI. In this case the software will inject
the current for the duration entered and will show if a trip occurs or not along with a trip time
It will not show any pass or fail result but the result will also be available in the report
You can add up to six such custom test points for each breaker
Wow that's pretty handy! Now i'm gonna go ahead to the last test function which is
not required all the time but just in case your customer wants you to perform
a primary injection test on the circuit breakers... You can use this feature to prepare for such tests
Turn off the thermal memory and ground fault protection
and then use an external power source to generate the fault current. Remember as much
as possible we recommend to use of the automatic trip curve test to prolong the life of the breaker
Well you may wonder now with all these tests then how exactly you can save retrieve
and demonstrate the test result to your customers
So here it comes my favorite feature
intelligently generates a project report with all these information saved in a single place
It reduces the possibility of errors and free up your valuable time
By the way using digital logbook and switchboard QR code
Report can be automatically saved behind the QR code... That is super convenient!
We hope this video has helped you understand how you can test the Master pack MTZ circuit breaker
So thanks for attending and we hope it was useful thanks for watching and see you next time