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Section 9
Testing IED operation
9.1.2
54
chapter. The functions can be tested in any order according to user preferences. Only
the functions that are used (Operation is set to On) should be tested.
The response from a test can be viewed in different ways:
•
Binary outputs signals
•
Service values on the local HMI (logical signals or phasors)
•
A PC with PCM600 application configuration software in work online mode
All setting groups that are used should be tested.
This IED is designed for a maximum continuous current of four times
the rated current.
Please observe the measuring accuracy of the IED, the test equipment
and the angular accuracy for both of them.
Please consider the configured logic from the function block to the
output contacts when measuring the operate time.
After intense testing, it is important that the IED is not immediately
restarted, which might cause a faulty trip due to flash memory
restrictions. Some time must pass before the IED is restarted. For
more information about the flash memory, refer to section
"Configuring the IED and changing settings".
Preparing the IED to verify settings
If a test switch is included, start preparation by making the necessary connections to
the test switch. This means connecting the test equipment according to a specific and
designated IED terminal diagram.
Put the IED into the test mode to facilitate the test of individual functions and prevent
unwanted operation caused by other functions. The busbar differential protection is
not included in the test mode and is not prevented to operate during the test operations.
The test switch should then be connected to the IED.
Verify that analog input signals from the analog input module are measured and
recorded correctly by injecting currents and voltages required by the specific IED.
To make testing even more effective, use PCM600. PCM600 includes the Signal
monitoring tool, which is useful in reading the individual currents and voltages, their
1MRK 504 160-UEN -
Transformer protection RET650 2.1 IEC
Commissioning manual
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