ABB ret650 Commissioning Manual page 40

Section 5
Testing IED operation
32
Set and configure the function(s) before testing. Most functions are highly flexible
and permit a choice of functional and tripping modes. The various modes are
checked at the factory as part of the design verification. In certain cases, only
modes with a high probability of coming into operation need to be checked when
commissioned to verify the configuration and settings.
Requirements for testing the function.
• Calculated settings
• Valid configuration diagram for the IED
• Valid terminal diagram for the IED
• Technical manual
• Three-phase test equipment
Content of the technical manual.
• Application and functionality summaries
• Function blocks
• Logic diagrams
• Input and output signals
• A list of setting parameters
• Technical data for the function
The test equipment should be able to provide a three-phase supply of currents and
three-phase voltage. The magnitude and angle of currents (and voltages) should be
possible to vary. Check that the IED is prepared for test before starting the test
session. Consider the logic diagram of the function when performing the test.
The response from a test can be viewed in different ways.
• Binary output signals
• Service values in the local HMI (logical signal or phasors)
• A PC with PCM600 (configuration software) in debug mode
Do not switch off the auxiliary power supply to the IED before
changes such as setting parameter or local/remote control state
changes are saved.
A mechanism for limiting the number of writings per time period is included in the
IED to prevent the flash memory to be worn out due to too many writings. As a
consequence it may take up to an hour to save changes. If the auxiliary power is
interrupted before a change is saved, that change is lost.
1MRK 504 126-UEN -
Commissioning Manual