4.4.3
Commissioning: Inrush
The test procedure is dependent on the parameterized inrush-blocking-mode:
• [Protection Para / IH2] »IH2 . 3-ph Blo« = “Inactive”:•
For this mode, the test has to be carried out rst for each individual phase and then
for all three phases together.
•
[Protection Para / IH2] »IH2 . 3-ph Blo« = “Active”:
•
For this mode, the test is a three-phase one.
Object to be tested:
Test of inrush blocking.
Necessary means:
• three-phase current source with adjustable frequency,•
• three-phase current source (for the rst harmonic).•
The current sources need to be connected in parallel.
Procedure (dependent on the parameterized blocking mode):
• It is recommended to set »IH2 . tmax« (temporarily) to a value that is large enough•
to manually check the Inrush blocking signals within the menu [Operation / Status
Display / IH2].
•
Feed the current to the secondary side with nominal frequency.
•
• Feed abruptly current to the secondary side with double nominal frequency. The•
amplitude must exceed the preset ratio/threshold »IH2 . IH2 / IH1«, but must not
exceed the maximum current »IH2 . Imax«.
• Ascertain that the corresponding Inrush blocking signal is generated now: »IH2 .•
Block. L1«, »IH2 . Block. L2«, »IH2 . Block. L3«
Successful test results:
The corresponding Inrush blocking signal is generated and can be checked at [Operation /
Status Display / IH2], indicating the blocking of the current protection stage.
147WIC1WIC1-1.0-EN-MAN
4 Protective Elements
4.4.3 Commissioning: Inrush
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