Self Test - Steca coolcept Bedienungsanleitung

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Self test

The self test is mandatory for operation of inverters in Italy.
Function
The prerequisites for performing the self test are as follows:
Italy was selected during initial commissioning.
The country
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The level of solar irradiation is high enough to ensure that the inverter can feed the grid.
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During the self test, the inverter checks its switch-off behaviour with regard to too high / too low
grid voltage and frequency (6 test phases, duration of approx. 40 minutes). The following applies:
In each phase of the self test, the inverter changes its switch-off threshold, step-by-step
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upwards/downwards from the set lower/upper limit values.
When the switch-off threshold reaches the actual grid voltage/frequency then the inverter
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stores this information.
The data is shown on the display as follows:
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– The current values of the
– The values of the subsequent test phases are added below (initially hidden).
– If the self test succeeded then the message Self test passed is added below. The mes-
sage must be displayed and confirmed.
If the self test conditions are not satisfied, one of the
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self test from running, p. 127 is displayed.
If a measurement lies outside the required tolerance during the self test then the self test is
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cancelled and the inverter displays the message Self test failed. The inverter remains dis-
connected from the grid (relay open, no feeding) until the self test is passed successfully.
Note
The data stored in the inverter can be read using a PC and the InverterSelftestProtocol software.
More information on this is provided in the StecaGrid Service_InverterSelftestProtocol manual and
at www.stecasolar.com ⇒ PV grid connected ⇒ Software.
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first test phase are displayed first; see the following illustration.
① Lower / upper limit value according to the country setting
② Measured actual grid voltage / frequency
③ Switch-off threshold (changed in steps)
④ Switch-off time = time between following events:
Switch-off threshold reaches the actual grid voltage / fre-
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quency
The inverter disconnects itself from the grid
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Ä Messages of errors that prevent the
747.431 | Z08 | 2014-01-31