6
Self test
The self test is mandatory for operation of inverters in Italy.
The prerequisites for performing the self test are as follows:
n
The country Italy was selected during initial commissioning.
n
The level of solar irradiation is high enough to ensure that the
inverter can feed the grid.
During the self test, the inverter checks its switch-off behaviour with
regard to too high / too low grid voltage and frequency (7 test
phases, duration of approx. 40 minutes). The following applies:
n
In each phase of the self test, the inverter changes its switch-off
threshold, step-by-step upwards/downwards from the set lower/
upper limit values.
n
When the switch-off threshold reaches the actual grid voltage/
frequency then the inverter stores this information.
n
The data is shown on the display as follows:
–
The current values of the first test phase are displayed first;
see the following illustration.
–
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 message must be displayed
and confirmed.
n
If the self test conditions are not satisfied, one of the
Messages of errors that prevent the self test from running,
p. 62is displayed.
n
If a measurement lies outside the required tolerance during the
self test then the self test is cancelled and the inverter displays
the message
Self test failed
. The inverter remains
disconnected from the grid (relay open, no feeding) until the
self test is passed successfully.
Note
To see the results of the self test saved in the inverter,
press Information
⇒
Self test.
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
1)
1)
time between following events:
n
Switch-off threshold reaches the actual grid voltage / frequency
n
The inverter disconnects itself from the grid
Function
EN
747,431 | Z09.2 | 18/02/2016
60
Summary of Contents for coolcept StecaGrid 1500
Page 1: ...Installation and operating instructions EN coolcept coolcept x 747 431 Z09 2 2016 02 18...
Page 57: ...Fig 20 Email confirming successful registration EN 747 431 Z09 2 18 02 2016 57...
Page 85: ...Appendix EN 747 431 Z09 2 18 02 2016 85...
Page 93: ...747 431 Z09 2 2016 02 18...
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