Electrical Tests; Insulation Resistance - Fronius Symo 10.0-3-M Serviceanleitung, Ersatzteilliste

Electrical tests

Insulation resist-
ance
An electric shock can be fatal.
Some of the insulation resistance measurements are taken under high voltage. The pro-
cess must be completely understood before starting the test. Observe the following safety
precautions:
► Restrict access to the work area as far as possible.
► Do not touch any other person while performing the test and take measures to prevent
► A voltage is applied to the area under test each time that the insulation resistance test-
► Wear suitable protective clothing/protective equipment while conducting the test.
► When carrying out the insulation resistance test, do not touch any other person and put
► Ensure that the polarity is correct while conducting the insulation resistance test to
As the module array voltage has not been isolated from the mounting bracket, the
PV voltage is still present on the terminals.
These tests must be carried out while the cover is open. The insulation resistance test must
be carried out separately on the mounting bracket and on the inverter.
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Take safety precautions.
Observe the safety rules - DC voltage present!
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The following minimum insulation values apply. The test voltages specified must be ob-
served *):
*) These requirements comply with DIN VDE 0701-0702 and ÖVE/ÖNORM E8701-1. Also
refer to the applicable requirements and standards in your country.
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WARNING!
other people touching any metallic surfaces.
ing equipment is switched on. The insulation resistance testing equipment must be fit-
ted with an automatic self-discharge device.
measures in place to prevent other people touching the back of the solar module or the
terminals of the solar module with any part of their body.
avoid unreliable test results.
WARNING!
A thorough understanding of the tests is required before starting the work.
The inverter must be taken out of the mounting bracket.
The device being tested must be safely isolated from the AC grid (the grid lead [L, N]
must not be connected). If the AC grid cannot be disconnected from the mounting
bracket, the torques applied to all ground terminals must be checked.
CAUTION!
Strings must not be disconnected from the mounting bracket. The insulation resist-
ance test can be carried out when the module array is connected.
All switches (DC disconnector at position I), controllers, etc. must be closed during the
measurements.
The inverter must be disconnected from Fronius Solar Net and from the Datcom ring.
The polarity must be correct when the insulation resistance test is conducted.