9 Setting the Insulation Monitoring of the PV System
SMA Solar Technology AG
74
SCCP-JP-BA-A4-en-12
User Manual
9.3 Setting the PV System to Insulation Monitoring with Remote Soft
Grounding and an Insulation Monitoring Device
9.3.1 Information on Insulating PV Modules with Remote Soft Grounding and an
Insulation Monitoring Device
Ground-fault monitoring with Remote Soft Grounding does not provide protection from injury.
The option "Remote Soft Grounding and insulation monitoring device" allows the PV array to be switched automatically
from grounded operation to insulated operation. To ensure that there is no insulation error on the grounded terminal, an
insulation measurement is carried out. After switching to insulated operation, the insulation monitoring device checks each
terminal of the PV array for potential insulation errors.
Switching to insulated operation is useful for performing maintenance or service work on or near the PV array (e.g. cutting
the grass) or for checking the status of the insulation at regular intervals.
9.3.2 Switching to Insulated Operation
1. Set the parameter
RemMntSvc
to
On
☑ The insulation monitoring device starts collecting data. When the parameter
IsoErrIgn
is set to
On
, the error
3504 - Insulation error ignored
is displayed.
✖ The displayed error
3504
does not disappear after approximately 15 minutes?
The insulation is defective.
• Have the insulation checked and, if necessary, repaired by a qualified person.
• Acknowledge the error.
2. Wait a few minutes and then display the instantaneous value
Riso
on the user interface (see Section 6.1, page 40).
☑ The insulation resistance is greater than 45 k Ω . It is safe to enter the PV system.
✖ The insulation resistance is less than 45 k Ω ?
There is an insulation error and you must not enter the PV system.
• Have the insulation checked and, if necessary, repaired by a qualified person.
9.3.3 Switching to Grounded Operation
• Set the parameter
RemMntSvc
to
Off
