Insulation Resistance - Fronius CL 44.4 Delta Serviceanleitung

Insulation Resis-
tance
During the test, insulation may not fall below the following values. The specified test volt-
ages must be observed *):
Measurement
AC -> Ground
DC -> Ground
*) These requirements relate to DIN VDE 0701-0702 and ÖVE/ÖNORM E8701-1. In addi-
tion, individual national requirements and standards must also be observed.
1 Measuring instrument
2 Inverters
9 Measuring leads
Insulation measurement must be carried out between the following points:
DC+ and DC- can be short-circuited on the inverter for this test, otherwise both DC inputs
must be measured individually
L1, L2, L3 and N can be short-circuited on the inverter for this test, otherwise all AC inputs
must be tested individually.
Measurement points:
PE against N and L1, L2 and L3
PE against DC + and DC -
WARNING! An electric shock can be fatal. Insulation resistance is tested, in part,
using high voltage! Before the test is started, the procedure must be completely
understood. The following safety measures must be adhered to:
- Measurement should only be carried out once the PE conductor resistance
test has been carried out successfully.
- As far as possible, restrict access to the working area.
- When carrying out the test, do not touch any other people and take measures
to ensure that no other people touch metal surfaces.
- Each time the insulation resistance measurement instrument is switched on,
there is a voltage present at the area being tested. The insulation resistance
measurement instrument must be fitted with an automatic self-discharging
unit.
- Throughout the test, suitable protective clothing/equipment must be worn.
- Ensure that the insulation resistance test is carried out with the correct polar-
ity, as incorrect polarity may lead to incorrect measurement results.
Test voltage
At least the max. DC input voltage of the equipment,
but max. 750 V.
>= 500 V
Example: Measurement of the insulation resistance
(PE to L1).
Limit
>= 1 M?Ω
>= 1 M?Ω
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