77
EN
Insulation resist-
ance
The main switch must be switched on.
With nominal (DC) battery charging system voltages 500 V the test voltage of the
measuring equipment is 500 V for all measurements *).
The insulation resistance must not fall below the following values *):
Legend: Primary = AC (L and N) | Secondary = DC (DC+ and DC-) | Earth = PE
*) These requirements comply with DIN VDE 0701-0702 and ÖVE/ÖNORM E8701-1. Also
refer to the applicable requirements and standards in your country.
The insulation measurement must be taken between the following points:
DC+ and DC- should be short-circuited for this test on the battery charging system, other-
wise both DC inputs have to be measured separately.
N and L should be short-circuited for this test on the battery charging system, otherwise
both AC inputs have to be measured separately.
Use an adapter to short-circuit DC+ / DC- and L / N during this measurement
Only use the original charger leads and mains cable for taking the measurements.
WARNING! An electric shock can be fatal. Some of the insulation resistance
measurements are taken under high voltage. The process must be completely
understood before starting the test. Observe the following safety precautions:
- Only perform the measurement if a ground conductor resistance test has
been carried out successfully
- 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 other people touching any metallic parts
- A voltage is applied to the area to be tested each time that the insulation re-
sistance measuring device is switched on. The insulation resistance measur-
ing device must be fitted with an automatic self-discharge device.
- Wear suitable protective clothing / protective equipment while conducting the
test.
- Ensure that the polarity is correct while conducting the insulation resistance
test to avoid unreliable test results
Measurement Measured value
Primary -> Earth 1 M
Secondary -> Earth 2 M
Primary -> Secondary 1 M
PE to Primary PE to Secondary Primary to Secondary