78
1 Measuring device
2 Battery charging system
9 Measuring line
Ground conduc-
tor current
Preparations
- Only perform the measurement if an insulation resistance test has been carried out
successfully
- Direct method: The device must be isolated from earth. No other connections to the
earth potential are permitted (e.g. data lines, fitting, etc.)
- Connect the mains cable
- Re-connect the DC cables to the battery - Caution: observe the relevant safety pre-
cautions
Once the battery charging system has been connected, switch it back on. The battery
charging system must be in charge mode when measuring the ground conductor current,
as otherwise the measurement result will be unreliable.
Only the leakage currents that occur at grid frequency may be included (50 - 60 Hz function
of ammeter). High-frequency leakage currents distort the measurement result *).
*) These requirements comply with DIN VDE 0701-0702 and ÖVE/ÖNORM E8701-1. Also
refer to the applicable requirements and standards in your country.
There are two methods that may be used to measure the ground conductor current:
- Direct method: Device must be completely isolated and must not exhibit any links to
another earth potential
- Differential method:
PE Primär
PE Sekundär Primär Sekundär
WARNING! An electric shock can be fatal. Capacitors can charge during the in-
sulation resistance measurement. After carrying out the insulation resistance
measurement, check that all tested potentials are de-energised before continuing
with the safety inspection. Alternatively, the capacitors can be discharged by
short-circuiting the tested potentials or via the discharge function on the insulation
tester.
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