Ground (Earth) Wire Leakage Current - GE Transport Pro Service Manual

Ground (Earth) Wire Leakage Current

Revision A
Checkout: Electrical Safety Tests
Some country agency's do require this test after field equipment repairs
(i.e. Germany's DIN VDE 0751 standards).
Consult your country/local safety agency if in question.
Compliance is checked by following this procedure:
1. A current not less than 10A and not exceeding 25A from a current
source with a frequency of 50 or 60 Hz with a no-load voltage not
exceeding 6 V is passed for at least 5 s through the protective earth
terminal or the protective earth pin in the mains plug and the
equipotential stud which could become live in case of failure in basic
insulation.
2. The voltage drop between the parts described is measured and the
impedance determined from the current and voltage drop. It shall not
exceed the values indicated.
For equipment without a power supply cord the impedance between the
protective earth terminal and the ground tabs of the Video In connector
which is protectively earthed shall not exceed 0.1 ohms
For equipment with a power supply cord the impedance between the
protective earth pin in the mains plug and the ground tabs of the Video
In connector which is protectively earthed shall not exceed 0.2 ohms.
When taking this measurement, move the monitor's power cord around.
There should be no fluctuations in resistance.
Perform this test to measure current leakage through the ground (earth)
wire of the equipment during normal operation.
NOTE
When testing the monitor, the device under test includes the optional
external power supply.
The device under test is to be tested at its normal operating voltage.
Transport Pro
2012659-042
9-5