GE b30, Technical Reference Manual

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B30 Patient Monitor
3-6
Document no
.
2044677-001
(1) A current of 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 seconds, but no more than 10 seconds,
through the protective earth terminal or the protective earth pin in the mains plug and
each accessible metal part which could become live in case of failure in basic insulation.
(2) 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.
When taking this measurement, move the unitís power cord around. There should be no
fluctuations in resistance.
2.6.3 Acceptance criteria
For equipment without a power supply cord, the impedance between the earth terminal of the
(IEC 60320) AC inlet receptacle and the protective earth (PE) terminal (or any accessible metal
part 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 any accessible metal part which is protectively earthed shall not exceed
0.2 ohms.
2.7 Ground (earth) wire leakage current tests
Perform this test to measure current leakage through the ground (earth) wire of the equipment
during normal operation.
(1) Refer to the instructions contained with the safety analyzer to perform this test.
(2) Configure leakage tester as follows:
•
Polarity - NORMAL
•
Neutral - CLOSED
•
GND (Earth) - CLOSED
NOTE: The measuring device (MD) represents the network and voltage measuring instrument
and its frequency characteristics per IEC 60601-1.
(3) Read and record the current leakage indicated on the tester.
(4) Change leakage tester switches to:
•
Polarity - NORMAL
Power Cord
Leakage Tester
NORM
RVS
HIGH
LOW
GND
1K
0.15µF
10
Power Cord
Device
Under
Test
DMM set to measure AC voltage
GND
DMM