maintenance & safety inspections
file: n:\article\cos14310m5-v1_06hpc-en\20120215_cos14310m5-v1.06hpc-en_manual_h-p-cosmos_running_machine.doc
© 2012 h/p/cosmos sports & medical gmbh [email protected] created 15.02.2012 printed 15.02.2012 page: 125 of 213
[9.C4]
Equivalent (alternative) leakage current I
EDL
measurement
N
Impedance measurement, indicating the current in the
Protective¬Earth¬Cable
N
The measuring is to be performed by a measuring device
for leakage current measuring according to VDE
0701/0702 (sports and fitness machines) or VDE
0751/IEC 601-1 (medical devices).
N
The measurement is equivalent to the single fault earth
leakage current based on IEC 60601.
[9.C5]
Leakage current measurement
direct method: measurement in PE - line
difference current method: supply/return line
N
The measuring is to be performed by a measuring device
for leakage current measuring according to VDE
0701/0702 (sports and fitness machines) or VDE
0751/IEC 60601-1 (medical devices).
N
The leakage current of the equipment is to be measured
under operating conditions, if -despite closed switching-
not all isolations are seized.
N
Measurements must be made on both poles.
N
The unit to be tested must be isolated against earth
potential.
N
The measurement is equivalent to the earth leakage
current with grounded application parts based on
IEC 60601.
N
During the direct method the device under test
is temporarily without PE-connection. Especially devices
without potential-isolation-transformer (sports devices)
have temporarily a voltage of approx. 120 volts on the
metal housing and frame parts. Do not touch the device
under test during this measurement!
