Isolating Transformer - Leakage Current - iTD uni-cart Gebrauchsanweisung

POAG plug in the room. Next, connect the POAG supply cables to the POAG pins of the multiple
sockets and the appliance.
3.5 Isolating transformer – leakage current
The purpose of the equipment cart is to provide a practical mobile workstation for electromedi-
cal equipment. Total earth leakage currents must not exceed a maximum value of 0.5 mA so that
the entire medical electrical system can be compliant with IEC 60601-1. If the sum of the ground
leakage currents would exceed the tolerance range, the system must be supplied through a safety
transformer.
If there is no isolating transformer, the multiple socket/auxiliary socket system on the equipment
cart must not be used for connecting equipment, which does not correspond to leakage current
requirements in accordance with IEC 60601-1.
If an isolating transformer is mounted, the total power uptake of all the connected units must
remain within the rated value for the isolating transformer.
3.6 Earth-leakage-guard (ELG)
The following descriptions are only applicable for the carrier systems in which the item
"isolating transformer with insulating monitor" is installed.
3.6.1 Control panel of the earth-leckage-guard (ELG)
For equipment with an integrated installation monitoring unit, the analysis electronics are integra-
ted in the transformer housing, the operating and display panel is in one of the shelf floors or in the
media floor (symbio-cart). Both components are connected to each other by means of an interface
cable located in the vertical profile or in the media column (symbio-cart).
Control panel of the earth-leakage-guard (optional):
1 Power on control (green)
2 Signals exceeding dielectric resistance (yellow)
3 Signals exceeding temperature (yellow)
4 Reset-button for fault release
5 Test-button starting self-test function manually
3.6.2 Application requirements
The earth-leakage-guard monitors the dielectric resistance for equipment (where safety
isolation is necessary) which are connected to the isolation transformers. Simultaneously,
Operating manual for mobile equipment carriers 09/2020
ELECTRICAL SAFETY
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