Aethon Inc. AEC2SOMENC1 Manuel D’Utilisation
Facility and Information Systems Requirements
TUG
®
Implementation Manual
14
Charging Base and TUG Electrical Safety Considerations
Charging Base
The TUG Charging Base is a Class I power supply and, as such, requires an
Earth safety ground connection provided by the AC power cable. The output of
the Charging Base is +29VDC +/- 1V which meets the definition of IEC Extra-low
Voltage (<50VAC and <120VDC).
The TUG Charging Base is a Class I power supply and, as such, requires an
Earth safety ground connection provided by the AC power cable. The output of
the Charging Base is +29VDC +/- 1V which meets the definition of IEC Extra-low
Voltage (<50VAC and <120VDC).
TUG on Charging Base
When the TUG is on the Charging Base. it is classified as a Class III PELV
(Protected Extra-low Voltage) system, as an Earth ground connection is made
through the Charging Base. The maximum voltage in the TUG is the Charging
Base output in this configuration (nom 29V).
When the TUG is on the Charging Base. it is classified as a Class III PELV
(Protected Extra-low Voltage) system, as an Earth ground connection is made
through the Charging Base. The maximum voltage in the TUG is the Charging
Base output in this configuration (nom 29V).
TUG Standalone
When the TUG is not on the Charging Base, it is classified as a Class III SELV
(Safety Extra-low Voltage) system, without an Earth ground connection. The
maximum voltage in the TUG is the battery voltage in this configuration (nom
24V, max 29V).
When the TUG is not on the Charging Base, it is classified as a Class III SELV
(Safety Extra-low Voltage) system, without an Earth ground connection. The
maximum voltage in the TUG is the battery voltage in this configuration (nom
24V, max 29V).
IEC 61140 definitions:
• ELV is classified as <50Vac rms and <120Vdc.
• SELV is classified as "an electrical system in which the voltage cannot
exceed ELV under normal conditions, and under single-fault conditions,
including earth faults in other circuits".
including earth faults in other circuits".
•
PELV is classified as "an electrical system in which the voltage cannot
exceed ELV under normal conditions, and under single-fault conditions,
except earth faults in other circuits".
exceed ELV under normal conditions, and under single-fault conditions,
except earth faults in other circuits".