3
2 Description
UPS Bypass Switch
USV Handumgehungsschalter
Achtung: Bedienungs-
anleitung beachten!
Attention: Refer to
operation instructions
UPS
UPS
UPS
NORMAL
SERVICE
BYPASS
Bypass
Test
Normal
Bypass
Test
Normal
The external bypass is used for changing over between
¾
"NORMAL" operation (default switch position),
i.e. secure load supply with UPS back-up.
¾
"TEST" operation (service position),
i.e. load supply directly from the mains,
additional mains supply to the UPS for service purposes.
¾
"BYPASS" operation (bypass position),
i.e. load supply directly from the mains,
additional complete isolation of the UPS
(Attention! UPS output may still be live due to its internal
voltage source!)
If there is a mains failure during "TEST" and "BYPASS"
operation then the supply to the connected loads will be
interrupted.
IMPORTANT:
UPS must be switched to “BYPASS” operation,
if external bypass switch will be operated !
(refer to the UPS operating instructions)
3. Installation
(mechanical)
During subsequent installation in the rack, take care that the unit is
located close to the UPS so as firstly to establish the causal
connection between the two and secondly to facilitate connection
and subsequent replacement of the UPS.
