1 General
The external, manually operated bypass unit is an option for the PROTECT B., C. and C.R UPS series. It is used for isolating the UPS, for example for maintenance purposes, whilst the connected loads continue to be supplied without interruption. Furthermore, an additional switch setting permits UPS test operation.
Scope of delivery:
♦External bypass unit MBS 2000 or MBS 3000
♦4 adhesive pads for attaching to the tower model
♦2 brackets for 19" rack mounting
♦4 screws for attaching the brackets to the bypass
♦2 connection cables to the UPS
♦Operating instructions
Prerequisites:
♦AEG PROTECT B., PROTECT C. or PROTECT C.R UPS series
2 Description
The external bypass is used for changing over between:
"NORMAL" operation (default switch position), i.e. secure load supply with UPS
"TEST" operation (service position), i.e. load supply directly from the mains,
additional mains supply to the UPS for service purposes.
"BYPASS" operation (bypass position), i.e. load supply directly from the mains, additional complete isolation of the UPS
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.
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