Product description 4
Maintenance Bypass PMC12 1 - 3 kVA
5
EN
4
Product description
Along with the connected UPS, the maintenance
bypass supports two operating modes – the UPS
mode and the bypass mode.
1. UPS mode (UPS available): When the main-
tenance bypass works in the UPS mode, the
UPS is supplied with power from the mains
(utility) and passes this on to the connected
load. In this mode, the UPS monitors the cur-
rent supply and protects the load against
power failure and voltage fluctuations.
Fig. 1 Maintenance bypass in UPS mode
2. Bypass mode (service mode): When the by-
pass is in bypass mode, the connected load is
supplied directly from the mains. In this mode,
the UPS can be switched off so that it can be
replaced or repaired. The load continues to be
supplied with power without interruption. How-
ever, the UPS in this mode does not protect
the load.
Fig. 2 Maintenance bypass in bypass mode
