PowerWalker VFI 10000TCP 3_1 - Manual (Page 51)

48
6.5 Backfeed Protection
To support protection against UPS backfeeding a new logic is integrated
into PowerWalker VFI 10000-20000TP 3/1 model. But in PowerWalker
VFI 10000TCP 3/1 model
，
there’s no this function.
Using backfeed protection
On customers side an additional external isolation device (magnetic
contactor, MC or minimum voltage tripping device) must be provided as
shown in Fig. 6-3. The isolation device must be able to carry the UPS
input current (see resp. table of basic UPS operating instructions).
The isolation device has to be installed in the bypass source path.
Cabling of the backfeed terminals contains a jumper and two cables to
the optional external isolation device.