Salicru SLC ADAPT, User Manual

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6.3.2.  Manual bypass panel with two or more UPS’s.

•

Put all the UPS’s 

on bypass (inverters «Off»)

, according 

to the procedure stated in the «User’s, installation and start 

up manual» of the UPS.

 It is essential 

to shutdown the inverters 

of the 

UPS’s before proceeding, otherwise a short-circuit at 

its output will be made with unexpected and unintended out-

comes for any part of the set (UPS’s, panel and loads).

•

Remove the mechanical lock from the switch labelled as 

«MANUAL BYPASS» in the bypass panel and turn it «On». 

Keep the mechanical lock in a safe place, because it will 

have to put it back, once the maintenance or fixing tasks 

have been finished.

•

Manual bypass panels with isolation transformer, the loads 

will be supplied with a clean and/or attenuated voltage 

from electrical noises.

•

Turn the «UPS 1 INPUT» to «UPS N INPUT» and «UPS 

1  OUTPUT» to «UPS N OUTPUT» switches of the bypass 

panel to «Off». In case of including the separate bypass line 

(-B), turn the «UPS 1 STATIC BYPASS» to «UPS N STATIC 

BYPASS» switches of the bypass panel «Off» too. In the 

illustration of Fig. 14, it is shown the position of switches 

once the manoeuvring has been done.

UPS 1 INPUT

UPS 1 STATIC BYPASS

MANUAL BYPASS

UPS 1 OUTPUT

Off

Off

On +

Off

•••

UPS N INPUT

Off

•••

UPS N STATIC BYPASS

Off

UPS N OUTPUT

Off

•••

Fig. 14. 

Position of the bypass panel switches in «Mainte-

nance operating» (with several UPS’s).

•

Loads are supplied by mains directly through the manual 

bypass panel and UPS’s are completely shutdown, so they 

are ready to be serviced for a preventive maintenance, 

fixing or replacement for another equipment with the same 

specifications.

•

In case of faulty UPS, it can also be removed and sent to the 

factory for its fixing. This option is valid when the power of the 

equipments, which are still installed is enough to supply the 

loads. Even it is unlikely but not impossible,  any new fault in any 

of the remaining equipments and the possible consequences 

that could happen will be assumed.

 Even, if this alternative is going to be done, it is man-

datory to remove any cable bundle connected to the 

panel, which has at its opposite end the cables bare from 

isolation, resulting in a risk of electrocution or short-circuit in 

case of turning on any of the panel switches.

6.4.  SHIFTING FROM «MAINTENANCE OPERATING» (LOADS 

SUPPLIED THROUGH THE MANUAL BYPASS) TO 

«NORMAL OPERATING» (LOADS SUPPLIED BY THE UPS 

OR UPS’S).

6.4.1.  Manual bypass panels with one UPS only.

•

Once the preventive maintenance, fixing or UPS replacing 

tasks have been finished, loads must be shifted to UPS, but 

checking the following points previously:

ˆ

UPS switches are turned «Off».

ˆ

Bypass panel switches, less the «MANUAL BYPASS»  

switch are turned «Off».

•

Turn the «UPS INPUT» and «UPS OUTPUT» switches of the 

bypass panel to «On». In case of including the separate 

bypass line (-B), turn the «STATIC BYPASS» switch of the 

bypass panel «On» too.

•

Turn the «MANUAL BYPASS» switch of panel bypass to 

«Off» and put the mechanical lock back.

For safety it is mandatory to put back the mechanical 

lock before proceeding with the operating.

•

In the illustration of Fig. 15 it is shown the position of the 

panel switches after doing the manoeuvring of this point.

•

Start the UPS up according to the procedure stated in the 

«User’s, installation and start up manual» of the equipment. 

The bypass panel supplies voltage to the terminals labelled 

as «LOADS OUTPUT» to the loads from UPS.

UPS INPUT

STATIC BYPASS

MANUAL BYPASS

UPS OUTPUT

On

On

Off +

On

Fig. 15. 

Position of the bypass panel switches in «Normal 

operating» (with one UPS only).

USER'S MANUAL