Liebert Hinet 10kVA - UPS Switch-off Procedure; Manual Bypass Operation

Hinet UPS User Manual
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5.2.4 Hinet UPS switch-off Procedure
Warning: the following instructions permit to switch OFF without having the load being supplied.
Refer to next paragraph reporting all those circumstances whereby Hinet has to be excluded while still keeping load
supplied.
To switch off Hinet proceed to operate the switches following the order given below:
1. Open the UPS door to gain access to the main power switches.
2. switch off UPS OUTPUT switch ? ;
3. switch off BATTERY switch ? ;
4. switch off INPUT RESERVE switch ? ;
5. switch off INPUT MAINS switch ?.
To completely isolate the UPS from the AC supplies, the main external power input isolator (both isolators, where
separate supplies are provided for rectifier and bypass ) must be opened.
On the primary input distribution panel, which is often located distant from the UPS area, a label must be posted
advising service personnel that the UPS circuit is under maintenance.
5.2.5 Manual bypass procedure
This procedure must be followed to transfer the load from the UPS inverter output to the maintenance bypass system.
This may be required during UPS maintenance procedures.
The manual bypass allows to exclude the UPS while still keeping the load powered.
The transfer is carried out in the following manner:
1. Transfer the load on reserve line, pressing ENTER in the SWITCH LOAD display;
2. switch off the inverter, pressing ENTER in the INVERTER ON-OFF display;
3. ascertain that the buzzer alarm has activated and that the ALARM and BY-PASS ON LED lights up;
4. remove the mechanical lock from the MAINTENANCE BYPASS switch ? and lift the switch lever;
5. switch off OUTPUT switch ?;
6. switch off BATTERY switch ? ;
7. switch off INPUT RESERVE switch ?;
8. switch off INPUT MAINS switch ? .
Ascertain that the load continues to be powered from mains while the UPS is switched off.
WARNING
The following terminals will be live within the UPS:
?? Bypass a.c. input supply terminals
?? Maintenance Bypass power switch ?
?? UPS output terminals
?? Input/output RF Filters
Input and output terminals remain protected by a protection panel.
The load is now supplied by mains only through manual bypass.
NOTE
Note: The load is not protected from supply aberrations when operating on the bypass mode.