26
INFOSEC UPS SYSTEM - 4, rue de la Rigotière - 44700 Orvault - FRANCE - www.infosec-ups.com
Hot Line – Tel + 33 (0)2 40 76 15 82 - Fax + 33 (0)2 40 94 29 51 - [email protected] – 03 11 AA AA 201 18
5.4
Bypass manual switch (MAINTENANCE).
5.4.1
Operating principle.
The UPS integrated manual bypass is a very useful feature, but undue use can have irreversible consequences
both for the UPS and for the loads connected to its output. It is therefore important to handle it as described in
the following paragraphs.
5.4.2
Transfer to maintenance bypass.
Procedure for passing from normal operation to maintenance bypass:
Shut down the inverter. Go down to the “CONTROL & STATUS OF THE UNIT” submenu (screen 1.0) using
the control panel keypad ((3) from figure 19), and then right once only. Screen 1.3 will appear asking you
to shut down the unit by pressing (ESC). Do so, and then confirm the operation by pressing (
ESC
). Do so,
and then confirm operation by pressing (
ENT
), see figure 18.
Remove the screws fastening the mechanical block (
BL
).
Remove the mechanical block (BL) of the manual bypass switch (Q5) and set it to the “On” position.
Set the output switch (
Q2
) to the “Off” position.
Set the Battery Fuse Holder or battery switch (
Q3
) to “Off”. In addition, in models with independent battery
pack(s) also turns Battery Fuse Holder (
Q8
) of each pack to “Off”.
In standard M4T units, set the input switch (
Q1a
) to the “Off” position.
In M4T-B units, set the input switch (
Q1a
) and static bypass switch (
Q4
) to the “Off” position.
The UPS supplies output voltage directly from the mains through the manual bypass in M4T units or from the
mains of the static line bypass in the version M4T-B units, through the manual bypass. The UPS is fully shut
down and inactive.
5.4.3
Transfer to normal operation
Procedure for passing from maintenance bypass to normal operation:
In standard M4T units, set the input switch (
Q1a
) to the “On” position.
In M4T-B units, set the input switch (
Q1a
) and static bypass switch (
Q4
) to the “On” position.
Set the output switch (
Q2
) to the “On” position.
Set the manual bypass switch (
Q5
) to the “Off” position and refit the mechanical block (BL) and the screws
(
t2
).
It is an essential safety requirement, for the life of the UPS and the loads connected to it, to refit the
mechanical block (
BL
) as this avoids dangerous handling.
Start up the inverter. Go down to the “CONTROL & STATUS OF THE UNIT” submenu (screen 1.0) using the
control panel keypad ((3) from figure 19), and then right once only. Screen 1.1, asking you to start the unit
up by pressing (
ENT
). Do so, and then confirm operation by pressing (
ENT
) again. See following screen
diagram (figure 18).
The UPS supplies output voltage entirely protected against voltage variations, electric noise, etc.
Summary of Contents for M4T
Page 1: ...User Manual 10 80 kVA ...
