INFOSEC M4T, User Manual

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5.2 Complete UPS shutdown.
 Shut down the loads.
 If the system has outgoing distribution protections, switch them “Off”.
 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 (ENT), see
figure 18.
 Turn the output switch (Q2) to the “Off” position.
 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.
 Turn fuse holder switch from battery cabinet (Q8) and/or battery fuse holder switch or UPS switch (Q3) to
“Off”.
 Cut the UPS power supply and the bypass with the header board cut-off or general switch. The system will
be fully deactivated.
 Electrical discharge hazard . If after equipment shutdown, the separate battery pack(s) have to be
disconnected, wait several minutes (5 min. approx), until the electrolytic capacitors have discharged.
 The equipment is fully shut down.
5.3 Emergency power off (EPO) operation.
Emergency Power Off (EPO) is equivalent to a complete unit system halt:
 All UPS converters are turned off (rectifier and inverter off).
 No output voltage is supplied to the loads.
This function can be commanded through 2-way connector (X50).
See table below for the operation:
E.P.O. function
Activation
(perform System Halt)
Return to normal mode.
Terminals (X50) .
Normally closed circuit by
means of the cable bridge
provided (it allows an
external switch (EPO)).
Remote button or switch has to be
opened permanently on the
terminal strip
(X50) .
The equipment has to be shut down
and fully de-energised (turn off all
switches), wait until the DC bus is
discharged (all LEDs and LCD have to
be turned off).
The equipment has to be started up
according to section
“5.1.2. Start-up procedure”.
Table 3. Emergency Power Off (EPO) operation.