Vertiv Liebert EXM - 6.0 OPERATION

Vertiv™ | Liebert® EXM
™
50-250kVA, 480V, 60Hz User Manual | 54
6.0 OPERATION
The Liebert
®
EXM
™
operates in the modes shown in 6.4 - Liebert® EXM™ Operating Modes. This
section describes various kinds of operating procedures under each operating mode, including
transfer between operating modes, UPS setting and procedures for turning on/off inverter. As
shown in SL-25656, the Liebert
®
EXM
™
Battery Cabinet manual, the AC utility source is supplied
through the input breaker, and the rectifier converts the alternating current into DC power. The
inverter converts the AC power from the utility—or DC power from an optional External Battery
Cabinet—into AC power for the load. The batteries power the load through the inverter in the
event of a power failure. The utility source can also power the load through the static bypass. If
maintenance or repair of the UPS is necessary, the load can be switched without interruption in
service using the optional Liebert
®
MBC
™
.
WARNING
Risk of electrical shock. Can cause personal injury or death. This UPS has several circuits
that are energized with high DC as well as AC voltages. Check for voltage with both AC and
DC voltmeters before working within the UPS. Check for voltage with both AC and DC
voltmeters before making contact.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,
shoes and glasses should be involved in installing the UPS or preparing the UPS for
installation. When performing maintenance with any part of the equipment under power,
service personnel and test equipment should be standing on rubber mats.
AV E RT I S S M E N T
Risque de décharge électrique pouvant causer des blessures graves, voire mortelles. Ce
système ASC comporte plusieurs circuits à haute tension c.a et c.c. Vérifiez les tensions au
moyen de voltmètres c.a. et c.c. avant d’utiliser le système ASC. Vérifiez les tensions avec
des voltmètres c.a. et c.c. avant d’établir tout contact.
Seuls des employés qualifiés et dûment formés portant un casque, des gants, des
chaussures et des lunettes de sécurité adéquats doivent se charger d’installer le système
ASC ou de le préparer pour l’installation. Les responsables de l’entretien et l’équipement
d’essai doivent reposer sur des tapis de caoutchouc lors de toute intervention sur une
pièce d’équipement sous tension.