Vertiv
™
| Liebert® EXL™ 625-1100kVA Installation Manual | Rev. 3 | 02/17 14
When sizing battery cables, a maximum voltage drop of 2VDC is permissible at the current ratings given in
Table 17.
The following are guidelines only and are superseded by local regulations and codes of practice where
applicable:
• The grounding conductor should be sized according to the fault rating, cable lengths, type of protection, etc. The grounding
cable connecting the UPS to the main ground system must follow the most direct route possible.
• Consideration should be given to the use of paralleled smaller cables for heavy currents, as this can ease installation
considerably.
• AC and DC cables must be run in conduits according to local codes, national codes and standard best practices. This will
prevent creation of excess EMI fields.
2.3 SIZING THE INPUT BREAKER FEEDING A LIEBERT EXL UPS
Nominal input current (considered continuous) is based on full-rated output load. Maximum current includes
nominal input current and maximum battery recharge current (considered noncontinuous). Continuous and
noncontinuous current are defined in the NEC.
Maximum input current is controlled by the current limit setting, which is adjustable. Values shown are for default
current limit of 125%. If a smaller input feed breaker is used, the input current limit can be adjusted; see your
Vertiv representative for more information. The input current limit should not be set less than 105% of the
current needed to support the inverter at full load for normal operation. This results in sufficient power to
recharge the battery in a reasonable time and to operate over the published input voltage range.
2.3.1 Power Cable Connection Procedure
The rectifier input, bypass, output and battery power cables (all require lug-type terminations) are connected to
busbars in the I/O sections (refer to 4.0 - Installation Drawings).
Equipment Ground
The equipment ground busbars are in the I/O sections (refer to 4.0 - Installation Drawings). The grounding
conductor must be connected to the ground busbar and bonded to each cabinet in the system.
All cabinets and cabling should be grounded in accordance with local regulations.
AVERTISSEMENT
Risque de décharge électrique pouvant causer des blessures graves, voire mortelles.
Avant de procéder au câblage du système ASC, assurez-vous que vous êtes au courant de l’emplacement
et du fonctionnement des isolateurs externes qui raccordent l’alimentation d’entrée ou de dérivation au
panneau de distribution électrique.
Vérifiez que ces raccords sont isolés électriquement et installez tous les panneaux d’avertissement
nécessaires pour empêcher leur utilisation accidentelle.
NOTE
Proper grounding reduces problems in systems caused by electromagnetic interference.
WARNING
Failure to follow adequate grounding procedures can result in electric shock hazard to personnel, or the
risk of fire, should a ground fault occur.
All operations described in this section must be performed by properly trained and qualified electricians
or technical personnel. If any difficulties are encountered, contact Vertiv. See the back page of this
manual for contact information.
To Next Page
Loading...
Need help?
General
