Raised Floor Installation; Battery Location - Liebert 7400 Series User Manual

7400 Series UPS User Manual
Single Module and One plus One Systems
3.1.2 Raised floor
installation
to the floor.
3.1.3

Battery Location

6310018a.02.doc
If the equipment is to be located on a raised floor it should be mounted
on a pedestal suitably designed to accept the equipment point loading.
The installation diagrams in the back of this manual identify the location
of the holes in the base plate through which the equipment can be bolted
Note: Temperature is a major factor in determining the battery life and
capacity. Battery manufacturers quote figures for an operating
temperature of 20°C. Operating above this temperature will reduce the
battery life, operation below this temperature will reduce the battery
capacity. On a normal installation the battery temperature is maintained
between 15°C and 25°C.
In 80kVA and 120 kVA module installations the batteries associated
with the UPS equipment are usually contained in a purpose-built battery
cabinet which sits alongside the main UPS equipment. Sealed,
maintenance-free batteries are normally used in this type of installation.
Due to their increased capacity, the batteries associated with larger UPS
installations are usually too big to be mounted in a single cabinet and are
either rack mounted or fitted in multiple, or bespoke, battery cabinets.
Such installations may utilise non-sealed lead acid cells, requiring
regular attention and impose their own environmental requirements.
Pedestals are required for the battery cabinets when they are located on
raised floors, in the same way as for the UPS cabinets.
The batteries are connected to the UPS through a circuit breaker which is
manually closed and electronically tripped via the UPS control circuitry.
If the batteries are cabinet-mounted this circuit breaker is fitted within
the cabinet; however, if the batteries are rack-mounted or otherwise
located remote to the main UPS cabinet then the battery circuit breaker
must be mounted as near as possible to the batteries themselves, and the
power and control cables connected to the UPS using the most direct
route possible. Liebert offer a purpose-designed remote battery circuit
breaker box, containing the circuit breaker and its necessary control
board, as a standard option kit.
Chapter 3 - Installation Procedure
Introduction
(02/98) LCA 10/01
3-3
Issue 2