Battery Installation
Liebert
®
NX
™
23
4.0 BATTERY INSTALLATION
4.1 Introduction
If using multiple sets of batteries connected in parallel to provide the required battery backup run
times, fit each set with an isolating device to permit working on one of the battery sets while leaving
the others in service and providing backup protection.
When replacing batteries, replace with the same manufacturer and type, or equivalent. See your
Emerson representative for a list of approved batteries.
4.2 Safety
Special care should be taken when working with the batteries associated with the Liebert NX
™
system equipment. When all batteries are connected together, the battery terminal voltage may
exceed 480V and is POTENTIALLY LETHAL.
WARNING
Risk of electric shock. Can cause injury, property damage and death.
Special care should be taken when working with the batteries associated with this equipment.
Batteries are always live. Battery terminal voltage will exceed 480VDC and is potentially
lethal.
In addition to the hazard of electric shock, gas produced by batteries can be explosive and
sulfuric acid can cause severe burns.
Batteries should be installed, serviced and replaced only by properly trained and qualified
service personnel trained in safe battery handling methods and who have the correct PPE
(Personal Protection Equipment) and tools.
The following precautions should be observed when working with the batteries:
• Eye protection should be worn to prevent injury from electrical arcs.
• Remove rings, watches and all other metal objects.
• Use only tools with insulated handles.
• Wear rubber gloves and boots.
• When replacing batteries, replace them with the same type and number of batteries or bat-
tery packs.
• Do not dispose of batteries in a fire. The batteries may explode.
• Do not open or mutilate batteries. Released electrolyte is harmful to the skin and eyes. It is
toxic.
• Never lay metal objects of any type on top of the batteries.
• Disconnect the charging source before connecting or disconnecting battery terminals.
• Determine whether the battery is grounded. If the battery is grounded, remove source of
the ground. Contact with any part of a grounded battery can result in electrical shock. The
likelihood of such shock can be reduced if such grounds are removed during installation and
maintenance.
CAUTION
Risk of explosion and fire. Can cause property damage, injury and death.
To reduce the risk of fire, connect only to a circuit provided with correct amperes maximum
branch circuit overcurrent protection (see Table 12) in accordance with the National Electric
Code, ANSI/NFPA 70.
NOTE
The maximum available fault current from the battery supply is 8500A and the DC voltage
rating of the battery supply overcurrent protective device that is to be installed near the battery
supply must be at least 600VDC.
To Next Page
Loading...
Need help?
General
