Table of Contents
Advertisement
Chapter 12 Helpful information
The only sure way to determine battery capacity is to perform a battery run-down test. The
module is taken off line, connected to a load bank and operated at rated power until the
specified runtime elapses or the unit shuts down due to low battery voltage. If battery capacity
is less than 80 percent of its rated capacity, the battery should be replaced.
Thermal scanning of battery connections during the battery run-down test identifies loose
connections. This test gives you the chance to see the battery during an extended, high-current
discharge. Scanning should take place during discharge and recharge cycles.
An effective UPS battery maintenance program must include regular inspections, adjustments
and testing, with thorough records kept of all readings.
Spot replacement of batteries
Batteries in series are similar to a string of holiday lights. When one unit fails, the entire string
no longer works. When a battery or group of batteries connected in a series ceases to work,
not only is the battery string no longer functional, but it can be difficult to determine which
battery has failed.
While the four factors affecting battery life play a large role in determining when a battery is
vulnerable to failure, there's no precise way to ensure that battery failure can be predicted. The
only way to identify bad batteries early enough for spot replacement is through continuous
battery monitoring and scheduled maintenance. Once a battery fault has been reported,
replace all batteries in the base UPS unit and in all attached EBMs, if any are attached.
Lead-acid batteries: good for the environment?
Which commonly used product has the highest rate of recyclability? Paper? Only 73 percent of
paper is recycled for reuse. Aluminum at 54 percent and glass at 25 percent also fall short of
the leader. More than 96 percent of all battery lead is recycled. Lead-acid batteries top the list
of most highly recycled consumer product.
The processes for lead-acid battery recycling support agriculture needs and enhance energy
conservation. Beyond the successful reuse of nearly 100 percent of the battery components,
lead recycling facilities harness radiant heat from their furnaces to offset traditional heating
costs. Residual sulfur trapped during recycling is processed into fertilizer. Even the plastic
casings are crushed into pellets and are used to manufacture new battery covers and cases.
Recycling lead is also more energy efficient than smelting or mining new lead. The recycled
lead can be refined into new alloy repeatedly, giving it unmatched sustainability and cost
stability - a trait unlike most raw materials.
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
239
Advertisement
Table of Contents
