Lucent Technologies 415B Battery Plant for 4ESS
3 - 2 Safety
Issue 6 September 1999
•
This equipment has been evaluated for use in a continuous
ambient temperature of up to 95 degrees Fahrenheit (35
degrees Celsius).
Precautions
When working on or using this type of equipment, follow these
precautions:
•
The 415B Battery Plant and its subsystems must be
installed, serviced, and operated only by skilled and
qualified personnel who have the necessary knowledge and
practical experience with electrical equipment and who
understand the hazards that can arise when working on this
type of equipment.
•
Because of the hazardous voltages supplied to and within
the equipment, make sure the equipment, all associated
framework, and the cable rack are properly grounded per
local job instructions before turning on any power.
•
For equipment connected to batteries, disconnecting the ac
alone will not necessarily remove power to the equipment.
Batteries may be connected in parallel with the output of the
rectifiers and at the input side of the distribution frames.
Turning off the rectifiers will not necessarily remove power
from the bus. Also, battery voltage may still be present on
one side of the output dc circuit breaker within the rectifier
even with the circuit breaker off. Make sure the battery
power is also disconnected and/or follow safety procedures
while working on any equipment that contains hazardous
energy/voltage.
•
Wear rubber gloves while working on live equipment.
•
AC voltage is present in the rectifier when the Power switch
is in the Off position, and ac is still supplied to the input of
the rectifier.
•
Hazardous dc energy (from batteries and rectifier output)
and voltages up to 140 volts are present in the rectifier and
power distribution frames. Use a voltmeter to insure no
voltage, or the expected voltage, is present before
contacting any uninsulated conductor surface. Follow the
procedures in the order given to minimize dangerous
encounters with these voltages. Exercise extreme caution
when working near the battery bus bars.
