Lucent Technologies 1200A 24V ECS Battery Plant J85500E-2
3 - 2 Engineering, Planning, and Ordering
Issue 7 October 1998
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Load Equipment Voltage
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Battery Voltage
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Load Drain and Growth
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Reserve Capacity
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Charge Capacity and Recharge Time
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Battery String Balancing
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Voltage Drop Calculations
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Conductor Sizing
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Overcurrent Protection
Load Equipment
Voltage
Determine the recommended operating voltage range of the
using equipment. If the battery plant is used to power different
types of equipment, it must meet the requirements of each. Fill
in the load voltage information below. The answers to these
questions will be used in engineering calculations and
equipment selection in the following sections.
a. Recommended operating voltage: ______ volts
b. Minimum steady-state voltage: ______ volts
c. Maximum steady-state voltage: _____ volts
d. Maximum high voltage transient: ______ volts
e. Can the load be damaged by low input voltage?
_____ (yes or no)
If the answer to (e) is yes, low-voltage Load disconnect
provisions may be necessary. It is important to distinguish
between low-voltage disconnects for batteries and for loads.
Low-voltage battery disconnect does NOT protect load
equipment from low input voltage. Load and battery disconnect
features are not available on all types of battery plants.
Battery Plant
Voltage
Battery plant operating voltage is directly related to the
recommendations of the battery manufacturer. These
recommendations must include:
•
the steady-state voltage for maximum life or Float Voltage,
•
the End Voltage after complete discharge,
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the maximum recharging voltage, and
•
the initial charging method.
Equalize or Boost charging is recharge capacity greater than the
float voltage.
