SC300 Handbook
36
Copyright © 2007-2018 Eaton Corporation. All Rights Reserved.
IPN 997-00012-03 B2 Issue B2 July 2018
Configuration
Set the following parameters.
Parameter
Description
Where to find:
Cells Per String
The number of 2V cells per battery string (for
example: 24 in a 48V nominal system).
SC300: Battery > Battery
Web: Batteries
Slope
Bus voltage adjustment rate. Use the value
recommended by the battery manufacturer.
SC300: Control Processes >
Temp. Compensation >
Enable
DCTools/Web: Control
Processes > Temperature
Compensation
Reference Temp
The temperature where no voltage adjustment is
applied. Refer also to Float Voltage on page
Upper Limit
No additional voltage adjustment is made above
this temperature.
Lower Limit
No additional voltage adjustment is made below
this temperature.
If Low Float Tracking is enabled, the
Low Float
alarm threshold will be decreased by the same
amount as the temperature compensation offset. This occurs only when temperature
compensation decreases bus voltage. There is no effect when temperature compensation increases
bus voltage.
If High Float Tracking is enabled, the
High Float
alarm threshold will be increased by the same
amount as the temperature compensation offset. This occurs only when temperature
compensation increases bus voltage. There is no effect when temperature compensation decreases
bus voltage.
Peak Load Reduction (PLR)
PLR provides a means for a telecom network operator to reduce power consumption at certain
times by running on battery rather than AC power. An operator may run on batteries during
periods of high AC power grid loading, and receive direct payments from AC grid operators, or
reduced power charges. The SC300 is compatible with demand response programmes, either
manually controlled, or automatically controlled by software such as Eaton EDREM.
While PLR is active, the SC300 turns down the rectifier voltage to just below the DC bus voltage.
The batteries will discharge into the load, while the rectifiers provide a backup if the battery fails.
PLR may be set to ensure that the battery voltage does not drop below a preset voltage, the Low
Voltage Limit. This ensures the battery is not discharged so low that its life is significantly reduced.
If the Low Voltage Limit is reached, the SC300 maintains the bus voltage at that value by holding
the rectifier voltage so that it progressively takes more load as the battery discharges.
There is also an option to start a generator to recharge the battery once the Low Voltage Limit is
reached.
