GE Industrial Solutions CPS6000 - Manual (Page 192)

CPS6000 –48V Indoor/Outdoor Power Shelf
Issue 21 January 2008
192
Figure B-1: Slope Thermal Compensation
The following describes the configuration parameters which may be activated or altered by
the user. Refer to Appendix B for the ranges of values the parameters may take and their
factory default settings.
Lower Thermal Limit (ltt): The lower temperature where, if Low Temperature
Compensation is enabled, the controller will increase plant voltage to a level corresponding to
(lsp * (ntt - ltt)* 24)V above the fsp. Plant voltage will be increased proportionally at any
temperature between this point and the Battery Thermal Slope Nominal Temperature (ntt).
Low Temperature Compensation Enable (rve): A 0 disables and 1 enables the Low
Temperature Thermal Compensation feature. Since rve increases plant voltage rather than
decreasing it based on temperature, the option is provided to disable it separately from the
entire feature so that equipment loads sensitive to high voltages can be protected.
Lower Temperature Slope (lsp): The slope rate for the voltage increase per cell when the
battery temperature is below the ntt (Battery Thermal Slope Nominal Temperature).
Battery Thermal Slope Nominal Temperature (ntt): The zero compensation temperature
point. Temperatures monitored between this point and the Upper Temperature Limit (utt) will
result in a proportional decrease of plant voltage to a level corresponding to (usp*(utt-
ntt)*24)V below the fsp at the utt. If Low Temperature Compensation is enabled,