GE Industrial Solutions CPS6000 - Manual (Page 138)

CPS6000 –48V Indoor/Outdoor Power Shelf
Issue 21 January 2008
138
Features and Functions
QS86xA Output Power Curve
The following graph shows the QS86xA rectifier output power curve. This curve is valid for
both low-line and high-line operation. Use the table following the curve for the current levels
at key voltage levels. The rectifier can deliver constant power to approximately 48Vdc.
Further loading of the rectifier will result in the rectifier operating in the constant-current
mode. If the rectifier is loaded below approximately 36V, the rectifier enters the hiccup mode.
During start-up, the rectifier can deliver an increased amount of current as specified at point
C. Point B is the nominal operating point.
Point D is the internal thermal threshold beyond which the rectifier shuts down to protect
itself. Point D is not based on constant power.
Figure 8-2: QS86xA Power Curve
Output Voltage
The rectifier’s output voltage is factory set to 52.0V. The voltage may be changed by the
system controller. Note that the rectifier will remain at the last voltage it was set to should the
system controller fail or be removed.