Alpha Technologies CXPS 48-1.2-225 48 Vdc - Manual (Page 37)

053-691-B1 Rev E Page 29 of 33
7.2 Main rectifier modes
In addition to Main Rectifier States, there is a set of Main Rectifier Modes. These modes can be divided into two
categories as follows:
7.2.1 Output voltage modes
Voltage modes can be thought of as modes that, under software control, can directly adjust the output voltage.
There are processes that occur in the rectifier that can change the output voltage without software control, for
example when the rectifier is at the current limit. The following table lists the four output voltage modes and a
description of when they are active:
Output Voltage Modes Active when…
Float Output voltage is set to the float voltage setting.
Equalize Output voltage is set to the equalize voltage setting.
Battery test Output voltage is set to the battery test voltage setting.
Safe Output voltage is set to the safe mode voltage setting.
Table D–Output voltage modes
7.2.2 Output current/power modes
The output current/power modes directly affect the output current and power. The following table lists the four
output current/power modes and a description of when they are active:
Output Current/Power Mode Active when…
Temperature foldback mode Output current and power limit have been reduced because of high
temperature of the heat sink or internal ambient temperature sensor.
AC foldback mode Output current and power limit have been reduced because of low AC input
voltage. This reduces the risk of tripping an AC breaker because of increased
AC current draw as the AC voltage decreases.
Short circuit foldback mode Output current limit has been reduced because of a short circuit at the output.
Internal fault foldback mode Output current limit has been reduced because of an internal fault.
Table E–Output current/power modes
7.3 Factory ranges and defaults
The following table lists the rectifier settings/ranges/defaults. Values can be adjusted via the controller:
Setting Range (minimum to maximum) Default
Float (FL) voltage 48 – 58 V 54 V
Equalize (EQ) voltage 50 – 58 V 55 V
Battery Test (BT) voltage 44 – 52 V 46 V
Safe mode voltage 46 – 56 V 51.4 V
OVP 59 V, cannot be set below present system FL/EQ/BT 57 V
Current limit (CL) 23 – 100% 100%
Power limit (PL) 0 – 100% 100%
Module start delay 0 – 250 s 1 s
System start delay 0 – 600 s 0 s
Low voltage alarm (LVA) 42 – 52 V 44 V
High voltage alarm (HVA) 52 – 59 V 55.5 V