0100037-J0 Rev D
14
User Guide
Cordex HP 2.4kW / 3.0kW Modular Switched Mode Rectifier
4.1.4 Over temperature protection
Blockage or obstruction to the air flow can result in the internal temperature to rise and reduce the output power
or even shut down the rectifier. The rectifier will resume normal operation when the temperature reduces to a safe
level. Over temperature shut down can also occur when a fan failure has occurred. The rectifier; to protect itself
from ambient over temperature scenarios; will limit its output power.
4.1.5 AC input power derating
The 3.0kW rectifier power varies with different input voltages. This is to reduce the chance of having an AC input
breaker trip from drawing the same amount of power at lower input voltages.
4.1.6 AC inrush/transient suppression
To prevent a surge on the AC input line, the inrush current of a rectifier module is limited to the full load steady
state line current. Modules are also protected from input lightning and transient surges in accordance with ANSI/
IEEE C62.41 Category B3 standards.
4.1.7 Soft start
A soft start feature is used to eliminate an instantaneous demand on the AC power source. A soft start, sometimes
referred to as a “current walk-in”, works by gradually (up to five seconds) ramping up the DC output current limit from
zero to the actual or defined customer setting. The rectifier output voltage is ramped from the minimum voltage to the
float voltage.
This feature along with Start Delay prevents any instantaneous surge demand on the utility.
-40, 100%
0, 100%
55, 100%
65, 67%
75, 20%
75, 0%
0%
20%
40%
60%
80%
100%
120%
-50
-30
-10
50
70
% Ou
tp
ut
Po
we
r
10
30
Internal Ambient Temperature °C
3.0kW Output Power vs
.
Temperature
3.0kW Output %
90, 0%
90, 40%
120, 58%
187, 100%
208, 100%
240, 100%
277, 100%
300, 100%
0%
20%
40%
60%
80%
100%
120%
80
130
180
230
280
330
%
Out
pu
t Pow
er
Input Voltage (Vac)
3.0kW Output %
3.0kW Output %
Summary of Contents for Cordex HP CXRF 48-2.4kW
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