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NetSure™ IPE SERIES Rectifier Installation & User Manual (UM1R481000CNA)
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Rev. F
12
Rectifier Overview
The rectifier provides load power during normal operating conditions. The rectifier is a constant power design.
The rectifier is rated at its maximum output power. This means that, within the normal operating ambient
temperature range and input voltage range, the maximum available output power is a constant 1000 W. Within
these ranges, the rectifier operates in one of three modes, depending upon load demands. Transition between
modes is completely automatic. If ambient temperature rises above or input voltage falls below acceptable
values, the rectifier continues to operate but at derated output power levels.
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Constant Voltage Mode: For any initial output voltage setting from -42 VDC to -58 VDC (factory set
at -54 VDC), output voltage remains constant regardless of load. This is the normal operating condition,
in which loads are being supplied. The rectifier operates in the Constant Voltage Mode unless load
increases to the point where the product of load current and output voltage is approximately 1000 W.
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Constant Power Mode: As load increases above approximately 1000 W (non-adjustable), output current
continues to increase, but output voltage decreases as required to maintain constant output power. The
rectifier operates in the Constant Power Mode unless load continues to increase to the point where the
current limit setting is reached.
•
Constant Current Mode: If load increases to the current limit setting, output voltage decreases linearly
to maintain output current at the current limit setting.
Rectifier Specifications
The specifications are for a single unit only, unless otherwise noted.
DC Output Ratings
1.
Voltage: -42 VDC to -58 VDC, positive ground. Output voltage is factory set at -54 VDC.
2.
Output Power and Current:
a)
1000 W (20.83 A) @ 200 VAC to 250 VAC input and -48 VDC output.
b)
700 W (14.58 A) @ 120 VAC input and -48 VDC output.
3.
Output Characteristics: Refer to
for a graph of output voltage vs. output current.
Figure 1:
Output Voltage vs. Output Current
4.
Power Derating Based on Input Voltage: The rectifier power varies with changes in input voltage. It
uses an advanced power limitation method. The lower input threshold is 85 VAC. The rectifier can
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Output Current (A)
Output Voltage vs. Output Current
at Maximum Power 1000 W
