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NetSure Rectifier Module User Manual (UM1R243000 / 11BJ1307WA)
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Rev. G
7
INTRODUCTION
Overview
The rectifiers provide load power, battery float current, and battery recharge current during normal operating
conditions. The rectifiers are a constant power design. The rectifiers are rated at their maximum output power.
This means that, within the normal operating ambient temperature range and input voltage range, the
maximum output power available is a constant 2500W (R24-2500) or 3000W (R24-3000). Within these
ranges, the rectifier operate 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,
rectifiers continue to operate but at derated output power levels.
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Constant Voltage Mode: For any initial output voltage setting from 23.5 to 28.5 volts, output voltage
remains constant regardless of load. This is the normal operating condition, in which loads are supplied
and batteries are float charged. Rectifiers operate in the Constant Voltage Mode unless load increases
to the point where the product of load current and output voltage is approximately 2500W (R24-2500)
or 3000W (R24-3000).
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Constant Power Mode: As load increases above approximately 2500W (R24-2500) or 3000W (R24-
3000) (non-adjustable), output current continues to increase, but output voltage decreases as required
to maintain constant output power. Rectifiers operate in the Constant Power Mode unless load
continues to increase to the point where the current limit setting is reached.
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Constant Current Mode: If load increases to the current limit setting, output voltage decreases linearly
to maintain output current at the current limit setting.
Specifications
DC Output Ratings
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Voltage: N24 volts DC, Negative Ground. Output voltage is adjustable from 23.50 to 28.50 volts
DC via the associated controller.
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Current (One 2500W Rectifier Module): 87.7A at 28.5VDC to 104.2A at 24.0VDC.
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Current (One 3000W Rectifier Module): 105.3A at 28.5VDC to 125.0A at 24.0VDC.
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Power (One Rectifier Module): 2500W or 3000W at Vout ≥24VDC.
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Output Characteristics: The relationship between output voltage and current is depicted graphically in
the following illustrations.