Vertiv NetSure R48-2000 - Introduction; Overview; Specifications; DC Output Ratings

Vertiv | NetSure Rectifier Module User Manual (UM1R482000e / 11BU1360YY) | Rev. J
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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 available output power is a constant 2000W. Within these ranges, the rectifiers 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.
• Constant Voltage Mode: For any initial output voltage setting from 42 to 58 volts, output voltage
remains constant regardless of load. This is the normal operating condition, in which loads are being
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 2000W.
• Constant Power Mode: As load increases above approximately 2000W (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.
• 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
NOTE! A current limitation can be set by the User and the output voltage level is set through the
controller.
DC Output Ratings
• Voltage: Nominal -48.0 VDC, Positive Ground.
a) Adjustment Range: The output voltage can be set within the range of -42V to -58V, adjustable via
the controller.
• Output Power and Current:
2000W (41.7A) @ 208/240VAC Input and -48VDC Output.
1262W (26.3A) @ 120VAC Input and -48VDC Output.
• Output Characteristics:
a) Refer to Figure 1 for a graph of output voltage vs. output current for the R48-2000e rectifier.
b) Refer to Figure 2 for a graph of output voltage vs. output current for the R48-2000 and R48-2000H
rectifier.