Brochures and Data Sheets

User Instructions UM1R483500E
Spec. No. 1R483200 (Model R48-3200) Issue AG, November 20, 2012
Spec. No. 1R483200E (Model R48-3200E)
Spec. No. 1R483500E (Model R48-3500E)
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TABLE OF CONTENTS
Introduction .......................................................................................................................... 1
Overview ....................................................................................................................... 1
Specifications ................................................................................................................ 2
Operation ........................................................................................................................... 17
AC Input Protection Device Requirements/Recommendations .................................. 17
Local Indicators ........................................................................................................... 17
Rectifier High Voltage Shutdown and Lockout Restart ............................................... 18
Installing Rectifiers ...................................................................................................... 18
Troubleshooting and Repair .............................................................................................. 19
Troubleshooting .......................................................................................................... 19
Replacement Procedures ........................................................................................... 21
Revision Record ................................................................................................................ 24
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 3200W or 3500W (depending on Rectifier model). 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 3200W or
3500W (depending on Rectifier model).
 Constant Power Mode: As load increases above approximately 3200W or 3500W
(depending on Rectifier model) (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.