Vertiv eSure R48-3500e3 User manual

eSure™
Rectifier Module
User Manual (UM1R483500e3), Revision H
Specification Number: 1R483500e3
Model Number: R48-3500e3

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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This document may contain confidential and/or proprietary information of
Vertiv Group Corp., and its receipt or possession does not convey any right
to reproduce, disclose its contents, or to manufacture or sell anything that
it may describe. Reproduction, disclosure, or use without specific
authorization from Vertiv Group Corp. is strictly prohibited.
© 2020 Vertiv Group Corp. All rights reserved. Vertiv™ and the Vertiv
logo are trademarks or registered trademarks of Vertiv Group Corp. All
other names and logos referred to are trade names, trademarks or
registered trademarks of their respective owners. While every precaution
has been taken to ensure accuracy and completeness herein, Vertiv Group
Corp. assumes no responsibility, and disclaims all liability, for damages
resulting from use of this information or for any errors or omissions.
Specifications are subject to change without notice.

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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TABLE OF CONTENTS
Admonishments Used in this Document............................................................4
Important Safety Instructions ..............................................................................5
General Safety ...........................................................................................................................................................5
Voltages...........................................................................................................................................................................5
AC Input Voltages........................................................................................................................................................ 5
DC Output and Battery Voltages .................................................................................................................. 5
Hazardous Voltage...............................................................................................................................................5
Handling Equipment Containing Static Sensitive Components..............................5
Static Warning...........................................................................................................6
Introduction ...............................................................................................................7
Overview..........................................................................................................................................................................7
Specifications .............................................................................................................................................................7
DC Output Ratings ...................................................................................................................................................... 7
AC Input Ratings ...........................................................................................................................................................9
Environmental Ratings ..........................................................................................................................................13
Compliance Information:..................................................................................................................................... 14
Standard Features .................................................................................................................................................... 14
Mechanical Specifications..................................................................................................................................17
Operation.................................................................................................................. 18
AC Input Protection Device Requirements/Recommendations...........................18
Local Indicators.....................................................................................................................................................18
Rectifier High Voltage Shutdown and Lockout Restart...............................................18
Rectifier Current Limit....................................................................................................................................18
Installing Rectifiers.............................................................................................................................................19
Troubleshooting and Repair................................................................................ 21
Troubleshooting ................................................................................................................................................... 21
Rectifier Current Sharing Imbalance........................................................................................................21
Rectifier Fault Symptoms and Troubleshooting...........................................................................21
Replacement Procedures........................................................................................................................... 23
Rectifier Replacement...........................................................................................................................................23
Rectifier Fan Replacement...............................................................................................................................24

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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ADMONISHMENTS USED IN THIS DOCUMENT
DANGER
! Warns of a hazard the reader will be exposed to that will likely result
in death or serious injury if not avoided. (ANSI, OSHA)
WARNING
! Warns of a potential hazard the reader may be exposed to that could
result in
death or serious injury if
not avoided. This admonition is not used for situations that pose a
risk only to equipment, software, data, or service. (ANSI)
CAUTION
! Warns of a potential hazard the reader may be exposed to that could
result in minor or moderate injury if not avoided. (ANSI, OSHA) This admonition is not
used for situations that pose a risk only to equipment, data, or service, even if such use
appears to be permitted in some of the applicable standards. (OSHA)
ALERT
! Alerts the reader to an action that must be avoided in order to protect
equipment, software, data, or service. (ISO)
ALERT
! Alerts the reader to an action that must be performed in order to prevent
equipment damage, software corruption, data loss, o
r service interruption. (ISO)
FIRE SAFETY
! Informs the reader of fire safety information, reminders, precautions,
or policies, or of the locations of fire
-fighting and fire-safety equipment. (ISO)
SAFETY
! Informs the reader of general safety information, reminders, precautions, or
policies not related to a particular source of hazard or to fire safety. (ISO, ANSI, OSHA)

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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IMPORTANT SAFETY INSTRUCTIONS
General Safety
DANGER! YOU MUST FOLLOW APPROVED SAFETY PROCEDURES.
Performing the following procedures may expose you to hazards. These procedures should be
performed by qualified technicians familiar with the hazards associated with this type of equipment.
These hazards may include shock, energy, and/or burns. To avoid these hazards:
a) The tasks should be performed in the order indicated.
b) Remove watches, rings, and other metal objects.
c) Prior to contacting any uninsulated surface or termination, use a voltmeter to verify that no voltage
or the expected voltage is present. Check for voltage with both AC and DC voltmeters prior to
making contact.
d) Wear eye protection.
e) Use certified and well maintained insulated tools. Use double insulated tools appropriately rated for
the work to be performed.
Voltages
AC Input Voltages
DANGER! This system operates from AC input voltage capable of producing fatal electrical shock.
DC Output and Battery Voltages
DANGER! This system produces DC power and may have a battery source connected to it. Although
the DC voltage is not hazardously high, the rectifiers and/or battery can deliver large amounts of current.
Exercise extreme caution not to inadvertently contact or have any tool inadvertently contact an output
terminal or battery terminal or exposed wire connected to an output terminal or battery terminal.
NEVER allow a metal object, such as a tool, to contact more than one termination or battery terminal at a
time, or to simultaneously contact a termination or battery terminal and a grounded object. Even a
momentary short circuit can cause sparking, explosion, and injury.
Hazardous Voltage
DANGER! HAZARD OF ELECTRICAL SHOCK.
More than one disconnect may be required to de-energize the system before servicing.
Handling Equipment Containing Static Sensitive Components
ALERT! Installation or removal of equipment containing static sensitive components requires careful
handling. Before handling any equipment containing static sensitive components, read and follow the
instructions contained on the Static Warning Page.

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STATIC WARNING
This equipment contains static sensitive components. The warnings listed below must be observed to
prevent damage to these components. Disregarding any of these warnings may result in personal injury
or damage to the equipment.
1. Strictly adhere to the procedures provided in this document.
2. Before touching any equipment containing static sensitive components, discharge all static
electricity from yourself by wearing a wrist strap grounded through a one megohm resistor. Some
wrist straps have a built-in one megohm resistor; no external resistor is necessary. Read and follow
wrist strap manufacturer’s instructions outlining use of a specific wrist strap.
3. Do not touch traces or components on equipment containing static sensitive components. Handle
equipment containing static sensitive components only by the edges that do not have connector
pads.
4. After removing equipment containing static sensitive components, place the equipment only on
static dissipative surfaces such as conductive foam or ESD bag. Do not use ordinary Styrofoam™or
ordinary plastic.
5. Store and ship equipment containing static sensitive components only in static shielding containers.
6. If necessary to repair equipment containing static sensitive components, wear an appropriately
grounded wrist strap, work on a conductive surface, use a grounded soldering iron, and use
grounded test equipment.

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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INTRODUCTION
Overview
The rectifier provides load power, battery float current, and battery recharge current 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 3500 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.
•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 3500 W.
•Constant Power Mode: As load increases above approximately 3500 W (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
DC Output Ratings
NOTE! A current limitation can be set by the User and the output voltage level is set through the
controller.
•Voltage: Nominal -48 volts DC, positive ground.Output voltage is adjustable from -42 to -58 volts DC
via the associated controller.
•Output Power and Current: 3500 W (73 A) @ 208 VAC / 220 VAC / 230 VAC / 240 VAC / 277 VAC
input and -48 VDC output.
•Output Characteristics: Refer to Figure 1for a graph of output voltage vs. output current.
Figure 1: Output Voltage vs. Output Current
0
10
20
30
40
50
60
010 20 30 40 50 60 70 80
Output Voltage (V)
Output Current (A)
Output voltage vs. Output current,
Max. Output Power 3500W

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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•Power Derating Based on Input Voltage:The rectifier power varies with changes in input voltage and
output voltage. It uses an advanced power limitation method. The lower input threshold is 85 VAC. The
rectifier can provide its maximum rated power (3500 W) as long as the input voltage is within the range
of 176 VAC to 305 VAC. Below 176 VAC, and down to 85 VAC, the rectifier will continue to operate
normally but will be in a power derating mode. The relationship between the output power and input
voltage is illustrated in Figure 2.
Figure 2: Power Derating Based on Input Voltage
•Power Derating Based on Temperature:The rectifier delivers full power when operating at an ambient
temperature of +45 °C (+113 °F) or below. Each rectifier continuously monitors the ambient temperature
surrounding the power conversion circuit. If this temperature for any reason (such as a high ambient
temperature) increases above approximately +45 °C (+113 °F), the rectifier will not shut down. Rather,
the rectifier limits its maximum output power to maintain the temperature of the power conversion
circuit within design parameters. Operation between +45 °C (+113 °C) and +75 °C (+167 °F) will result in
output power being decreased. Full power capability is restored when the temperature decreases to
below approximately +45 °C (+113 °F). Refer to Figure 3to view the relationship between the output
power and the ambient temperature.
Other power rating values are as follows (refer to Figure 3):
a) At an ambient temperature of +50 °C (+122 °F), the power delivered by the rectifier is 3200 W.
b) At an ambient temperature of +65 °C (+149 °F), the power delivered by the rectifier is 2700 W.
WARNING! The rectifier is rated for continuous operation at full output power up to +45 °C (+113 °F).
Operation between +45 °C (+113 °F) and +75 °C (+167 °F) will result in output power decrease.
Operation above +75 °C (+167 °F) is considered abnormal and should be used on a temporary1basis
only.
1Temporary Operation at Abnormal Temperature: Temporary operation is defined as a period of
not more than eight consecutive hours per day, and a total of not more than 15 days in a year.
(This refers to a total of 120 hours in any given year, but no more than 15 occurrences in that one-
year period.)
0.0%
20.0%
40.0%
60.0%
80.0%
100.0%
120.0%
050 100 150 200 250 300 350
% of output power
For R48-3500e3 Input voltage (Vac)
Output power vs. Input voltage and
Vo≥ 48V at Temp≤45
℃

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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Figure 3: Power Derating Based on Temperature
•Regulation:
a) Static: Steady state regulation is ±0.6% as controlled within the rectifier for any and all combinations of
load from no load to full load, input voltage, and input frequency at a constant ambient temperature.
With controller, the output voltage shall remain within ±0.5% of the set point over the specified ranges of
input line voltage, output load current and ambient temperature.
b) Dynamic: Response time ≤200 microseconds and overshot ≤5% for load changes at 50% - 25% -
50% and 50% - 75% - 50% at rated output voltage and current.
For any step load change within the range of 10% to 90% of full load within 1 milliseconds, per
Telcordia GR-947-CORE, the maximum voltage transient will not exceed 5% of the initial steady
state voltage within 250±10 microseconds. Recovery to within 1% of the initial steady state voltage
does not exceed 4 milliseconds.
•Filtering:
a) Voice Band Noise: Complies with YD/T-731-2008.
1. Peak-peak voltage is ≤200 mV at 0 MHz - 20 MHz and normal output voltage. (YD/T-731-
2008)
2. Psophometric noise is ≤2 mV typical at 220 VAC input, 53.5 VDC output and 20% to 70% of
rated load for more than one rectifier.
b) Wide Band Noise: Complies with YD/T-731-2008.
1. Wideband noise emission is < 20 mV between 25 Hz - 20 kHz according to ETS 300132-2.
AC Input Ratings
•Voltage: Nominal 208 VAC / 220 VAC / 230 VAC / 240 VAC / 277 VAC, single phase, 3-wire, 50 Hz / 60
Hz, with an operating range of 200 VAC to 305 VAC. Acceptable input frequency range is 45 Hz to 65
Hz.
Permitted Variation: 85 VAC to 305 VAC.
Harmonic Content (THD): Meets EN61000-3-2.
≤5% from 50% to 100% of rated output current at 208 VAC, 220 VAC, 230 VAC, 240 VAC, 277 VAC for
50 Hz, 60 Hz, 53.5 VDC and 25 °C;
≤10% for 30% rated output current at 220 VAC, 50Hz, 53.5 VDC and 25 °C.
0
20
40
60
80
100
120
-40 -20 020 40 60 80 100
% of output power
Temperature (
℃
)
Output power vs. Temperature at 290 Vac ≥ Vin ≥
176Vac and 58V ≥ Vout ≥ 48V

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•Inrush Current: Peak does not exceed 1.5 times of the peak value of the maximum steady-state input
current at full load, 220 VAC input voltage, and for any duration of AC input interrupts. Under the above
conditions, standard AC distribution circuit breakers will not trip.
•Typical Input Data: 50 Hz input.
a) Refer to Table 1.
b) Maximum Input Current: Refer to Table 2.
•Typical Input Data: 60 Hz input.
a) Refer to Table 3.
b) Maximum Input Current: Refer to Table 4.
•Efficiency Curve:Refer to Figure 4.

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Table 1: Typical Input Data, 50 Hz Input
Nominal
Input
Voltage
Percent
of Full
Load
Input
Current
(Amperes)
Input
VA
Input
Watts
Power
Factor Efficiency
Heat
Dissipation
BTU/Hr
208
0
0.378
78.8
9.7
--
--
33.0945
25 4.120 859.8 849.5 0.988 95.03 144.0469
50
8.117
1686.4
1681.3
0.997
96.03
227.7298
75 12.141 2528.9 2526.4 0.999 95.83 359.4366
100
16.357
3391.7
3388.3
0.999
95.28
545.6423
110
18.015
3738.2
3734.5
0.999
95.02
634.5210
120 18.078 3751.7 3747.9 0.999 94.99 640.6339
240
0
0.444
106.8
9.7
--
--
33.0945
25 3.613 868.2 849.9 0.979 95.13 141.2150
50
7.038
1689.6
1681.2
0.995
96.19
218.5388
75
10.538
2521.8
2516.8
0.998
96.14
331.4517
100 14.079 3372.4 3365.6 0.998 95.72 491.4626
110
15.541
3717.8
3710.4
0.998
95.51
568.3963
120 15.670 3748.2 3740.7 0.998 95.43 583.2480
277
0
0.619
169
9.55
--
--
32.583
25
3.2784
903.73
846.81
0.937
95.57
128.26
50 6.1537 1703.15 1674.97 0.983 96.52 199.147
75
9.1213
2530.5
2513.8
0.993
96.42
306.642
100 12.1973 3393.2 3363.1 0.991 96.02 457.72
110
13.4469
3713.3
3705
0.998
95.86
525.05
120
13.7451
3793.3
3784.6
0.998
95.47
582.764
NOTE! System output is initially adjusted to 53.5 volts DC as measured at the system sense point at
50% of full load and nominal input. “Percent of Full Load” refers to percent of 60.3 amperes.
Table 2: Maximum Input Current, 50 Hz Input
Nominal
Input Voltage
Input Voltage
Input Current
(Amperes)
208/240 176 21.0
277
235
15.7
NOTE! At 100% of full load with output adjusted to 58 volts DC as measured at the shelf output
terminals.

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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Table 3: Typical Input Data, 60 Hz Input
Nominal
Input
Voltage
Percent
of Full
Load
Input
Current
(Amperes)
Input
VA
Input
Watts
Power
Factor Efficiency
Heat
Dissipation
BTU/Hr
208
0
0.451
94.0
10.5
--
--
35.8240
25 4.146 865.3 851.4 0.984 94.99 145.5310
50
8.138
1689.9
1684.8
0.997
95.98
231.0780
75 12.181 2532.9 2527.8 0.998 95.86 357.0485
100
16.324
3392.5
3385.7
0.998
95.34
538.2928
110
18.020
3739.0
3731.6
0.998
95.05
630.2088
120 18.034 3754.1 3746.6 0.998 95.00 639.1334
240
0
0.523
125.8
10.1
--
--
34.4592
25 3.640 875.8 848.6 0.969 95.15 140.4200
50
7.037
1689.1
1677.3
0.993
96.27
213.4537
75
10.530
2524.7
2517.1
0.997
96.18
328.0560
100 14.107 3381.0 3370.8 0.997 95.71 493.3720
110
15.578
3728.4
3717.2
0.997
95.47
574.5110
120 15.806 3782.0 3770.6 0.997 95.39 593.0558
277
0
0.619
169
9.55
--
--
32.583
25
3.2784
903.73
846.81
0.937
95.57
128.26
50 6.1537 1703.15 1674.97 0.983 96.52 199.147
75
9.1213
2530.5
2513.8
0.993
96.42
306.642
100 12.1973 3393.2 3363.1 0.991 96.02 457.72
110
13.4469
3713.3
3705
0.998
95.86
525.05
120
13.7451
3793.3
3784.6
0.998
95.47
582.764
NOTE! System output is initially adjusted to 53.5 volts DC as measured at the system sense point at
50% of full load and nominal input. “Percent of Full Load” refers to percent of 60.3 amperes.
Table 4: Maximum Input Current, 60 Hz Input
Nominal
Input Voltage
Input Voltage
Input Current
(Amperes)
208/240 176 21.0
277
235
15.7
NOTE! At 100% of full load with output adjusted to 58 volts DC as measured at the shelf output
terminals.

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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Figure 4: Efficiency Curve (at 240 VAC, 60 Hz)
Environmental Ratings
•Operating Ambient Temperature Range:
a) +45 °C (+113 °F) to +75 °C (+167 °F) with derating output.
b) -40 °C (-40 °F) to +45 °C (+113 °F) with full power performance.
c) Temperature Coefficient: 0.02% per degrees Celsius.
•Storage Ambient Temperature Range: -40 °C (-40 °F) to +75 °C (+167 °F).
•Relative Humidity: This rectifier is capable of operating in an ambient relative humidity range of 0% to
95%, non-condensing.
•Altitude: 2000 m (6560 ft) at full power (above 2000 m, derate 3 °C per 300 m up to 4000 m).
•Surge Protection: Compliance with EN61000-4-5 (4kV Line to Line, 4kV Line to Earth). Capable of
withstanding surges per ANSI/IEEE C 62.41 1999 Category B3 across the input terminals.
NOTE!
This level of protection is a widely used standard for telecommunications power equipment. As
with all such equipment, it is the end user's responsibility to provide an adequately sized Surge
Suppression Device at the commercial power service entrance of the building that reduces all incoming
surges to levels below the classes/categories stated for the equipment.
•Ventilation Requirements: The rectifiers are fan cooled and utilize front to back forced ventilation. A
rectifier must be mounted so ventilating openings are not blocked and temperature of the air entering
the rectifier does not exceed the Operating Ambient Temperature Range stated above.
•Single Rectifier Audible Noise: At 25 °C ≤55dB(A) with fan. Measurement made at 1 m distance in front
of rectifier and at same horizontal line of the middle of rectifier.
•High Voltage Category: II.
•Power Distribution System: TN/TT/IT.
NOTE! The rectifier is recommended to be used in an environment with Pollution of Degree 2 or less.
Pollution Degree 2 applies where there is only non-conductive pollution that might temporarily become
conductive due to occasional condensation (such as the office environment).
84
86
88
90
92
94
96
98
010 20 30 40 50 60 70 80 90 100
Load (% of rated load)
Efficiency Curve
Efficiency (%)

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•EMI/RFI Suppression:
a) Rectifiers operating in an approved rectifier mounting shelf conform to the requirements of FCC
rules Part 15, Class B for radiated and conducted emissions limits.
b) Rectifiers operating in an approved rectifier mounting shelf conform to the requirements of
European Norm, EN55022, Class B for Radiated and Conducted emissions limits.
Compliance Information:
•EMC: ETSI EN 300 386, FCC CFR 47 Part 15 class B, Telcordia GR-1089-CORE.
•EMI Load Range: 5% - 100%.
•Safety: IEC 60950, EN 60950.
•REACH, ROHS:
REACH SVHC
Communication
Name of
SVHC above
0.1% (w/w)
CAS
Number Component
Diboron
trioxide 1303-86-2
Chip
Resistors,
Chip Ceramic
Capacitors
Lead
monoxide 1317-36-8 Chip Resistors
EU RoHS Compliant, Lead Free Soldering
Standard Features
•Type of Power Conversion Circuit: High frequency.
•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 3500 W.
•Constant Power Mode: As load increases above approximately 3500 W (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.
•Input Protection:
a) AC Input Fuses F101, F102: AC 300 V, 30 A, fast acting, ceramic.

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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b) Input Over/Under Voltage Protection: The rectifier will shut down at low or high voltage input; based
on the following voltage levels:
1. Low Voltage Disable Point: 80 V, ±5 V; hysteresis is at least 15 VAC for restart.
2. High Voltage Disable Point: 305 V, ±5 V; hysteresis is at least 10 VAC for restart.
c) Between 85 V and 176 V the output power will be derated linearly based on the input voltage as
follows:
1. At input voltage of 85 V with output >48 V, maximum output power is 1500 W.
2. At input voltage of 176 V and output >48 V, maximum output power is 3500 W.
•Output Protection:
a) Overload / Reverse Current: The rectifier has two parallel 63 A fuse wires in the negative output DC
bus. These fuses are not customer replaceable. The rectifier can be plugged into or pulled out of a
shelf while operating, without damage or opening the fuse.
b) Current Limiting: The rectifier has a current limit function. The current limit point can be set
between the range of 0 A to 73 A, adjustable via the controller. The current limit accuracy is ±2 A
when the output voltage ranges from 42 V to 58 V.
c) Advanced Current Limit Function: The rectifier has an advanced Current Limit Function. When a
short circuit occurs at the rectifier output terminals, the rectifier will keep its output current at a
constant value (value that is configurable via the controller). This function effectively protects the
rectifier and the equipment connected to the rectifier. When the short circuit fault is cleared, the
rectifier will automatically restore back to normal operation.
d) High Voltage Shutdown:
1. Adjustable Control: If rectifier output voltage exceeds an adjustable preset value and the
rectifier is delivering more than 10% of its rated current, the rectifier shuts down. (Adjustable
from 56 VDC to 59 VDC via the controller. The restart hysteresis is 0.5 V ±0.2 V.)
The rectifier then restarts and a HVSD restart timer starts (time value configurable via the
controller, factory default is 5 minutes). If output voltage again exceeds the high voltage
shutdown value before the HVSD restart timer expires, the rectifier shuts down and locks out.
Manual restart is then required (by turning power to the rectifier off or by removing the rectifier,
waiting until the LEDs on the rectifier extinguish, then turning power to the rectifier on or re-
inserting the rectifier). If the rectifier does not experience a high voltage condition before the
HVSD restart timer expires, the restart circuit is reset.
If two or more rectifiers are paralleled, only the rectifier causing the high voltage condition shuts
down.
2. Backup: If rectifier output voltage exceeds 59.5 V ±0.5 V (non-adjustable) and the rectifier is
delivering more than 10% of its rated current, the rectifier shuts down. The rectifier then
restarts and a HVSD restart timer starts (time value configurable via the controller, factory
default is 5 minutes). If output voltage again exceeds the high voltage shutdown value before
the HVSD restart timer expires, the rectifier shuts down and locks out. Manual restart is then
required (by turning power to the rectifier off or by removing the rectifier, waiting until the LEDs
on the rectifier extinguish, then turning power to the rectifier on or re-inserting the rectifier).

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•Over-Temperature Protection: The rectifier provides over temperature protection by derating output
power and recovers automatically.
•Active Load Sharing: The rectifier uses advanced digital active load sharing technology that maintains
balancing to within 3% of rated current.
•Hot Swappable: The rectifier is designed to be plug-and-play. The rectifier can be inserted or removed
from a live DC power system with no damage. When the rectifier is plugged into the system, the system
output voltage will not be affected.
•Cooling: Each rectifier contains a fan for front-to-back force air-cooling.
a) Fan Fault Protection: The rectifier shuts down and its alarm indicator (red) flashes if the fan fails.
Fan failure is detected and reported to controller. The fan is field replaceable.
b) Fan Control:Fan speed is continuously variable. When input voltage is within normal range, the
built-in processor adjusts fan speed according to the rectifier’s internal temperature and output
power. For example, a higher temperature or output power increases the fan speed. This feature
can be disabled via the controller, allowing the fan to run at full speed regardless of temperature.
•Paralleling: Up to 63 rectifiers can be connected in parallel in one system.
•Communication Failure: The rectifier’s protection indicator (yellow) will flash should it experience a
communication failure. The failure information will be reported to the controller and the controller will
process the failure accordingly. During a communication failure, in order to protect the battery, the
rectifier output voltage will automatically be adjusted as follows.
-The rectifier default factory output voltage is 53.5V.
-Once power is applied to the rectifier and the rectifier is recognized by the controller, the output
voltage is updated to the setting programmed into the controller.
-If communications with an SCU+ controller is lost, rectifier output voltage goes to a default value
programmed into the controller (this is a separate programmable parameter from the output voltage
setting).
-If communications with an ACU+ or NCU controller is lost, rectifier output voltage goes to the last
communicated float output voltage setting in the controller (the last communicated float output
voltage setting is stored in the rectifier).
-The rectifier will revert to normal operation once normal communication to the controller is restored.
•Rectifier Output Current Imbalance:
a) When the average current of all rectifier modules is greater than 20% of full rated current, and the
difference between local rectifier current and average current is greater than 16% of full rated
current, the yellow protection indicator will illuminate.
b) When the average current of all rectifier modules is greater than 20% of full rated current, and local
rectifier current is less than 2% of full rated current, then the red fault indicator will illuminate.
•Monitoring Function: The rectifier has a built-in advanced DSP that monitors and controls the operation
of the rectifier. The DSP also communicates with the controller in real time through the CAN bus. Table
5lists the different commands and information exchanged between the rectifier and the controller.

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Table 5: Exchange of Information between Rectifier and Controller
Commands / signals that can be
received by the Rectifier Module
from the Controller.
Information gathered by the
Controller from the Rectifier Module.
•Turn On/Off
•Current Walk-in On/Off
•HVSD (High Voltage Shutdown)
Reset
•Current Limit Adjustment
•Voltage Regulation
•Input Voltage
•Output Voltage
•Output Current
•Current Limit Setting
•Temperature
•Over Voltage Setting
•On/Off Status
•Fault Alarms, such as:
HVSD
Fan Fail
•Protection Alarms, such as:
Input Voltage Protection
Inner DC Bus Voltage Protection
High Temperature Protection
•Thermal Derating
•AC Derating
•AC Fail
•Imbalance Output Current
•Address
•Code
•Date
•Software Version
•
Hardware Version
Mechanical Specifications
•Dimensions:
a) Millimeters: 42.0 (Height) X 84.5 (Width) X 330 (Depth)
b) Inches: 1.7 (Height) X 3.3 (Width) X 13.0 (Depth)
•Weight: 1.7 kg (3.7 lbs)
•Indicators:
a) Power (Green)
b) Protection (Yellow)
c) Alarm (Red)

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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OPERATION
AC Input Protection Device Requirements/Recommendations
Refer to the system documentation supplied with the system the rectifier is installed in.
Local Indicators
Location and Identification: Refer to Figure 5.
Description: There are three (3) indicators located on the rectifier’s front panel. The functions of these
indicators are as shown in Table 6.
NOTE! AC voltage must be present at the rectifier input terminals.
Rectifier High Voltage Shutdown and Lockout Restart
Procedure
1. Turn the power to the rectifier off or remove the rectifier, wait 30 seconds or more (until the LEDs on
the rectifier extinguish), then turn the power to the rectifier on or re-insert the rectifier.
Rectifier Current Limit
When setting total rectifier current limit, the set point to each rectifier is the total set point divided by the
number of rectifiers. For example, if the system contains five rectifiers and the current limit is set to 150 amps
then each rectifier has a current limit set point of 30 amps. If one or more rectifiers are removed or fail it will
take several seconds for the individual set points to the remaining rectifiers to be reset. In the example given, if
one rectifier is removed the current limit set point will drop to 120 amps (30 amps times four remaining
rectifiers) until the controller can send updated set points to the remaining rectifiers. This takes a couple
communication cycles (several seconds) after which each rectifier would have a new set point of 37.5 amps for
a total of 150 amps. The total current limit of the rectifiers should not be set such that the loss of the
redundant rectifiers will cause this temporary set point to drop below the actual maximum expected load. If
batteries are used on the rectifier output, the batteries should support the load until the current limit set points
can be re-established due to loss of a rectifier.
Figure 5: Local Indicator Locations
Protection Indicator (Yellow)
Power Indicator (Green)
Alarm Indicator (Red)
R48-3500e3

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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Table 6: Rectifier Indicators
Indicator Normal State Alarm State Alarm Cause
Power
(Green) On
Off No input voltage.
Internal input fuse open.
Flashing The rectifier is being identified by the
controller.
Protection
(Yellow) Off
On
AC input under/over voltage.
PFC output under/over voltage.
Moderate load sharing imbalance.
Rectifier not inserted into the slot
completely.
Rectifier over-temperature protection.
Rectifiers are operating in an output power
derating mode (rectifiers derate when
rectifier temperature rises above or input
voltage falls below acceptable values).
Rectifier in ECO Standby Mode when ECO
Mode is active in controller.
Flashing
Loss of communication with the controller
(the rectifier can provide power).
Alarm
(Red) Off On
Severe load sharing imbalance.
Rectifier output disabled for any reason,
including overvoltage shutdown and
internal output fuse open.
Rectifier addresses contradictory.
Flashing
Fan not operating (rectifier shuts down).
Installing Rectifiers
Rectifiers can be inserted or removed with power applied (hot swappable).
NOTE! Each rectifier module locks into a module mounting shelf by means of a latch located on the
bottom of the rectifier. The latch and rectifier handle are interactive. Pushing the handle up into the
rectifier’s front panel causes the latch to extend to the locking position; pulling the handle down out from
the rectifier’s front panel causes the latch to retract. See Figure 6 .
CAUTION! Double pole/neutral fusing. All-pole circuit breaker should be provided when used in IT
power system, or if N line cannot be distinguished during field installation.
WARNING! To prevent damage to the latching mechanism, ensure the handle is in the open position
when installing or removing a rectifier. NEVER hold the handle in the closed position when installing a
rectifier into a shelf.

Vertiv |eSure™ Rectifier Module User Manual (UM1R483500e3)|Rev. H
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Procedure
NOTE! Refer to Figure 6 as this procedure is performed.
1. Unpack the rectifier.
2. Place the rectifier into an unoccupied mounting slot without sliding it in completely.
3. Loosen the captive screw on the rectifier’s handle. Pull the handle down out from the rectifier’s front
panel (this will also retract the latch mechanism). See Figure 6.
4. Push the rectifier completely into the shelf.
5. Push the handle up into the rectifier’s front panel. This will lock the rectifier securely to the shelf.
Tighten the captive screw on the handle.
6. Repeat the above steps for each rectifier being installed in the system.
7. After the rectifiers are physically installed in the module mounting shelf(s), they are ready for operation
immediately after power is supplied to them.
8. Certain functions (i.e. rectifier current limit, rectifier addressing) may require adjustment when adding or
replacing a rectifier. Refer to “Rectifier Current Limit” on page 18 and the Power System documentation
for instructions.
Figure 6: Installing a Rectifier
Latch
R48-3500e3
Handle
Open the handle
R48-3500e3
Screw
R48-3500e3