Vertiv
™
NetSure
™
-48 VDC Power System
System Application Guide
Spec. No: 582140001
Proprietary and Confidential © 2022 Vertiv Group Corp.
SAG582140001
Model No: 801
NLDB
, 801
NLEB
, 801
NL
-
B
Page 76
Revision T, September 28, 2022
4.
RECTIFIER MODULE (MODEL R48-5800L, SPEC. NO. 1R485800L)
4.1
DC Output Ratings
4.1.1
Voltage: Nominal -48 volts DC, Positive Ground.
(A)
Without Battery Charge Temperature Compensation: Float voltage is adjustable from 47.00 to 58.00 volts
DC. Test/equalize voltage is adjustable from 45.00 to 58.00 volts DC. Adjustment is made via the MCA.
Both float and test/equalize voltages are factory set at 52.00 volts, unless otherwise specified. The output
voltage temperature coefficient (1/°C) does not exceed 0.01% per degree centigrade from 0°C to +40°C.
(B)
With Battery Charge Digital Temperature Compensation Probe: With an optional battery charge digital
temperature compensation probe installed, the MCA automatically increases or decreases the output
voltage as battery ambient temperature decreases or increases, respectively. Float voltage is factory set
at approximately 54.48 volts at 25
°
C battery ambient. The float and test/equalize voltage range is the
same as without battery charge temperature compensation. Using battery and equipment manufacturers’
recommendations, the user selects the following temperature compensation curve parameters via the
MCA. Refer to "Typical Float Charge Thermal Characteristics Using Optional Battery Charge Digital
Temperature Compensation Probe" in
Battery Charge Temperature Compensation Probe for Digital
Compensation
under
ACCESSORY DESCRIPTIONS
.
(1)
The temperature compensation slope in volts/
°
C. Adjustable from zero to 200 millivolts/
°
C.
Adjustment is made via the MCA. Factory set at 0V/
°
C (DIGITAL TC OFF).
(2)
The maximum voltage limit in volts DC. Adjustable from float up to 58.5 volts DC, but automatically
limited to one volt below the High Voltage Shutdown setting. Adjustment is made via the MCA.
Factory set at 56.5 volts DC.
(3)
The minimum voltage limit in volts DC. Adjustable from float down to 44 volts DC. Adjustment is
made via the MCA. Factory set at 50.0 volts DC.
4.1.2
Current: One hundred amperes (100A) per Rectifier Module.
4.1.3
Output Power: 5800W @ Vout > 48VDC.
4.1.4
Output Characteristics: The relationship between output voltage and current is summarized in the following
table and depicted graphically in the following illustration.
Output Power
Output
Current
Output
Voltage
5800 W
100.0 A
58 VDC
5800 W
121.0 A
48 VDC
0
10
20
30
40
50
60
70
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160
O
ut
put
v
ol
ta
ge
(V
)
Output current (A)
Output voltage vs. output current,
max. output power 5800 W
