Vertiv
™
NetSure
™
802 and Vertiv
™
NetSure
™
8200 -48 VDC Power System
System Application Guide
Spec. No: 582140000
SAG582140000
Model Nos: 802
NLDB
, 802
NLEB
, 802
NL
-
B
,
Proprietary and Confidential © 2022 Vertiv Group Corp.
Revision BH, September 28, 2022
8200
NLDB
, 8200
NLEB
and 8200
NL
-
B
Page 117
3.4.3
Test/Equalize Charging Output Mode: This mode of operation is used if higher output voltage is required for
equalizing the charge on all battery cells of a conventional flooded cell battery, or for recharging the battery
following a commercial power failure.
If the installation site does not require system equalize mode of operation, the equalize feature can be used as a
test feature. System equalize voltage can be adjusted to a test voltage value. Placing the system into the
test/equalize mode causes system output voltage to increase or decrease to this test voltage value.
Note:
If the system is used with a battery charge temperature compensation probe, typical equalize mode of
operation is not used.
3.4.4
Input Protection: Lists 1/List 101 and List 11/List 111 provide connections for up to ten AC input branch circuits, one
per rectifier mounting position. Customer to provide AC input branch circuit protection.
Lists 2/List 102 and List 12/List 112 must be used with a PDSC (AC Input 'Power Distribution Service Cabinet'). This
cabinet provides connections for one or two AC input branch circuits. A 30 ampere AC input circuit breaker with
an interrupting capacity of 22kA (List 30) or 65kA (List 31) amperes at 480 volts AC is provided for each rectifier
mounting position.
(A)
Low AC Input Voltage Inhibit: If AC input voltage decreases to a preset non-adjustable value, the rectifier's
power conversion circuitry inhibits, disabling system output. When AC input voltage increases to another
preset non-adjustable value, the system automatically restarts.
(1)
480VAC Input (R48-12000e): Designed to inhibit at approximately 255 volts AC, and to restart at
approximately 260 volts AC.
(2)
208VAC Input (R48-12000Le): Designed to inhibit at approximately 138 volts AC, and to restart at
approximately 157 volts AC. (Note: In the range of 140 to 180V, the output is de-rated to 50%.)
(B)
High AC Input Voltage Inhibit: If AC input voltage increases to a preset non-adjustable value, the rectifier's
power conversion circuitry inhibits, disabling system output. When AC input voltage decreases to another
preset non-adjustable value, the system automatically restarts.
(1)
480VAC Input: Designed to inhibit at approximately 550 volts AC, and to restart at approximately 535
volts AC.
(2)
208VAC Input: Designed to inhibit at approximately 264 volts AC, and to restart at approximately 250
volts AC.
(C)
Phase Loss: If any of the three phases of the AC input voltage decreases below the lower limit or increases
above the upper limit in Paragraph 3.2.1, the rectifier's power conversion circuitry inhibits, disabling system
output. When the phase is restored, the system automatically restarts.
3.4.5
Output Protection
(A)
Current Limiting: The maximum current delivered by the system can be programmed from 10% to 110% of total
system capacity. The controller automatically adjusts the current limit circuit on each rectifier so that this
value is not exceeded. If a rectifier fails, the controller automatically resets each remaining rectifier's current
limit point to maintain this value. The controller also insures that the current limit circuit on any rectifier is not
set above 110% of its capacity. The default current limit setting is the sum of each installed rectifier's output
rating. If an additional rectifier is added to the system, the system current limit is automatically increased by
the rating of the new rectifier and the new current limit value is displayed.
The current limiting point can be adjusted without removing a rectifier. One adjustment changes the setting
of all rectifiers.
The current limit is factory set at 100% of rated full load, unless otherwise specified.
(B)
Output Fusing: Output fusing is provided in each rectifier. If a fuse opens, local and remote rectifier Fail
Alarms activate. This fusing is not customer replaceable.
(C)
Thermal Current Limiting: Each rectifier continuously monitors the ambient temperature surrounding the
power conversion unit circuit. If this temperature for any reason (such as a high ambient office temperature)
increases above approxi40°C (+104°F), the rectifier will not shut down. Rather, the rectifier will limit
its maximum output current to maintain the temperature of the power conversion circuit within design
parameters. Full current capability is restored when the temperature decreases to below approxi40°C
(+104°F). The following figure illustrates typical operating parameters.
Note:
If the current limit setting is greater than the maximum allowable output current for the existing room
ambient temperature, the current limit setting will automatically be reduced. Refer to the following
figure. Local and external indications will be given.