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 119
the rectifier does not experience a power factor corrector failure condition within the 5 minute time period, the
restart circuit is reset.
3.4.8
Thermal Shutdown: If the internal temperature of a rectifier exceeds the over temperature protection threshold,
the rectifier shuts down. After approximately 3 minutes, the rectifier automatically restarts. If the internal
temperature of the rectifier again exceeds the over temperature protection threshold within 30 minutes, the
rectifier shuts down and locks out. Manual restart is then required. If the internal temperature of the rectifier does
not exceed the over temperature protection threshold within the 30 minute time period, the thermal shutdown
lockout circuit is reset.
3.4.9
Paralleling: This system may be connected in parallel with any rectifier of the same polarity and adjusted to the
same output voltage.
3.4.10
Load Sharing: The controller load sharing feature automatically balances the load to within ±3% of the rectifiers
rated output currents. If the controller's load sharing feature is disabled for any reason, pre-programmed slope
control in each rectifier balances the load to within ±10% of their rated output currents. The controller will balance
a system of up to 80 rectifiers within 5 minutes. Load sharing is enabled when the load is between 10% and 95%
capacity. In Power Share applications, load sharing is enabled once the legacy plant is 100% loaded.
3.4.11
Output Current Walk-In: Output current gradually increases after the system is switched on, or AC service is
supplied or restored as indicated below. Elapsed time is constant at 10.2 seconds.
3.4.12
Cooling: Each rectifier contains multiple fans for forced convection cooling. If one fan in a rectifier fails, the
rectifier continues to operate but at reduced output current (maximum output current is reduced to 50% of rated
output current). If two or more fans fail, the rectifier's power conversion circuitry inhibits.
3.4.13
Local Controls: Refer to the "Operating Procedures" chapter in the Power System User Instructions for a complete
description.
(A)
Standby/Operate Switch
3.4.14
Local Status and Alarm Indicators: Refer to the "Operating Procedures" chapter in the Power System User
Instructions for a complete description.
(A)
AC/Identification (Green)
(B)
Rectifier Fail / Minor (Red / Yellow) (208V Rectifier)
(C)
Protection Alarm (Yellow) (480V Rectifier)
(D)
Fail Alarm (Red) (480V Rectifier)
(E)
A 10-segment Green LED Indicator Bar is located on the front panel to represent output current, each segment
represents 20A (blinks when in overload condition).
4.
MCA (IF FURNISHED)
4.1
Standard Features
4.1.1
MCA Interface: You interface with the MCA locally via the MCA Control Panel located on the outside of the primary
Power/Distribution Bay's front door.
You can also interface with the MCA via the LMS, if furnished.
Note:
Option switches are provided to lockout changing adjustment/configuration/calibration settings via the
MCA control panel and/or via the LMS.
4.1.2
MCA Local Display: Provides digital metering of system load voltage and current, individual rectifier output, and
individual load shunts. Also displays system alarm messages and adjustment information, as detailed in Paragraph
4.1.12 (
MCA Display
).
4.1.3
MCA Meter Accuracy: ±0.01 V, ±0.005% / °C
4.1.4
MCA Remote Sense Maximum Voltage Drop Compensation: The maximum voltage drop that the Remote Sense
can compensate is 400mV for 48V systems and 200mV for 24V systems.
4.1.5
MCA Universal Adjustment Circuit: Provides single point control of float output voltage, test/equalize output
voltage, high voltage shutdown, and current limit adjustments.
Note:
If the MCA should fail, the rectifiers remember the float and high voltage shutdown settings last delivered
by the MCA. The current limit setting of each rectifier goes to 100% of rated full load.
Provides adjustments for all MCA alarm and control circuits. Adjustment ranges and factory settings as follows.
All adjustments can be performed locally via the MCA Control Panel, and most can be performed remotely via the
LMS (if furnished).