Function Descriptions; Rectifier, Solar Converter, And Converter Control; System Components Monitoring And System Alarms Generation; Operating Data Acquisition And Data Logs - Vertiv Netsure User Manual

NetSure ™ Control Unit (NCU)
User Manual, UM1M830BNA

Function Descriptions

RECTIFIER, SOLAR CONVERTER, AND CONVERTER CONTROL

The NCU controls rectifiers, solar converters, and converters
automatically.
NOTE: Solar Mode has to be enabled for NCU control of solar
converters (see "Enabling Solar Mode" on page 25).
SYSTEM COMPONENTS MONITORING AND SYSTEM ALARMS
GENERATION
The NCU monitors the components comprising the system (such
as the rectifiers, solar converters, converters, and supervisory
modules) and generates alarms if a fault condition occurs. The
NCU also maintains an alarm history log.
The available system alarms are programmed with an Alarm
Severity Level. Each Alarm Severity Level has different
visual/audible alarm attributes. Available Alarm Severity Levels
and their attributes are listed in
Table 1. Alarm Severity Levels
Alarm
Red
Severity
LED
Levels
Critical
ON
Alarm (CR)
Major
ON
Alarm (MJ)
Minor
OFF
Alarm (MN)
No
OFF
Alarm (NA)

Alarm Status Setting: Indicates if the alarm is active or
not active, and the severity level if active. The available
alarm status settings are as follows.
Critical Alarm: The fault endangers the power
o
systems continued function.
Major Alarm: The fault reduces the power systems
o
functionality.
Minor Alarm: Special operating condition.
o
No Alarm: The alarm is disabled and no alarm is
o
given.

The alarm indicator turns OFF if the fault(s) that triggered
the alarm clears.
Spec. No: 1M830BNA, 1M830DNA
Model No: M830B, M830D
Table 1.
Audible
Yellow
Alarm
LED
Buzzer
-- ON
-- ON
ON OFF
OFF OFF

The audible alarm can be silenced by pressing any key on
the NCU local interface pad. The audible alarm is also
silenced if the fault(s) that triggered the alarm clears.
 An audible alarm cutoff feature can be programmed that
silences the audible alarm after a preset programmable
time period. The audible alarm can also be disabled.
The available system alarms can also be mapped to alarm relays
(located on controller interface boards) that can be wired to
external alarm circuits.

OPERATING DATA ACQUISITION AND DATA LOGS

The NCU acquires and analyses real time data from the system's
components such as the rectifiers, converters, and supervisory
modules.
The NCU uses this data to process alarms and also records data in
logs. The logs are viewed using the Web Interface and consists of
the following. Logs can be saved in the .html (Web page) or .txt
(text) format.

Alarm History Log: Records 4000 latest alarms. The Web
Interface displays the latest 500 items.

Battery Test Log: Up to ten (10) battery discharge tests
can be recorded.

Event Log: Records 500 latest events.

Data History Log: Records 60000 latest history data. The
Web Interface displays the latest 500 items, and you can
upload a file with up to the latest 6,000 items in a single
date range. Use multiple date ranges to upload more
than 6,000 items.
 System Log: Records 3000 items in run log. The Web
Interface displays the latest 500 items.
NOTE: For all logs except the Battery Test Log, once maximum
number of log entries is reached, new entries overwrite the
oldest entries.

BATTERY MANAGEMENT

The NCU provides the following battery management functions.

Battery Charge Temperature Compensation

Battery Equalize Charge

Battery Charge Current Limit
 High and Low Battery Temperature Alarms
 Battery Thermal Runaway Management (BTRM) Feature
(Reduces Voltage during a High Battery Temperature
Condition)
[2]
Code: UM1M830BNA
Revision M, May 12, 2017