Version: 2020-09-04
189
Copyright of the European Union is effective (Copyright EU) (c) 2019 GENEREX Systems GmbH, Hamburg, Germany, All rights reserved
TEL +49(40)22692910 - EMAIL generex@generex.de - WEB www.generex.de (This and all other product datasheets are available for download.)
BACS Functions
For this configuration step, navigate to the following menu:
Each BACS Webmanager offers basic functions that can be switched on or off remotely via the web interface.
BACS Buzzer
This internal alarm provides a clear audible warning signal as soon as there is a problem with your BACS
system or the connected sensors occurs or in the case of a so-called General Alarm.
As a default, the buzzer will be triggered in case of the event „BACS General Alarm “.
BACS Relay
Parallel to the alarm buzzer, BACS provide an internal relay:
With this relay external monitoring systems can be informed that something went wrong. The
internal BACS alarm relay is linked to a general alarm and cannot be configured:
The relay is a pre-defined normally closed contact, which automatically picks up about 15-20
seconds after system startup and is only reopened in case of a system fault:
1. A BACS General Alarm is in progress
2. The BACS Webmanager or BACS Bus Converter is depowered.
Master alarm will start, if …
- Voltage alarm high/low,
- Temperature alarm high/low
- Impedance alarm high/low
- Communication lost to one or more modules or a system alarm is in progress
- Thermal Runaway alarm
- Equalizing / Balancing Error alarm
- String voltage alarm
Note:
If you manually open the relay, it remains open until one of the following conditions is met:
- The device restarts (by rebooting via software button or in case of a cold boot).
- An active BACS-alarm falls back to normal state (voltage measuremnts reach alarm levels and drops below).
- It will be closed via BACS relais functions menu.
BACS alarm thresholds
In principle, there are two points during usage, that may heavily damage the batteries of a UPS system:
Overvoltaged batteries
The overvoltage occurs if a UPS initiates a boost charging cycle to restore emergency power time as fast as possible after a discharge.
As an example, the charging process will be done with a boost charge or operates with predefined charging voltage.
In both cases, the reference charging point is the slowest loading battery to rule the entire charging process.
As result, normal or fast charging batteries are consequently overcharged, leading into average temperature issues and as a long-term
consequence, overcharging the cells in the battery are damaged through the dehydration process coming with abnormal temperature
usage. Overcharging will damage the battery, but this is not enough:
As a consequence of an overcharge, a battery will heat - this may lead into a dangerous battery overheating and fire issue. Conversely,
a battery damaged by overvoltage can subsequently not meet the requirements set, which leads to different behavioral characteristics:
- Extended loading time
- Permanently performance decrease
- Temperature increasing with each charge/discharge cycle
- Sporadically dropping below the discharge end voltage
- Lapsing service time
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