Version: 2020-09-04
167
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.)
Current Sensor
Each BACS module already provides its own charge / discharge detection.
The detection by the BACS modules arises from the need for batteries to generally have a slight discharge curve and lose their charge
over time.
However, this charge / discharge detection is realized by voltage measurements of the cell. If the voltage drops below a rated voltage,
BACS assumes a discharge is in progress. What the BACS module does not measure is the current flowing through the individual
strings during a battery discharge cycle.
In addition to the charge / discharge detection, the current sensor can also be used to check whether the currents are divided equally
between the parallel battery strings as well as the average quality and stability of the current.
Installing the current sensor
If you want to use a BACS Current Sensor, enable the BACS CS
Current Sensor Connected:
By default, the BACS Web Manager searches for one current sensor
per battery string - the number of BACS strings will reflect the number
of sensors that need to be found. At BACS monitor, the result will
displayed below the according string.
Premium feature: Only One Current Sensor for All Strings
Usually each battery string get its own current sensor to get information about real current flow on all strings. In some cases it is
desirable by customers to use only one current sensor for a general charge / discharge detection. By doing so, BACS need to know that
only one current sensor is installed:
Enable "Only One Current Sensor for All Strings" and press apply to restart BACS.
After restarting BACS, only one sensor will be automatically displayed. If the current senser is installed on a string, the ampere multiplier
value will get approximate overall current value.
Premium feature: Ampere Multiplier – how it works
The ampere multiplier multiplies the measured current by a theoretical factor in order to draw conclusions about the entire system. The
multiplier value to be entered depends two factors:
1. There are several strings in the BACS system - the number of strings determines the multiplier.
2. For various reasons only one current sensor is available
The multiplier can be used this way:
Main string: The current sensor mearusres mail current value = 1
Single string: The current sensor measures the partial current oft he string value = Number of strings
Since the measurements are not very exact In the end, this solution serves only the more accurate charge / discharge detection. It is not
designed to determine more information than an exact charge/discharge detection as well as basic information about estimated current
flow.
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