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5.1.3
Alarms
The MasterShunt 500 features six different alarm parameters which can be configured to custom chosen values. If the alarm
conditions are met, i.e. the chosen value has been reached, the alarm function can trigger an action. For instance the alarm
"Battery low" can trigger a generator to start and recharge the battery. The following table lists the available alarms.
Alarm
Description
Voltage high
When the battery voltage rises above the high voltage level (15V default value), the alarm function will be
raised with the set High delay time.
Very low
If the battery voltage drops below a preset value (10V default) this alarm is raised (after the set Low delay
voltage
time).
Very low
This function will be triggered when the State Of Charge (SOC) drops below a preset value( 35% default).
battery
Fuse alarm
This alarm is raised when the internal MasterShunt 500 fuse is blown.
Low voltage
To prevent the battery from becoming discharged too deeply, a value above Voltage low can be set (11V
default).
Low battery
To prevent the battery from draining, a SOC value above Battery low can be set (40% default).
Table 3: MasterShunt 500 alarm items
5.1.4
Monitoring
The MasterShunt 500 continuously monitors the battery's State of Charge (SOC). If the SOC drops below a pre-set value or
the battery voltage is either too high or too low, the alarm function is activated. For alarm settings, automation and functions
refer to sections 5.1.1, 5.1.2 and 5.1.3. The Monitoring menu is read-only.
Notes:
- At first start up and after a power reset, the MasterShunt 500 shows "State of Charge --- %".
SOC will show a valid number when the battery bank is charged to full conditions.
- SOC and Remaining are not shown in the "I + U only"-mode.
Item
Description
State of Charge %
The actual amount of energy left in the battery, related to the selected battery capacity.
The time remaining before the battery will be empty. Maximum value: 480 hrs (20 days). Under 24 hrs
Remaining
it shows hh:mm:ss, above that dd:hh. During charging it shows "--:--:--".
hh:mm:ss
This value depends on the current drawn.
Cap. Consumed
Capacity consumed shows how many Amp-hours (Ah) have been consumed from the battery bank.
Battery V
The measured voltage at the MasterShunt 500.
Battery A
The measured current through the poles of the MasterShunt 500. Charging appears as positive
current, discharging as negative current.
Battery °C
The temperature measured by the temperature sensor, connected to MasterShunt 500. If a charger
has been connected to the MasterShunt 500, this temperature sensor will be relevant for charge
voltage correction!
Time
If you have set the [Time], this screen shows hh:mm:ss. Refer to section 5.1.1 for settings.
Date
If you have set the [Date], this screen shows dd:mm:yyyy. Refer to section 5.1.1 for settings.
5.1.5
History
To know the history of your battery bank can be very useful. It will help you to check if the battery capacity suits the application
and when the battery needs to be replaced. The memory back up system of the MasterShunt 500 saves this data even if the
battery was completely discharged or disconnected. The following parameters are only shown in MasterAdjust.
Message
Description
Standard history
Days running
The total number of days since the MasterShunt 500 was powered.
Last time 100%
The number of days since the battery bank was charged up to 100% for the last time. To prevent
damage the batteries must be charged to the full 100% regularly.
Battery usage
The total number of charging cycles of the battery bank.
MasterShunt 500 – User and Installation manual
15
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