SUNSYS HES L - 551697A - SOCOMEC
23
EN
The deepest level of logic is the one managed directly by module. Each converter has its own fan and set the rotation
speed according to the level of load and certain components temperature.
On top of that there is a logic controlling the temperature and the humidity inside the cabinet, in order to avoid damages to
its electronic components.
This logic is called the environmental logic and it controls the 3 small heaters on the front side of the machine and the two
extracting fans on the back. According to the cabinet temperature, the ambient temperature and the humidity measures,
this logics will apply the minimum level of heating and ventilation to protect the machine from any potential damage due to
environmental conditions.
This logic is running all the time and is divided into 3 main sequences. The first one takes part before the electronic is
energized. In this phase a
thermostat and a hygrostat are activating the heaters
and prevent from the electronic power
supply until
the temperature r2°C and the humidity goes below 75%
.
Then, the software reactivates the heater and the fans in order to fully dry the machine.
This drying is needed to avoid
any condensation
that might result from storing conditions or temperature and humidity variation.
This sequence lasts
for at least 3 hours and is operated every time the machine is completely de-energized and restarts
. Please note
that if the system restarts within 20 minutes after the UPS stopped, the 3h drying will be skipped. If it restarts between
20 minutes and 2 hours it will be skipped if the environmental conditions are within certain criteria (for more detail please
contact Socomec). After the 3 initial hours, if the cabinet temperature is higher than +5°C, the ambient temperature lower
than +48°C and cabinet humidity lower than 90% the machine goes in ready mode, the DC source can be connected and
the system starts. If one of these condition is not met, the system will continue the drying logic until they are all met.
Once the drying has been completed the machine is safe and we enter the working phase of the operation.
Finally we can consider an additional state consisting in
critical alarm state that will stop the machine
and that is
activated at any time in the process if one of the following conditions is reached:
- the cabinet temperature r53°C
- the cabinet temperature goes below -1°C
- the ambient temperature goes below -22°C
- the ambient temperature goes over 51°C
-
the cabinet humidity reaches 93%. (note if ambient humidity goes above 95% it generates a warning but it does not
stop the machine)
The batteries have a more tightly controlled environment which affords better battery performance and longer life.
Component of the B-Cab environment control include an autonomously controlled HVAC system using an air to liquid
cooling loop (not shown in the above figure)
Figure 13. Environmental logic diagram
