BLVD
The system has battery low voltage disconnection (BLVD) optional function. BLVD means when the mains fail
and batteries supply power, the controller cuts the load off when the battery voltage drops down to below 43.2V
to prevent over-discharge. The BLVD voltage is settable. Refer to NCU User Manual
for setting method.
The factory setting is enabling BLVD, which means that if power outage lasts for a long time or the power system
fails, there might be BLVD. Users should classify the loads and connect the priority loads to BLVD routes. For
vital loads, users can disable BLVD of these loads to insure reliability of the power supply.
The method of disabling BLVD is:
Set “SMDU LVD”-“LVD1 Enable” item of the controller to “N”. Refer to NCU User Manual for setting method.
Notice
The advantage of enabling BLVD is protecting the batteries from over-discharge when the battery voltage is low. The
disadvantage of enabling BLVD is that when the battery voltage drops down to a certain value, all the loads (including
non-priority loads and priority loads) will be cut off due to battery disconnection.
The advantage of software disabling BLVD is prolonging the power supply of priority loads. The disadvantage is
that software disabling cannot prevent unwanted power failure due to misoperation or power system failure.
Others
I. Sharp object
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