User manual

IV. ESD
Note
The static electricity generated by the human body will damage the static sensitive elements on PCBs, such as large-scale
ICs. Before touching any plug-in board, PCB or IC chip, ESD wrist strap must be worn to prevent body static from
damaging the sensitive components. The other end of the ESD wrist strap must be well earthed.
V. Short circuit
Danger
Danger
During operation, never short the positive and negative poles of the DC distribution unit of the power supply system or the
non-grounding pole and the earth. The power supply system is a constant-voltage DC power device, short circuit will result
in equipment burning and endanger human safety.
Check the polarity of the cable and connection terminal when performing DC live operations.
As the operation space in the DC distribution unit is very tight, please carefully select the operation space.
Never wear a watch, bracelet, bangle, ring, or other conductive objects during operation.
Use insulated tools.
In live operation, keep the arm, wrist and hand tense, so that when the tool in operation slips, the movement of
the human body and tool is reduced to a minimum.
BLVD
The power supply system has battery low voltage disconnection (BLVD) function. BLVD means when battery
voltage drops down to 43.2V, the power supply system cuts the load off to prevent over-discharge.
BLVD is enabled before delivery, which means that if power outage lasts for a long time or the power supply
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 to ensure reliability of the power supply.
The method of disabling BLVD is:
Set ‘BLVD disabled’ parameter through the monitoring module main menu Settings (password: 1) LVD
BLVD.
Warning
Notice
Note
The advantage of BLVD is protecting the batteries from over-discharge. The disadvantage of 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 disabling BLVD is prolonging the power supply of priority loads. The disadvantage is that disabling
cannot prevent unwanted power failure due to misoperation or power supply system failure.