Samsung U6A4, Installation Manual

Page: 62 / 128

3
.
Installing the Product
44 English 8/2020. Rev 0.3
3.10.5 Busbar Installation
Connect the power busbars between modules
Verify with a voltmeter that no power is present on the system.
Use lock out/tag out procedures to secure the UPS and batteries.
CAUTION

Please follow the instructions to protect the module BMS against damage.

Important: DO NOT deviate from the sequence of steps below.

The system’s voltage will increase proportionally as battery modules are connected. Exercise
extreme caution to prevent the terminals from contacting anything except their intended
mounting points.

Terminals and their connected wires have either positive or negative polarity (Positive: B+, P+;
Negative: B-, P-). The polarity of a terminal or a wire connected to the terminal is on the front
of each module and SMU. Exercise extreme caution to prevent the terminals and/or wires with
opposite polarity from contacting with each other.

It is recommended not to touch the battery po) or negative(-) terminal for the batteries
with rack frame. There is no evidence of dielectric breakdown because of electrical isolation
between the battery positive (+) or negative (-) terminals and rack frame. However, it is
recommended not to touch them for safety because It is possible to touch between battery
positive (+) and negative (-) through the rack frame.
NOTICE

Connect the power busbar with an M8 screw for battery module terminals

The fastening torque should be 12.2–14.0 Nm (124–142 kgf/cm).

Use an insulated torque wrench extension with a 13 mm socket.

After torqueing, torque mark the screws using a colored marker or a torque seal.
NOTICE

Connect the power bus-bar with an M12 screw for SMU terminals

The fastening torque should be 30 Nm/300 kgf∙cm.

Use an insulated torque wrench extension with a 19 mm socket.

After torqueing, torque mark the screws using a colored marker or a torque seal.
Important

The power terminals, such as “B+,” “B-,” “P+,” and “P-,” of the module and SMU are covered
with the power terminal cover to guard against a short circuit.

At each step in this process, you must remove the cover prior to connecting a power busbar
and reattach the cover immediately after connecting the power busbars.