3. Assembling the ProductET003222373 English 4/2018. Rev 0.0 293.9.3 Busbar InstallationConnect the power busbars between modulesVerify with a voltmeter that no power is present on thesystem. Use lock out/tag out procedures to secure theUPS 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 prevent the terminals from contacting anything except theirintended 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 terminalis on the front of each module and switchgear. Exercise extreme caution to prevent theterminals and/or wires with opposite polarity from contacting with each other. It is recommended not to touch the battery positive(+) or negative(-) terminal for thebatteries with rack frame. There is no evidence of dielectric breakdown because ofelectrical isolation between the battery positive (+) or negative (-) terminals and rackframe. However, it is recommended not to touch them for safety because It is possibleto touch between battery positive (+) and negative (-) through the rack frame.NOTICE Connect the power busbar with an M8 screw for battery module terminals When tightening the screws, make sure they are at a straight angle from thebattery module terminals to avoid damage to the nuts inside. First, assemble the screws using a Phillips-head tip screwdriver using fastening torqueof less than 5.1 Nm (45 in lbs). Then, use an insulated torque wrench extension with a 13 mm socket. Use fasteningtorque of 8.16–11.94 Nm (72–105 in lbs).NOTICE Connect the power bus-bar with an M12 screw for switchgear terminals When tightening the screws, make sure they are at a straight angle from theswitchgear terminals to avoid damage to the nuts inside. The fastening torque should be 30 Nm (265 in lbs) Use an insulated torque wrench extension with a 19 mm socket.Important The power terminals, such as ―B+,‖ ―B-,‖ ―P+,‖ and ―P-,‖ of the module and Switchgearare 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 powerbusbar and reattach the cover immediately after connecting the power busbars.
