Table 9-2 Specifications of feeders and air switches required Note: When the DC input power distribution to the DC input terminal of the inverter is greater than 5m, the corresponding DC cable needs to be increased. 4) Lightning protection facilities In areas where lightning strikes frequently occur, good multi-level lightning protection system shall be equipped at the incoming line of municipal power and the machine room to ensure the safe operation of the equipment. 9.5 Brief description of host installation 1) Connect the frame ground wire to the machine ground wire (PE).
2) An appropriate air switch shall be connected in series between the DC input end of the inverter and the DC power supply (see table 4-1 for specific configuration), and the air switch shall be disconnected. Connect the DC input of the inverter and the DC power supply, and then close the air switch. 3) Connect the 220VAC output to each load with the power line, pay attention to the grounding mark and connect the ground wire. 4) The inverter is provided with an output wiring board and a universal output socket. The socket can only provide a maximum power supply of 10A.
If there are many load equipment and the total power meets the output requirements of the inverter, please connect it to the wiring board to meet the load wiring requirements. 9.6 Electrical connection 9.6.1 Matters needing attention: 1.Requirements for wiring 1) Overhead wiring shall be adopted when the equipment requires upper wiring. If lower wiring is required, the cable shall go through concealed trench. The principle of electrical connection is safe, reliable and standardized. 2) No joint is allowed in the middle of the cable. 3) When the cable adopts the same color, it shall be black, and the cable identification shall be done to avoid confusion.
4) The terminals, contacts and other unnecessary exposed parts of the line shall be fully insulated. 17 Power Maximum DC input Current DC fuse or air switch capacity (anegative) DC cable size mm2 ( one positive and one negative) 6KVA 80A 100-125A 25-35 9KVA 150A 200A 35 12KVA 200A 250A 50 15KVA 250A 300A 70