5) The DC shall be led out from the terminal close to the DC input as far as possible to reduce the voltage drop of the bus. Considering the output characteristics, the length generally shall not exceed 5m. If it is necessary, it can also be extended appropriately, but too long will cause DC undervoltage. During load switching, DC input undervoltage protection will be caused. At this time, it is necessary to increase the wire diameter and reduce the wire voltage drop. 6) All joints shall ensure tight contact and good continuity.
7) If the DC bus is long and other DC input equipment is connected at the user end of the bus, 10000-20000 UF shall be connected in parallel at the common point, and the withstand voltage shall be (1.5-2)Ч(DC rated input) VDC capacitor to eliminate cross interference noise. 9.6.3 Grounding The grounding system shall be kept in good condition. The protective grounding device of the inverter and the grounding screw of the metal shell shall have reliable electrical connection, and the connection resistance shall be less than 0.1 Ω. 9.7 System inspection 1) Inspection of AC output line:
whether the line chromatography for AC output line is standardized, whether the wire diameter of AC output cable is appropriate, whether the connection of live wire (L), zero wire (n) and ground wire (GND) is correct, and whether the connection of AC output line is firm. 2) Ground wire inspection: whether the ground wire of the inverter is connected to the ground wire row of the machine room and whether the ground wire connection is reliable. 3) If there is bypass input, please check whether the wiring is reliable, and the voltage difference between zero line and ground is less than 5vac.
4) If the inverter is equipped with remote monitoring equipment, check whether the connection of relevant RS485 serial port and dry contact is correct. 5) Check whether the wiring is neat and whether the cable binding meets the process specification. 6) Check whether the installation and wiring are conducive to the future transformation, expansion and maintenance of the system. 9.8 Connected load After the inverter starts and enters stable operation, turn on the power switch of the load equipment, start the high-power equipment first, and then start the low-power equipment. Some 19