User Manual of EM760 High-Performance Inverter 3.2.3 Standard wiring diagram of main circuit The standard wiring diagram of the main circuit of the EM760 series inverter is shown below . ● EM760-0R7G/1R5P-3B~ EM760-075G/090P-3B EM760-030G/037P-3~ EM760C-560G/630P-3 Fig. 3-8 Standard wiring of main circuit 3.2.4 Input side wiring of main circuit 3.2.4.1 Installation of circuit breaker Install the air circuit breaker (MCCB) corresponding to the inverter between the power supply and input terminal. ● The MCCB capacity should be 1.5-2 times the rated current ofthe inverter.
● The time characteristics of the MCCB must meet the requirements for overheat protection (150% rated current/1 minute) of the inverter. ● When the MCCB is used with multiple inverters or other devices, connect the protection output relay contact of the inverter in series to the power contactor coil, as shown below, to disconnect the power supply according to the protection signal. Fig. 3-9 Connection of Input Circuit Breaker 46