User Manual of EM730 Series Inverter 3.2.3 Standard wiring diagram of main circuit The standard wiring diagram of the main circuit of the EM730 series inverter is shown in Fig. 3-3. Wiring of built-in brake unit Wiring of external brake unit 3.2.4 Input side wiring of main circuit Fig.3-3 Standard Wiring of Main Circuit 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 of the 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 in Fig.3-4, to disconnect the power supply according to the protection signal. 34 P, DC reactor terminal, for the external DC reactor of EM730-090-3 and above Grounding terminal, connected to earth