EM630/TC6A Closed-Loop Vector Hoist Inverter User Manual 3.2.4 Standard Wiring of Main Circuit The standard wiring of the main circuit of EM630 inverter is shown in Figure 3–4. EM630-4R0-3B - EM630-075-3B EM630-022-3 - EM630-400-3 Braking resistor (optional) PB Braking resistor (optional) Braking unit (optional) R U R U S W T V M S V M T W Figure 3–4 Standard Wiring of Main Circuit 3.2.5 Wiring on Input Side of Main Circuit 3.2.5.1 Circuit Breaker Installation An air circuit breaker (MCCB) corresponding to the inverter is required between the power supply and the input terminals. The capacity of MCCB shall be 1.5 to 2 times that of the rated current of the inverter.
The time characteristics of MCCB must meet the time characteristics of the overheating protection of the inverter (150% rated current/1 minute). When MCCB is used with multiple inverters or other devices, please connect the contact of the fault output relay to power contactor coil, so that the power supply will be turned off by a fault signal (Figure 3–5). EM630 Inverter MCCB R S EB Fault Relay Contact EC T OFF ON MC Figure 3–5 Connecting to Input Circuit Breaker 32