10-22Wiring ExamplesThis section provides wiring examples to connect a Braking Unit and other peripheral devices to the maincircuits, examples of wiring a transformer to Inverter I/O, and other aspects of Inverter wiring. Using a Braking Resistor UnitThis example shows wiring for a Braking Resistor Unit.CIMR-F7A20P4 to -F7A2018 (200 V Class Inverters of 0.4 to 18.5 kW)CIMR-F7A40P4 to -F7A4018 (400 V Class Inverters of 0.4 to 18.5 kW)Fig 10.93-phase power200 to 230 V 50/60 Hzor 380 to 460 V50/60 HzA sequence is required to turnOFF the power supply for the ther-mal overload relay trip contacts ofthe Braking Resistor Unit.Short-circuit barDC Reactor toimprove inputpower factor(Optional)Braking Resistor overheating contacts(Thermal overload relay trip contacts)Braking Resistor Unit *3InverterOverload relay trip contactof Braking Resistor UnitFault contactsMotor200 V Class Inverters: Ground to100 Ω max., 400 V Class Inverters:Ground to 10 Ω max.)* 1. A transformer is not required for 200 V Class* 2. Remove the short-circuit bar (normally connected) from + 1 and + 2 when connectinga DC Reactor (Optional).* 3. Disable stall prevention during deceleration by setting L3-04 and using a BrakingResistor Unit. The motor may not stop within the deceleration time if this setting isnot changed.* 4. When connecting an separately-installed type Braking Resistor Unit (model CDBR)to Inverters with built-in braking transistor (200 V/400 V 18.5 kW or less), connectthe B1 terminal of the Inverter to the + terminal of the Braking Resistor Unit and con-nect the − terminal of the Inverter to the − terminal of the Braking Resistor Unit. TheB2 terminal is not used in this case.R/L1S/L2T/L3U/T1V/T2W/T3MC
