PA7300 Instruction Manual - TECO-Westinghouse Motor Company

4. WIRING4.1 NOTES ON WIRING TO PERIPHERAL UNITSPower SupplyMCCBMCAC REACTORINPUT NOISE FILTER7300PAOUTPUT NOISE FILTER3 ACINDUCTION MOTORMCCB (molded case circuit breaker)Please refer to Table 1. for MCCB selection.Do not use a circuit breaker for start/stop operation.When a ground fault interrupter is used, select the one withno influence for high frequency. Setting current should be200mA or above and the operating time at 0.1 second orlonger to prevent malfunction.MC (magnetic contactor)It is not always necessary to have the MC on the input side.However, an input MC can be used to prevent an automaticrestart after recovery from an external power loss duringremote control operation.Do not use the MC for start/stop operation.AC REACTORTo improve power factor or to reduce surge, install an ACreactor. There is a DC choke built-in on 7300PA, models40HP(30 KW) and larger. The 440V 350 ~ 500HP need toinstall AC reactor externally.Input Noise FilterWhen used with specified input noise filter, the 7300PA cancomply with EN55011 class A. Please refer to our EMCtechnical manual for noise filter selection.InverterWire input to terminals L1, L2 and L3 for three phase input.Make sure to connect the ground terminal to an appropriatesafety ground.Output Noise Filter (EMI Suppression zero core)When used with output noise filter, radiated and conductedemissions may be reduced.MotorWhen multiple motors are driven in parallel with an inverter,the inverter rated current should be at least 1.1 times thetotal motor rated current. Make sure that the motor and theinverters are separately grounded.9