Installation checklist and start-up107Connecting voltage to input terminals and auxiliary circuitWARNING! When voltage is connected to the input terminals, voltagemay also be connected to the auxiliary circuits of the drive unit(s).Make sure that it is safe to apply voltage. Ensure that:• nobody is working on the unit or circuits that are wired from outside intothe cabinets• covers of motor terminal boxes are in place.Close the circuit breaker which connects the 24 V DC supply voltage forthe boards [F7].Close the circuit breaker which connects the supply voltage for the ACfans and 24 V DC power supply [F11].Close the circuit breaker which connects the supply voltage for the fan inthe incoming cubicle [F101].Only with option +F253 or +F255.Close the circuit breaker which connects the control voltage for the mainbreaker [F12].Only with option +F255.Close the circuit breaker which connects the control voltage for theoptional emergency stop circuit [F21].Only with options Q951, Q952, Q963and Q964.Close the circuit breaker [F5] which connects the measuring board(BAMU) to the main circuit.Only with option +F253 or +F255.Check the circuit diagrams and close any other breakers and switches inthe auxiliary circuit. The composition vary depending on the options ofthe drive.Close the doors of the cabinets.Close the main breaker of the supply transformer.Close the auxiliary circuit switch [Q10].Starting the supply unitWARNING! If the drive is equipped with a brake unit, make sure thereare inverters connected to the intermediate circuit before start. As a ruleof thumb, the sum capacitance of the inverters connected must be atleast 30% of the sum capacitance of all inverters.Optional unit +D150.If there is not enough capacitive loadat start, the DC voltage will overshootthe controller voltage limit, causingimmediate start of braking. Anunloaded supply unit keeps the DCvoltage high and the chopperremains conductive.Open the grounding switch (if present) and close the drive maindisconnecting device.Note: The grounding switch and the main disconnecting device areeither mechanically coupled or electrically interlocked: The groundingswitch can be closed only when the main disconnecting device is open.The disconnector can be closed only when the grounding switch is open.Optional device (option +F259). Seedelivery specific circuit diagrams.Close the drive main disconnecting device:Units with a main breaker (option +F255):Unlock the withdrawn breaker and rack it in.Units with a main switch-disconnector (option +F253):Unlock the switch and turn it into the closed position.See delivery specific circuitdiagrams.Action Additional information
