Eaton H-Max Series Installation Manual

Also see for H-Max Series: Quick start guide Installation manual Installation manual Manual

Engineering8Bypass OperationIf you want to have the option of operating the motor withthe frequency inverter or directly from the input supply, theinput branches must be interlocked mechanically.CAUTIONDebounced inputs may not be used in the safety circuitdiagram.A changeover between the frequency inverter and the inputsupply must take place in a voltage-free state.WARNINGThe frequency inverter outputs (U, V, W) must not beconnected to the input voltage (destruction of thedevice, risk of fire).Bypass Motor Control (Example)CAUTIONDebounced inputs may not be used in the safety circuitdiagram.Switch S1 must switch only when frequency inverter T1 is atzero current.Contactors and switches (S1) in the frequency inverteroutput and for the direct start must be designed based onutilization category AC-3 for the rated operational current ofthe motor.Connecting EX MotorsNote the following when connecting explosion-protectedmotors:● The frequency inverter must be installed outside the EXarea● Note the branch- and country-specific standards forexplosion-protected areas (ATEX 100a)● Note the standards and information of the motormanufacturer regarding operation on frequency inverters—for example, if motor reactors (du/dt-limiting) or sinusfilters are specified● Temperature monitors in the motor windings (thermistor,thermo-Click) are not to be connected directly to frequencyinverters but must be connected via an approved triggerapparatus for EX areasItemNumber Description1 Input/bypass contactor2 Output contactorQ1I> I>I>Q11S1M1T1M3~L1 L2 L3L1 L2 L3U V W

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