ZIEHL-ABEGG MK090 Series Assembly Instructions Manual

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ZIEHL-ABEGG MK090 Series Assembly Instructions Manual Manual pdf 18 page image

5.4 EMC-compatible installation of control linesPay attention to sufficient distance from powerlines and motor wires to prevent interferences. Thecontrol cable may not be longer than 30 m. Screened control cables must be used when the cablelength is longer than 20 m. When using a shielded cable connect the shielding to one side only, i.e.only to the signal source with the protective earth (keep cable short and with as little inductance aspossible!).5.5 Mains connection5.5.1 Line voltageMains connection: PE, L1, and N. Here, it must be strictly observed that the mains voltage lies withinthe allowable tolerance specifications (see technical data).Alternatively a supply of DC voltage is possible (see Technical data).The polarities on “L1” and “N” are irrelevant.Danger due to electric current• Between the mains connection of the device and the protective earth “PE” is in no case a highervoltage permissible than the indicated line voltage of the device!• To activate the on current limitation, you must wait at least 90 seconds after switching off the linevoltage before switching back on!5.5.2 Required quality attributes for the mains voltageDanger due to electric currentThe mains voltage must comply with the EN 50160 quality characteristics and the defined standardvoltages in IEC 60038!5.5.3 Line protection fuseThe mains connection must be fused depending on the used cable, the type of routing, the operatingconditions and according to the standards applicable on site. The specification for the maximumadmissible line fuse of the device must be observed (see technical data).Possible components for the line protection (recommendation):• Safety fuses of operating class “gG” (whole range fuse cartridges for general applications accordingto EN 60269-1).• Line protection switch with characteristic “C” (according to EN 60898-1).• Motor protection switch with overload and short-circuit trigger (according to EN 60947-4-1). Settingovercurrent trigger to maximum permissible current of the line.5.5.4 Operating in IT-SystemDanger due to electric current• In the IT-System the neutral point of voltage supply is not grounded; in the case of a short-circuitbetween a phase (e.g. “L1”) and protective earth “PE” becomes the protective earth potential =phase.• Between the mains connection of the device and the protective earth “PE” is in no case a highervoltage permissible than the indicated line voltage of the device!1 ~ types can be used in IT-System in standard version. These may only be used in 3 ~ IT-Systems ifno higher voltage to the “PE” can occur than the specified mains voltage of the device even in case ofa fault to earth of a mains phase which is not used by the device (of none of the two power supplies).In order to ensure a trouble free operation in IT-System the “GND” potential of the control ports haveto be connected with the protective earth potential.As a consequence of these connection must be considered for the control ports (exception floatingrelay contacts):1. Connection only with wires, suitable for mains voltage and surrounding area.2. Connection with suitable isolated amplifiers only.Assembly instructions ECblue Electrical installationL-BAL-F055D-GB 1634 Index 002 Part.-No.18/51