Danfoss VLT DriveMotor FCP 106 Design Manual

Also see for VLT DriveMotor FCM 106: Operating instructions Operating instructions Design guide Programming guide Installation instructions

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Danfoss VLT DriveMotor FCP 106 Design Manual Manual pdf 29 page image

130BB958.12f swCable150 Hz3rd harmonics50 HzMainsRCD with low f cut-RCD with high f cut-Leakage currentFrequencyIllustration 2.23 Main Contributions to Leakage CurrentThe amount of leakage current detected by the RCDdepends on the cut-off frequency of the RCD.130BB957.11Leakage current [mA]100 Hz2 kHz100 kHzIllustration 2.24 Influence of the RCD Cut-off Frequency onLeakage CurrentWARNINGSHOCK HAZARDThe frequency converter can cause a DC current in thePE conductor and thus result in death or serious injury.• When a residual current-operated protectivedevice (RCD) is used for protection againstelectrical shock, only an RCD of Type B ispermitted on the supply side.Failure to follow the recommendation means that theRCD cannot provide the intended protection.2.8 Galvanic Isolation (PELV)PELV offers protection by way of extra low voltage.Protection against electric shock is ensured when theelectrical supply is of the PELV type and the installation ismade as described in local/national regulations on PELVsupplies.All control terminals and relay terminals 01-03/04-06comply with PELV (protective extra low voltage) (does notapply to grounded delta leg above 300 V).Galvanic (ensured) isolation is obtained by fulfillingrequirements for higher isolation and by providing therelevant creapage/clearance distances. These requirementsare described in the EN/IEC 61800-5-1 standard.The components that make up the electrical isolation alsocomply with the requirements for higher isolation and therelevant test as described in EN/IEC 61800-5-1.The PELV galvanic isolation is shown in Illustration 2.25.To maintain PELV, all connections made to the controlterminals must fulfil the requirements for PELV.195NA438.11+24 V18FunctionalisolationRS485RelayoutputHighvoltageControlPELV isolationMainsMotorDC busThermistorinput2131 High-voltage circuit2 I/O control card3 Custom relaysIllustration 2.25 Galvanic IsolationNOTICEHIGH ALTITUDEFor installation at altitudes above 2000 m (6562 ft),contact Danfoss hotline regarding clearance (PELV).Product Overview Design GuideMG03M202 Danfoss A/S © 06/2016 All rights reserved. 272 2