Danfoss VLT AHF005 Design Manual

Contents

Danfoss VLT AHF005 Design Manual Manual pdf 33 page image

6.2 Electrical Installation6.2.1 Over Temperature ProtectionThe Danfoss harmonic filters AHF005 and AHF010 are all equipped with a galvanic isolated switch (PELV) that is closed undernormal operating conditions and open if the filter is overheated.NOTEThe over temperature protection must be used to prevent damage of the filter caused by over temperature. An immediate stopor a controlled ramp down within max. 30 sec. has to be performed to prevent filter damage.There are many ways the switch can be used and one example is to connect terminal A of the harmonic filter to terminal 12 or13 (voltage supply digital input, 24V) of the Danfoss frequency converter and terminal B to terminal 27. Program digital inputterminal 27 to Coast Inverse. The frequency converter will coast the motor and thereby unload the filter if an over temperature isdetected. Alternatively use terminal 12/33 and set 1-90 Motor Thermal Protection.X3.1 X3.2 X3.3 X4.1 X4.2 X4.3X1.1X1.2X1.3X2.1X2.2X2.3A B91 (L1 96 (U)97 (V)98 (W)92 (L2)93 (L3)95 (PE)PE01 02Relay24V DC24 - 240V ACdepending oncontactor typeCapacitordisconnect(optional)12(24 V)27(coast inverse)99 (PE)AHF VLTFrequencyconverterMainssupplyMotorPE130BB904.10Illustration 6.1 Connection DiagramNOTEThe maximum rating of the over temperature contactor is 250V AC and 10A.How to Install AHF005/010 Design Guide32 MG.80.C4.02 - VLT® is a registered Danfoss trademark66