Danfoss VLT Brook Crompton Motor FCM 300 Design Manual

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Danfoss VLT Brook Crompton Motor FCM 300 Design Manual Manual pdf 25 page image

into the spaces between the windings andinsulation, etc. Grease-removing solvents cancause damage to impregnating varnish orinsulation4. The FC-motor should be re-assembled in thereverse order from dismantling, remembering toease endshields onto bearings and spigots. DONOT USE FORCE.5. Before starting, check that the rotor revolvesfreely. Ensure that the electrical connections arecorrect.6. Refit any pulley, coupling, sprocket etc. which hasbeen removed, being particularly careful toensure correct alignment with the driven part, asmisalignment will lead to ultimate bearingtrouble and shaft breakage.7. When replacing screws and bolts, care should betaken to use only those with the requisite qualityand tensile strength recommended by themanufacturer. These must also be of identicalthread form and screw/bolt length (seeTable 2.24).2.2.9 FCM 300 Thermal ProtectionThe thermal protection of FC and motor is covered in thefollowing way:• Overload situations are handled by the calculatedelectrical load (I 2X t).• Missing ventilation and high ambienttemperature is handled by the temperaturemeasurement. The derating for low speed (due tomissing ventilation) is not incorporated in theelectrical load calculation but taken care of bythe temperature measurement. Forced ventilationis thus automatically covered.Electrical loadThe current is measured in the DC link and the estimatedload is calculated. The level of the electrical load is set atan output torque of 105%. Above that level a counter isincreased, below the level it is decreased. The counterstarts at zero. When the counter reaches 100, the unit trips.At 98 the warning indication goes on (LED and statusword).Load Time from 0 to 100 Time from 100 to 00% - 60 s20% - 100 s40% - 150 s60% - 200 s80% - 250 s105% 900 s (if over 105%) 300 s (if under 105%)120% 550 s -140% 210 s -160% 60 s ->165% 20 s -Table 2.21At full AC brake (parameter 400) a load > 165% issimulated => 20 s to trip.The value can be read in parameter 527. (LCP:FC thermal).The temperature measurement is sensing the temperaturewithin the electronics box.At warning level ⇒ Warning indication goes on (LED andstatus word) and the unit might trip if the temperaturedoesn't sink back below warning level within 15 minutes. Ifthe function TEMP.DEP.SW is activated in parameter 412,the switching frequency is decreased gradually down to 2kHz attempting to decrease the temperature.Trip level ⇒ Immediate trip and alarm indication (LED andstatus word).The value can be read in parameter 537 (LCP: Heat sinktemp.).The temperature levels seem to be high, but due to a localheating of the sensor the practical levels of the inside airtemperature are approx. 10° C lower.2.3 Local Control2.3.1 Service Plug Kit (175N2546)PurposeTo run LCP2 and PROFIBUS at the same time. The serviceplug can be used with FCM 300 of serial number 03Gxxxand software version as from 2.03. Used together withcable for plug kit 175N0162.Installation VLT® DriveMotor FCM SeriesMG03BA02 - VLT® is a registered Danfoss trademark 232 2