Danfoss VLT HVAC Drive FC 100 Operating Instructions Manual

Also see for VLT HVAC FC 100: Service manual Operating instructions Instruction manual

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Danfoss VLT HVAC Drive FC 100 Operating Instructions Manual Manual pdf 54 page image

3.6.14. FusesBranch circuit protectionIn order to protect the installation against electrical and fire hazard, all branch circuits in an in-stallation, switch gear, machines etc., must be short-circuited and over-current protected accord-ing to national/international regulations.Short-circuit protectionThe frequency converter must be protected against short-circuit to avoid electrical or fire hazard.Danfoss recommends using the fuses mentioned below to protect service personnel and equip-ment in case of an internal failure in the drive. The frequency converter provides full short-circuitprotection in case of a short-circuit on the motor output.Over-current protectionProvide overload protection to avoid fire hazard due to overheating of the cables in the installation.The frequency converter is equipped with an internal over-current protection that can be used forupstream overload protection (UL-applications excluded), see par. 4-18. Moreover, fuses or circuitbreakers can be used to provide the over-current protection in the installation. Over-current pro-tection must always be carried out according to national regulations.Fuses must be designed for protection in a circuit capable of supplying a maximum of 100,000Arms (symmetrical).Fuse TablesSize/TypeBuss-mannE1958JFHR2**Buss-mannE4273T/JDDZ**SIBAE180276RKI/JDDZLittelFuseE71611JFHR2**Ferraz-ShawmutE60314JFHR2**Buss-mannE4274H/JDDZ**BussmannE125085JFHR2*InternalOptionBussmannP110 FWH-300JJS-3002028220-315L50S-300 A50-P300 NOS-300170M3017 170M3018P132 FWH-350JJS-3502028220-315L50S-350 A50-P350 NOS-350170M3018 170M4016P160 FWH-400JJS-400206xx32-400L50S-400 A50-P400 NOS-400170M4012 170M4016P200 FWH-500JJS-500206xx32-500L50S-500 A50-P500 NOS-500170M4014 170M4016P250 FWH-600JJS-600206xx32-600L50S-600 A50-P600 NOS-600170M4016 170M4016Table 3.5: D enclosures, 380-480 V*170M fuses from Bussmann shown use the -/80 visual indicator, -TN/80 Type T, -/110 or TN/110 Type T indicator fuses of the same size and amperage may be substituted for external use**Any minimum 480 V UL listed fuse with associated current rating may be used to meet ULrequirements.Size/TypeBussmannE125085JFHR2AmpsSIBAE180276JFHR2Ferraz-ShawmutE76491JFHR2P110 170M3017 315 2061032.315 6.6URD30D08A0315P132 170M3018 350 2061032.350 6.6URD30D08A0350P160 170M4011 350 2061032.350 6.6URD30D08A0350P200 170M4012 400 2061032.400 6.6URD30D08A0400P250 170M4014 500 2061032.500 6.6URD30D08A0500P315 170M5011 550 2062032.550 6.6URD32D08A0550Table 3.6: D enclosures, 525-600 V3. How to InstallVLT® HVAC DRIVE High PowerOperating Instruction54 MG.11.F1.02 - VLT® is a registered Danfoss trademark3