Danfoss FC 300 Operating Instruction

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Danfoss FC 300 Operating Instruction Manual pdf 22 page image

FC 300 Operating InstructionsHow to Install" FusesBranch circuit protection:In order to protect the installation against electrical and fire hazard, all branch circuits inan installation, switch gear, machines etc., must be shortcircuit and overcurrent protectedaccording to the national/international regulations.Short circuit protection:The 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 or otherequipment in case of an internal failure in the drive. The frequency converter provides full shortcircuit protection in case of a short-circuit on the motor output.Over current protection:Provide 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 usedfor upstream overload protection (UL-applications excluded). See par. 4-18. Moreover, fuses orcircuit breakers can be used to provide the over current protection in the installation. Over currentprotection must always be carried out according to national regulations.Fuses must be designed for protection in a circuit capable of supplying a maximum of100,000 A rms (symmetrical), 500 V maximum.Non UL complianceIf UL/cUL is not to be complied with, werecommend using the following fuses, which willensure compliance with EN50178:In case of malfunction, not following therecommendation may result in unnecessarydamage of the frequency converter.FC 30X Max. fuse size Voltage TypeK25-K75 10A 1) 200-240 V type gG1K1-2K2 20A 1) 200-240 V type gG3K0-3K7 32A 1) 200-240 V type gGK37-1K5 10A 1) 380-500 V type gG2K2-4K0 20A 1) 380-500 V type gG5K5-7K5 32A 1) 380-500 V type gG11K 63A 1) 380-500 V type gG15K 63A 1) 380-500 V type gG18K 63A 1) 380-500 V type gG22K 80A 1) 380-500 V type gG1) Max. fuses - see national/internationalregulations for selecting an applicable fuse size.UL Compliance200-240 VFC 30X Bussmann Bussmann Bussmann SIBA Littel fuse Ferraz-ShawmutFerraz-ShawmutkW Type RK1 Type J Type T Type RK1 Type RK1 Type CC Type RK1K25-K75 KTN-R10 JKS-10 JJN-10 5017906-010 KLN-R10 ATM-R10 A2K-10R1K1-2K2 KTN-R20 JKS-20 JJN-20 5017906-020 KLN-R20 ATM-R20 A2K-20R3K0-3K7 KTN-R30 JKS-30 JJN-30 5012406-032 KLN-R30 ATM-R30 A2K-30R22 MG.33.A7.02 - VLT is a registered Danfoss trademark