Danfoss VLT FC 100 Operating Instructions Manual

Also see for VLT FC 100: Service manual Instruction manual

Contents

Danfoss VLT FC 100 Operating Instructions Manual Manual pdf 67 page image

4.1.14 FusesBranch circuit protection:In order to protect the installation against electrical and fire hazard, all branch circuits in an installation, switch gear, machines etc., must be short-circuited and over-current protected according to 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 mentionedbelow to protect service personnel and equipment in case of an internal failure in the frequency conveter. The frequency converter provides full short-circuit protection 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 inter-nal over-current protection that can be used for upstream overload protection (UL-applications excluded). See par. 4-18Current Limit. Moreover, fusesor circuit breakers can be used to provide the over-current protection in the installation. Over-current protection must always be carried out accordingto national regulations.Non UL complianceIf UL/cUL is not to be complied with, we recommend using the follow-ing fuses, which will ensure compliance with EN50178:P110 - P250 380 - 480 V type gGP315 - P450 380 - 480 V type gRUL Compliance380-480V, frame sizes D, E and FThe fuses below are suitable for use on a circuit capable of delivering 100,000 Arms (symmetrical), 240V, or 480V, or 500V, or 600V depending on thedrive voltage rating. With the proper fusing the drive Short Circuit Current Rating (SCCR) is 100,000 Arms.Size/TypeBussmannE1958JFHR2**BussmannE4273T/JDDZ**SIBAE180276JFHR2LittelFuseE71611JFHR2**Ferraz-ShawmutE60314JFHR2**BussmannE4274H/JDDZ**BussmannE125085JFHR2*InternalOptionBussmannP110 FWH-300JJS-3002061032.315 L50S-300 A50-P300 NOS-300170M3017 170M3018P132 FWH-350JJS-3502061032.35 L50S-350 A50-P350 NOS-350170M3018 170M3018P160 FWH-400JJS-4002061032.40 L50S-400 A50-P400 NOS-400170M4012 170M4016P200 FWH-500JJS-5002061032.50 L50S-500 A50-P500 NOS-500170M4014 170M4016P250 FWH-600JJS-6002062032.63 L50S-600 A50-P600 NOS-600170M4016 170M4016Table 4.2: Frame Size D, Line Fuses, 380-480VSize/TypeBuss-mannPN*Rating Ferraz SibaP315 170M4017700A,700V6.9URD31D08A070020 610 32.700P355 170M6013900A,700V6.9URD33D08A090020 630 32.900P400 170M6013900A,700V6.9URD33D08A090020 630 32.900P450 170M6013900A,700V6.9URD33D08A090020 630 32.900Table 4.3: Frame Size E, Line Fuses, 380-480V4 Electrical InstallationVLT HVAC Drive High Power Operating In-structions66 MG.11.F3.02 - VLT® is a registered Danfoss trademark4