Danfoss VLT AutomationDrive FC 300 Design Manual

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Danfoss VLT AutomationDrive FC 300 Design Manual Manual pdf 20 page image

2.5 Aggressive EnvironmentsAn adjustable frequency drive contains a large number ofmechanical and electronic components, many of which arevulnerable to environmental effects.CAUTIONThe adjustable frequency drive should not be installed inenvironments with airborne liquids, particles or gasescapable of affecting and damaging the electroniccomponents. Failure to take the necessary protectivemeasures increases the risk of stoppages, thus reducingthe life of the adjustable frequency drive.Degree of protection as per IEC 60529To prevent cross faults and short circuits betweenterminals, connectors, tracks, and safety-related circuitrycaused by foreign objects, the Safe Torque Off (STO)function must be installed and operated in an IP54 orhigher rated control cabinet (or equivalent environment).Liquids can be carried through the air and condense in theadjustable frequency drive and may cause corrosion ofcomponents and metal parts. Steam, oil, and salt watermay cause corrosion of components and metal parts. Insuch environments, use equipment with enclosure rating IP54/55. As an extra protection, coated printed circuit boardscan be ordered as an option.Airborne particles such as dust may cause mechanical,electrical or thermal failure in the adjustable frequencydrive. A typical indicator of excessive levels of airborneparticles is the presence of dust particles around theadjustable frequency drive fan. In very dusty environments,use equipment with enclosure rating IP54/IP55 or a cabinetfor IP00/IP20/TYPE 1 equipment.In environments with high temperatures and humidity,corrosive gases such as sulfur, nitrogen, and chlorinecompounds will cause chemical reactions on the adjustablefrequency drive components.Such chemical reactions will rapidly affect and damage theelectronic components. In such environments, mount theequipment in a cabinet with fresh air ventilation, keepingaggressive gases away from the adjustable frequency drive.Optional coated PCBs also offer protection in suchenvironments.NOTICE!Mounting adjustable frequency drives in aggressiveenvironments increases the risk of stoppages and consid-erably reduces the life of the drive.Before installing the adjustable frequency drive, check theambient air for liquids, particles and gases. This is done byobserving existing installations in this environment. Typicalindicators of harmful airborne liquids are water or oil onmetal parts, or corrosion of metal parts.Excessive dust particle levels are often found on instal-lation cabinets and existing electrical installations. Oneindicator of aggressive airborne gases is blackening ofcopper rails and cable ends.D and E enclosures have a stainless steel backchanneloption to provide additional protection in corrosiveenvironments such as salt air found near sea sideapplications. Proper ventilation is still required for theinternal components of the adjustable frequency drive.Contact Danfoss for additional information.2.5.1 HumidityThe adjustable frequency drive has been designed to meetthe IEC/EN 60068-2-3 standard, EN 50178 § 9.4.2.2 at122 °F [50 °C].2.5.2 VibrationThe adjustable frequency drive has been tested accordingto the procedure based on the following standards:• IEC/EN 60068-2-6: Vibration (sinusoidal) - 1970• IEC/EN 60068-2-64: Vibration, broad-band randomThe adjustable frequency drive complies with requirementsthat exist for units mounted on the walls and floors ofproduction premises, as well as in panels bolted to walls orfloors.Safety and Conformity Design Guide18 Danfoss A/S © Rev. 2014-02-10 All rights reserved. MG34S22222