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MULTISPEED STARTERS
Eaton offers Multi-Speed Starters using the NEMA Freedom and Advantage Starters. Multi-Speed starters are offered for two speed one winding and two speed two winding motor applications. Available in combination and non-combination designs, and in a wide variety of enclosure types. Enclosure Types NEMA Type 1 (Conforms to IP40)— for Indoor Use Suitable for most applications where unusual service conditions do not exist and where a measure of protection from accidental contact with enclosed equipment is required. Designed to meet tests for rod entry and rust resistance. Enclosure is sheet steel, treated to resist corrosion. Depending on the size, knock-outs are provided on the top, bottom and sometimes on the side. NEMA Type 3R (Conforms to IP52)— for Outdoor Use Primarily intended for applications where falling rain, sleet or external ice formations are present. Gasketed cover. Designed to meet tests for rain, rod entry, external icing and rust resistance. Enclosure is sheet steel, treated to resist corrosion. Depending on the size, a blank cover plate is attached to the top (for a conduit hub) and knockouts are pro- vided on the bottom. Cover-mounted pilot device holes are provided and covered with hole plugs. NEMA Type 4 (Conforms to IP65)— for Indoor or Outdoor Use Provide measure of protection from splashing water, hose-directed water and wind blown dust or rain. Constructed of sheet steel with gasketed cover. Designed to meet tests for hose-down, external icing and corrosion protection. Enclosure has two water- tight hubs (power) installed top and bottom of one control hub installed in bottom — depending on size. Cover-mounted pilot device holes are provided and covered with hole plugs. NEMA Type 4X (Conforms to IP65)— for Indoor or Outdoor Use Provide measure of protection from splashing water, hose-directed water, wind blown dust, rain and corrosion. Constructed of stainless steel with gasketed cover. Designed to meet same tests as Type 4 except enclosure must pass a 200-hour salt spray corrosion resistance test. NEMA Type 7— for Hazardous Gas Locations For use in Class I, Group C or D indoor locations as defined in the National Electrical Code. NEMA Type 7 enclosures must withstand the pressure generated by explosion of internally trapped gases and be able to contain the explosion so that gases in the surrounding atmosphere are not ignited. Under normal operation, the surface temperature of the enclosure must be below the point where it could ignite explosive gases present in the surrounding atmosphere. Designed to meet explosion, temperature and hydrostatic design tests. NEMA Type 9— for Hazardous Dust Locations For use in Class II, Group E, F or G indoor locations as defined in the National Electrical Code. Heat generating devices within the enclosure are designed to maintain the surface temperature of the enclosure below a point where it could ignite the dust-air mixture in the surrounding atmosphere or cause discoloration of surface dust. These enclosures are designed to meet tests for dust penetration, temperature and aging of gasket (if used). NEMA Type 12 (Conforms to IP62)— for Indoor Use Provide a degree of protection from dripping liquids (non-corrosive), falling dirt and dust. Designed to meet tests for drip, dust and rust resistance. Constructed of sheet steel. Hole plugs cover pilot device holes. There are no knockouts, hub cover plates or hubs installed. Many Cutler-Hammer NEMA Type 12 enclosures are suitable for use in Class II, Division 2, Group G and Class III, Divisions 1 and 2 locations as defined in the National Electrical Code. NEMA Type 12 — Modified for Outdoor Use- NEMA Type 12 enclosures can be modified for NEMA Type 3R outdoor use as follows: NEMA Type 3R — use watertight conduit hub or equivalent provision for watertight connection at conduit entrance. A provision for drainage is made (1/8 inch diameter). The Type 12 enclosure can be ordered with a safety interlock on the door that can be padlocked off. A vault-type door latch system is used. A tapered plate holds the gasketed door tight against the case edge to provide a positive seal. The special door interlock consists of the door handle and a screwdriver operated cover defeater. The cover defeater and the disconnect interlock defeater are both recessed screwdriver operated devices which cannot be manipulated with other types of tools. |
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