Siemens 1MB21214CB512AG3

Siemens AC Motor, 4-Pole Low Voltage Continuous-Duty Type XP100, Series: 1MB, Explosionproof AC Motors, Squirrel Cage Motors Special Features, 250 hp, 460 VAC, 278 A, 60 Hz Frequency, 3 ph ph, 1800 rpm Speed, TEFC/IP65/IP54 Enclosure, 449T Frame, 3.37 in Dia x 8.5 in L Shaft, Bi-Directional Rotation, 1.15 Service Factor, Ball/Roller Bearing, 735 lb-ft Torque, Footed Mounting, 40 deg C, Insulation Class: Class F, Cast Iron, 20:1 Variable Torque Speed, 54.08 in W x 21.98 in H Dimensions

• Cast iron frame and end shields for exceptional structural integrity, with UL approved condensation/breather drains on 404T to 449T frames
• A unique rotor bar design provides improved efficiency while larger bars and end rings reduce resistance for lower rotor losses
• Each die-cast aluminum rotor assembly is dynamically balanced for extended bearing life and includes a high strength carbon steel (C1045) shaft for maximum rotor performance
• Manufactured with premium electrical grade steel laminations and copper electrical magnet wire to reduce losses and improved efficiencies
• A unique stator core design lowers flux density while increasing cooling capacity
• Large conductor cross section reduces resistance and lowers stator losses
• Proprietary class F, non-hygroscopic insulation system with NEMA class B temperature rise, provides an extra margin of thermal life
• Varnish system application ensures maximum wire penetration to provide protection from moisture, corrosion and electrical surges
• Two series connected normally closed class B thermostats are supplied as standard
• A bi-directional, non-sparking fan is locked and keyed to the shaft
• Its design reduces windage losses, improves airflow, reduces noise and provides dependable cooling
• Cast iron fan covers are provided on all frame sizes
• Regreasable, oversized single shielded bearings with cast iron inner caps
• Alemite® grease fittings on the inlets and pipe plugs on the relief ports for ease of routine maintenance
• Specially formulated, high temperature, polyurea based grease
• Oversized cast iron construction that is larger than industry standards, non-wicking, clearly and permanently marked leads
• Cast iron construction, zinc plated hardware, epoxy enamel paint and stainless steel nameplate resist rust and corrosion
• RAL7030 standard stone gray paint finish
• Thermostats, Klixon type, normally closed

• Full Engineering Drawing https://www.frenchgerleman.com/ASSETS/DOCUMENTS/ITEMS/EN/Siemens_1MB21214CB512AG3_Full_Engineering_Drawing.pdf
• Specification Sheet https://www.frenchgerleman.com/ASSETS/DOCUMENTS/ITEMS/EN/IDW_DOCUMENT_90c2dbc81d4500d5586f31656e87b7c5223585a39c605552dc8025aea8c9f274.pdf