Standard Motor Catalog

Section TR Technical Reference Guide

COUPLINGS Motors are normally furnished without couplings; however, a one-piece half coupling can be installed on the motor shaft at the factory providing it is balanced, finished machined and key-seated to motor shaft dimensions. It must be shipped prepaid to the factory of motor manufacturer before the start of production. Motors are dynamically balanced prior to installing the half coupling and are not rebalanced after coupling assembly. A vibration test with half-coupling installed will be performed and a test report issued when this special service is requested by the customer and included in the quotation. DOWEL HOLES IN FEET Dowel holes are furnished as standard on 500 frame motors as an alignment aid. One 1/2 inch hole is provided in each Horizontal motors are available with C-face, and D-flange endshields, which have rabbets and bolt holes for mounting equipment to the motor, or for overhanging the motor on a driven machine. The C-face endshield provides a male rabbet and tapped holes for mounting bolts. This endshield is used for mounting small apparatus, such as pumps, to the motor. The D-flange has a male rabbet, with holes in the flange for through bolts. This flange is primarily used on machine-tool gear boxes and compressors. of the diagonally opposite feet. ENDSHIELDS, SPECIAL

2. Brake Voltage Brakes are supplied for operation on the same voltage as the motor unless otherwise specified. In the case of dual voltage motors, brake voltage will be the lower of the motor voltages, unless otherwise specified. Standard brake voltages are: 60 HZ: 200, 230, 460, 575 volts 50 HZ: 200, 220, 380, 415, 440, 550 volts Stearns brakes are all single-phase. Brake leads are terminated at a conduit connection on the brake. 3. Brake Enclosure Brakes are available in enclosures to match the needs of the environment in which they will be operating. Standard enclosure is for application on dripproof or totally-enclosed fan-cooled motors for indoor or semi protected outdoor installations. Dust-tight, waterproof enclosure is suitable for severe-duty and totally-enclosed motors used in conditions of extreme moisture, abrasive or conductive dusts, acid or alkali fumes or for outdoor installation. 4. Vertical Mounting Position Brakes must be specially modified for vertical mounting. Specify if the motor will be above or below the brake. CONDUIT BOX, SPECIAL Standard conduit boxes meet or exceed NEMA and NEC volumes and are adequate for connecting all necessary leads for power and any incidental control circuits. Available options for motors in frames 182 through 449 include extra 3/4 inch conduit hole for dripproof, TENV and TEFC motors, additional conduit box, waterproof conduit box and oversized box. Motors in frames 509-5013 are available with a 2500 cubic inch motor mounted box suitable for stress cone connections or for mounting accessory equipment. This special box is furnished as standard for all motors of 3000 volts and above. Three stand-off insulator-supported copper bar terminations for motor leads can be furnished. An 11,000 and a 17,000 cubic inch motor mounted conduit box are available. In addition, a 44,000 cubic inch floor mounted, conduit box is available to mount beside the motor with conduit connection to the motor frame. This construction allows the customer to mount accessories such as current transformers, surge capacitors, lightning arrestors, etc. 315 frame IEC conduit boxes are cast iron or fabricated steel depending on the size of the box. The box is severe duty, with lead gasket and ground terminal. Motors up to 690 volt will have a terminal block, above 690 volt will have standoff terminals.

Figure 29: Type C-Face

TR.35

Data subject to change without notice. 02/23 • www.gemotorswolong.com