Related Manuals for Rockwell Automation Allen-Bradley DC180ATZ
Summary of Contents for Rockwell Automation Allen-Bradley DC180ATZ
- Page 1 Installation, Operation and Maintenance Manual DC Motors • Frames DC180ATZ, C180ATZ and DC210ATZ...
-
Page 2: Table Of Contents
DC Motors General Description The products described in this publication are designed specifically for use on rectified power. The basic design includes Class F Insulation, 1.0 Service Factor, 40 degree C (104 degree F) ambient, continuous duty, with drip-proof guarded and force-ventilated enclosure, with horsepower speed ratings, overload and voltage in accordance with NEMA Standards. -
Page 3: Installation
DC Motors Handling ATTENTION: Eyebolt(s) or lifting lug(s) are intended for lifting the motor only with the standard accessories such as tachometer, brakes, etc., mounted by Allen-Bradley. The lifting means on the motor must not be used to lift the unit plus additional equipment. - Page 4 DC Motors Location Locate the machine where the ambient temperature is not over 40 degrees C (104 degrees F) and where clean air has free access to ventilating intake and outlet openings. Except for machines with a suitable protective enclosure, the location should be clean and dry.
- Page 5 DC Motors For example, a motor designed for a D type of power supply may be used on a C power supply having the same voltage rating. The types of power supplies are defined as follows. Description Code DC generator, battery or twelve pulse/cycle, 6 phase, full control Six pulse cycle, 3 phase, full control 230 or 460 volt, 60 Hz input to rectifier Three pulse/cycle, 3 phase, semi-bridge, half control 230 or 460 volt, 60 Hz input to rectifier D Three pulse/cycle, 3 phase, half-wave (single way) 460 volt, 60 Hz input to rectifier...
- Page 6 In the event of motor failure due to an over temperature condition, Rockwell Automation requires that motor thermal protective devices (when supplied) be adequately monitored and incorporated into the motor control system to maintain warranty.
- Page 7 DC Motors Mounting Motors must be mounted on a rigid, solid base or foundation. Poor base construction may cause resonances in the motor/base assembly which can result in bearing failure and other motor damage. All hold down bolts must be the correct grade for the type of mounting and must be torqued to their recommended value.
-
Page 8: Motor Application Data
DC Motors Direction of Rotation Unless otherwise ordered, brush rigging is assembled for NEMA standard direction of rotation, counterclockwise for motors and clockwise for generators facing the commutator end. These motors will operate in either direction of rotation, without changing the angle of the brush holders for normal field weakened speed ranges. - Page 9 DC Motors The speeds given in Table B are the maximum mechanically safe operating speeds for frames with standard construction. These speeds must not be exceeded under any condition. Motor control must hold the maximum speed under any load condition including no-load within the maximum safe speed.
- Page 10 DC Motors Shaft Extension and Method Of Drive V-belts should be within the limits of NEMA Standard MG1-14.67.a. Frames DC180ATZ, C180ATZ, DC210ATZ are supplied with the same size shaft for either coupled or belted drives. Table C Multipliers for Drives other than V-belt Drive Multiplier Flat Belt (See Note 1)
- Page 11 DC Motors Table E Radial Load Capacity Capacity at End of Shaft in kg (lbs.) Frame 2500 RPM 1750 RPM 1150 RPM 850 RPM DC210ATZ & 140.6 (310) 156.5 (345) 179.2 (395) 200.0 (440) DC180ATZ C180ATZ 226.8 (500) 256.3 (565) 283.5 (625) 283.5 (625) Data for motors with roller bearings at the drive end (back end).
-
Page 12: Operation
DC Motors Operation Balance Motors are dynamically balanced to commercial limits unless ordered differently. Balance is done with a full length 1/2 height shaft key. A full shaft key is shipped with the motor. Sheave or coupling should be balanced with a 1/2 height shaft key. - Page 13 DC Motors In addition to observing the above precaution, all precautions (Attentions) mentioned in this document should be observed. The following items must be checked before starting and during operation. • The armature should rotate freely and be clear of any obstructions. •...
- Page 14 DC Motors DC Motor Field Heating ATTENTION: To guard against motor damage caused by inadequate ventilation, assure that motors designed for forced ventilation as standard have cooling air when fields are excited at rated voltage. Installations having the air supply interrupted when the motor is not operating must have field disconnected or field voltage reduced to 67%, rated by means of field economizing resistor and relay.
-
Page 15: Maintenance
DC Motors 4. When contact is made, the needle will first deflect in either the up scale or down scale direction and then return to zero. Deflection will be in the opposite direction when contact is broken. 5. Relative polarities of the shunt and series fields are correct (ampere-turns are cumulative) if the voltmeter needle deflects up scale when contact is made and down scale when contact is broken. - Page 16 DC Motors Drive End Bearing Bearing fits in machined cavity in bracket with inner cap. To regrease bearing, remove bracket (four nuts hold bracket to frame) and inner cap (two bolts). Clean old grease from bearing and cavity and repack with Chevron SRI-2 or equivalent grease.
- Page 17 DC Motors Table J Relubrication Periods – Frames C180ATZ Relubrication Interval (Months) Maximum Normal Standard Severe Extreme Operating Speed (RPM) Frame Service Service Service 3450 and higher C180ATZ 2400 - 3449 C180ATZ 1700 - 2399 C180ATZ 800 - 1699 C180ATZ 500 - 799 C180ATZ 499 and lower...
- Page 18 DC Motors In general, mixing of greases is not recommended. If an incompatible grease is used, the lube system must be repacked completely with the new grease. 5. Wipe away any excess grease at the grease drain or relief and replace drain plugs.
- Page 19 DC Motors Replacement bearings should be ordered from Allen-Bradley in order to obtain the same carefully selected bearing as the original. Bearings should never be exposed by disassembly of the motor unless absolutely necessary for inspection or replacement of the bearing or maintenance in other parts of the machine.
- Page 20 DC Motors Commutation Intermittent sparking due to overloads or slight visible sparking does not necessarily indicate poor commutation. Poor commutation exists when there is excessive sparking requiring abnormal maintenance. Every case of excessive sparking should be investigated to determine the cause and correct it.
-
Page 21: Disassembly & Reassembly Instructions
DC Motors Windings For long life, keep windings clean and dry. Dirt or dust can be removed by wiping them with a clean cloth, by blowing with clean, dry, low pressure air or by vacuum cleaner. Oil or grease can be removed with a cloth moistened with mineral solvent. - Page 22 DC Motors Air Gap And Shimming (Frame C180ATZ) Main Pole Steel or brass shims, when used, are placed between pole and frame. If for any reason the shims are removed they must be replaced under the same poles. Main pole bolts are steel SAE Grade 5 (120,000 psi). Axial Float Frames C180ATZ have wavy spring washers between B.E.
- Page 23 DC Motors Brush Rigging and Brush Holders The brush holders in all motors are often constant pressure design and do not require nor are capable of adjustment over the life of the brushes. DC180ATZ & DC210ATZ Conduit box is attached to the commutator end top hand hole cover and cannot be located on the side.
- Page 24 The latest motor information can be obtained from the Allen-Bradley Drives & Motors home page on the World Wide Web at: http://www.controlmatched.com 1325L-UM001B-EN-P – August, 2001 Publication Supersedes 1325L-UM001A-EN-P dated May, 2001 Copyright © 2001 Rockwell Automation. All rights reserved. Printed in USA.