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Summary of Contents for Westinghouse De-ion DM2R
- Page 1 Instructions for De-ion® Air Circuit Breakers I.B. 201 Types DM2R, DM2F Westinghouse Electric Corporation Renewal Parts and Specialty Products 820 Washington Boulevard Pittsburgh, Pennsylvania 15206 Effective February 1994...
- Page 2 Address all communications to the nearest Westinghouse Sales Office. * For a permanent record, it is suggested that all nameplate data be duplicated and retained...
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Page 3: Table Of Contents
Table of Contents List of Illustrations Page Description Figure Page General Information Introduction ........Diagram of Breaker Operation Application ........with Bucking Bar ....Shipment and Storage ...... -
Page 5: General Information
General Information Introduction , - Arcing Contacts The purpose of this instruction book is to familiarize the user with the characteristics of Types DM2F DM2R air circuit & Upper Stud breakers. The book contains important information concerning installation, operation and maintenance. Types DM2F &... -
Page 6: Description And Installation
If the breaker is to be stored, it should be kept in a warm dry holding magnet and armature which is opposite to the flux set location, protected from water, oil, dirt, or other damage. The up by the holding coil. As the bucking-bar current rises, the arc chambers must be kept covered to prevent foreign particles resultant flux through the armature will be reduced to a value lodging between the ceramic arc plates. -
Page 7: Installation
tact arm will be pulled open by the spring F. Pin C remains nearly stationary until the contact arm is open, then it is moved upward by the retrieving spring, S, in the closing magnet. The other toggle is comprised of pin C, Fig. 3, and the links on either side. - Page 8 The polarity of the holding coil current and trip coil current should be checked carefully to insure proper tripping of the breaker. The effect of trip coil current is always opposite that of the holding coil current. However, if the breaker is equipped with a bucking bar-inductive shunt combination, the holding current polarity is determined by the desired tripping direction of current through the bucking bar.
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Page 9: Detailed Inspection
Fig. ARC Chute Fig. Moving Contact Assembly (4000A) CAUTION Detailed Inspection Make sure that all bolts, nuts, terminal connections, etc. are fastened securely. Check for evidence of wear or improper The arc chamber contains ceramic material. Handle adjustment and operation of the various parts. carefully. -
Page 10: Contact Assembly
not move far enough, then the breaker will tend to slam open Contact Assembly The contacts should be checked periodically for wear and during electrical closing. The pull rod length should be ad adjustment. Under normal conditions, the contacts should be justed so that the operator can feel a definite snap as pin C good for a large number of operations. -
Page 11: Operating Lrregu Larities
7. Closing Coil using names for the parts as given. Holding/Trip Coil Address all communications to the nearest Westinghouse Shunt Trip Coil Sales Office. 10. Finger Clusters For a permanent record, it 1s suggested that all nameplate data be duplicated and retained a conven1ent location I.B. - Page 12 1.8. 201 U.S.A. Printed in...
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