Westinghouse De-ion DM2F Instructions Manual Download | Manualshive

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Instructions for De-ion®

Air Circuit Breakers

Types DM2R, DM2F

Westinghouse Electric Corporation

Renewal Parts and Specialty Products

820

Washington Boulevard

Pittsburgh, Pennsylvania

15206

Effective February

1994

I.B. 201

www

. ElectricalPartManuals

. com

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Summary of Contents for De-ion DM2F

Page 1: ... Breakers Types DM2R DM2F Westinghouse Electric Corporation Renewal Parts and Specialty Products 820 Washington Boulevard Pittsburgh Pennsylvania 15206 Effective February 1994 I B 201 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 2: ...cular information is desired be sure to state fully and clearly the problem and attendant conditions giving the figure showing parts in question and using names for the parts as given Address all communications to the nearest Westinghouse Sales Office For a permanent record it is suggested that all nameplate data be duplicated and retained in a convenient location w w w E l e c t r i c a l P a r t...

Page 3: ...justment 6 Lubrication 6 Operating lrregularities 7 Pole Units Failing to Close 7 Holding Armature Fails to Hold 7 Breaker Slams Open When Closing 7 Renewal Parts Identification 7 1 8 201 List of Illustrations Figure Page Diagram of Breaker Operation with Bucking Bar 2 Schematic of Current Interruption 2 3 Schematic of Operating Mechanism 2 4 Use of Locking Bar 3 5 Polarity Hookups 4 6 Moving Cont...

Page 4: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 5: ... The bucking bar inductive shunt combination consists of a small bucking bar passing through the holding magnet and a lami nated iron circuit around the lower stud to force additional current through the bucking bar on high rates of rise The cur rent through the bucking bar under normal conditions is small and has very little neutralizing affect on the holding coil mag netic circuit Adjustments ar...

Page 6: ...p by the holding coil As the bucking bar current rises the resultant flux through the armature will be reduced to a value that permits the armature to be pulled away by the spring load on the linkage and the breaker will open As the breaker starts to open the main contacts part first and cause the current to flow through the arcing contacts as shown on Fig 2 The arcing contacts then part and an ar...

Page 7: ...s to pull away from the holding magnet when the breaker is closed then the forcing screw must be re tightened However the breaker must always be in the open position when adjusting the forcing screw For closing tests about 30 amperes at 125 V D C should be supplied to the closing coil of each pole unit tested The cur rent must not be applied for more than a few seconds at a time since the closing ...

Page 8: ...2F Feeder Breaker with upper stud negative lower stud positive Polarity Connection Factory Connection I 7 Breaker J t 4 F_H_ C 1 Holding Coil 4 1 4SHC 7 Breaker J 6 t 5 F TC 1 Tripping Coil 5STC 5 I Terminal Block on Breaker Forward Trip DM2R Rectifier Breaker with upper stud positive lower stud negative Polarity Connection 3 Factory Connection I 4SHC 7 Breaker t 1 f 4 F_H _ C 1 Holding Coil 1 t t...

Page 9: ...shing cloth or very fine emery paper with the grit side up on a surface plate Lay the ar ature n the polishing cloth and move it about carefully w1th a c1rcular motion until all high spots are removed 1 8 201 Fig 7 ARC Chute CAUTION The arc chamber contains ceramic material Handle carefully Do not drop tip over or bump Insulating parts of the arc chamber must withstand more than the full line pote...

Page 10: ...n C goes over toggle but cannot notice any return motion of the moving contact support The correct adjustment is 1112 turns over toggle The pull rod length can be adjusted if necessary by loosening the lock nut R removing pin Q and rotating the universal joint P to shorten or lengthen the pull rod assembly The universal joint has R H threads After adjustment place a screw driver blade between the ...

Page 11: ... 2 Armature or holding magnet surface is not flat 3 Poor connection in the holding coil current Breaker slams open when closing 1 Improper adjustment of toggle links 2 Faulty holding magnet or armature 10 Special Inquiries When communicating with Westinghouse regarding the product covered by this Instruction Book include all data contained on the nameplate attached to the equipment Also to facilit...

Page 12: ...1 8 201 Printed in U S A w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

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