Westinghouse DB-75 Manuals

4 pdf manual(s) Westinghouse DB-75 for free download (Document Types: Instructions manual, Manual )

Westinghouse DB-75 Instructions manual [PDF] (38 pages)

  • Identifier: id-1637011
  • Brand: Westinghouse
  • Device: DB-75 Circuit breakers
  • Type: PDF
  • Key Aspects: Operational Mode Explanations, Pre-Deployment Preparation Steps, Efficiency and Calibration Tips
  • UPD Date: 09.08.2026
  • Source File: 1681718.pdf
  • Pages: 38
  • Description: Device technical manual for the Westinghouse DB-75.
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  • . v’i TABLE OF CONTENTS RECEIVING, HANDLING AND STORING Page 7 Part One 7 Inspection Storing... 7 INSTALLATION Pages 8-11 Past Two 8 Connections Enclosures.. 8 MAINTENANCE Pages 12-24 Part Three 14 Pole Unit Contacts Maintenance of Contacts . Operating Mechanism Closing Solenoid. Overcurrent Tripping Device Description. Construction Installation and Removal Adjustment of Trip Screw Operation Standard Overcurrent Tripping Device Selective Overcurrent Trip
  • TABLE Part Three MAINTENANCE (Continued) Pages 24-30 Alarm Switch Attachment. Inspection Maintenance Electric Lockout Attachment . Inspection Maintenance Key Lock Attachment , Inspection Maintenance Key Interlock Attachment Inspection Maintenance Rectifier Unit for A-C Undervoltage and A-C Electric Lockout Attachments Inspection . Maintenance Reverse Current Trip Attachment Inspection Maintenance Field Discharge Switch Recommended Spare Parts 26 26 29 29 2
  • !i /V V c f V:^ LIST OF ILLUSTRATIONS Page Figure 1 DB-75 Outline and Mounting Dimensions 1A DB-100 Outline and Mounting Dimensions IB DBF-40 Outline and Mounting Dimensions 1C DB-75 Outline and Mounting Dimensions 2 Typical Wiring Diagrams 3 Cross-Sectional View of DB-75 and DB-100 Circuit Breakers 3A DB-75 and DB-100 Three Position Operating Mechanism 4 Adjusting Limits of Main and Arcing Contacts for DB-75 and DB-100 Cir- cuit Breakers 5 Closing Solenoi
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Instructions for Types DB-75, DB-100 and DBF-40 Air Circuit Breakers 600 volts A-C 250 Volts D-C Continuous Current Rating DB-75 DB-100 4,000 Amperes 5,000 Amperes / D-C 6,000 Amperes{Only 2,000 Amperes 2,500 Amperes, 3,000 Amperes Westinghouse Electric Corporation Switchgear Division, East Pittsburgh, Pa. I. B. 33-850-4 & 5D, Effective November, 1966. Supersedes I. B. 33-850-4 & 5C, May, 1962. Courtesy of NationalSwitchgear.com

Westinghouse DB-75 Instructions manual [PDF] (36 pages)

  • Identifier: id-1637012
  • Brand: Westinghouse
  • Device: DB-75 Circuit breakers
  • Type: PDF
  • Key Aspects: Troubleshooting Information, Standard Operating Procedures, Advanced Configuration Methods
  • UPD Date: 18.04.2026
  • Source File: 1681717.pdf
  • Pages: 36
  • Description: Professional user manual for the Westinghouse DB-75.
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  • 2 TABLE OF CONTENTS Part One RECEIVING, HANDLING AND STORING Page 7 Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Storing.... ....... ..... ..... ......... . ................................. 7 Part Two INSTALLATION Pages 8-11 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Enclosures. .
  • TABLE OF CONTENTS (Continued) Part Three MAINTENANCE (Continued) Pages 24-30 Alarm Switch Attachment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Elec
  • 4 LIST OF ILLUSTRATIONS Figure Page 1 DB-75 Outline and Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . 9 IA DB-100 Outline and Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 lB DBF-40 Outline and Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 IC DB-75 Outline and Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2 Typical Wiring Diagrams . . . .
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.,.' . . ; Instructions for Types DB-75, DB-100 and DBF-40 Air Circuit Breakers 600 Volts A·C 250 Volts D·C Continuous Current Rating DB-75 DB-100 2,000 Amperes 4,000 Amperes 2,500 Amperes 5,000 Amperes l D·C 3,000 Amperes 6,000 Amperes ~ Only Westinghouse Electric Corporation Switchgear Division, East Pittsburgh, Pa. J.B. 33-8S()4 & SE, Effective September, 1976. Supersedes J.B. 33-8S()4 & SD, November, 1966. 1 - ·· . Courtesy of NationalSwitchgear.com

Westinghouse DB-75 Manual  [PDF] (36 pages)

  • Identifier: id-2292421
  • Brand: Westinghouse
  • Device: DB-75 Circuit breakers
  • Type: PDF
  • Key Aspects: Step-by-Step Assembly Procedures, Common Issue Diagnostic Flows, Pre-Installation Safety Requirements
  • UPD Date: 10.09.2026
  • Source File: 1995204.pdf
  • Pages: 36
  • Description: Instruction and reference manual for the Westinghouse DB-75.
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  • V If i TABLE OF CONTENTS RECEIVING, HANDLING AND STORING Page 7 Pazt One 7 Inspection Storing... 7 INSTALLATION Pages 8-11 Part Two Connections Enclosures.. 8 8 MAINTENANCE Pages 12-24 Part Three Pole Unit Contacts Maintenance of Contacts Operating Mechanism Closing Solenoid Overcurrent Tripping Device Description Construction Installation and Removal Adjustment of Trip Screw Operation Standard Overcurrent Tripping Device Selective Overcurrent Tripping Dev
  • TABLE Part Three MAINTENANCE (Continued) Pages 24-30 Alarm Switch Attachment Inspection Maintenance Electric Lockout Attachment Inspection Maintenance Key Lock Attachment Inspection Maintenance Key Interlock Attachment Inspection Maintenance Rectifier Unit for A-C Undervoltage and A-C Electric Lockout Attachments Inspection Maintenance Reverse Current Trip Attachment Inspection Maintenance Field Discharge Switch Recommended Spare Parts 26 26 29 29 29 29 29
  • LIST OF ILLUSTRATIONS Page Figure 1 DB-75 Outline and Mounting Dimensions 1A DB-100 Outline and Mounting Dimensions IB DBF-40 Outline and Mounting Dimensions 1C DB-75 Outline and Mounting Dimensions 2 Typical Wiring Diagrams 3 Cross-Sectional View of DB-75 and DB-100 Circuit Breakers 3A DB-75 and DB-100 Three Position Operating Mechanism 4 Adjusting Limits of Main and Arcing Contacts for DB-75 and DB-100 Cir- cuit Breakers 5 Closing Solenoid—Construction
  • I.B. 33-850-4 & 5 “DB” AIR CIRCUIT BREAKERS WESTINGHOUSE AIR CIRCUIT BREAKERS TYPE
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Instructions for Types DB-75, DB-100 and DBF-40 Air Circuit Breakers 600 Volts A-C 250 Volts D-C Continuous Current Rating DB-75 DB-100 2,000 Amperes 2,500 Amperes 3,000 Amperes 4,000 Amperes 5,000 Amperes[ D-C 6,000 Amperes(Only Westinghouse Electric Corporation Switchgear Division, East Pittsburgh, Pa. I.B. 33-850-4 & 5E, Effective September, 1976. Supersedes I.B. 33-850-4 & 5D, November, 1966. Courtesy of NationalSwitchgear.com

Westinghouse DB-75 Instructions manual [PDF] (32 pages)

  • Identifier: id-2084321
  • Brand: Westinghouse
  • Device: DB-75 Circuit breakers
  • Type: PDF
  • Key Aspects: Risk Mitigation and Accident Prevention, Technical Data and Parameters, Operational Mode Explanations
  • UPD Date: 21.07.2026
  • Source File: 2203535.pdf
  • Pages: 32
  • Description: Full technical guide for the Westinghouse DB-75.
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  • 2 TABLE OF CONTENTS Description Page PART - RECEIVING, HANDLING, AND STORING Inspection 6 Storing . . 7 PART I I - INSTALLATION Connect ions . . . . . . . . . . . . Pole Unit . . . . . . . . . Contacts . . . . . . . . Maintenance of Contacts Operating Mechanism . . . . Closing Solenoid Overcurrent Tripping Device 1. Construction . . . . PART II I -MAINTENANCE 2. Installation and Removal 3. OPeration . . . . . . . 4. Time current Characteristics 5. Adjustm
  • I. B. 35-240-1 Figure 1 2 3 4 5 LIST OF ILLUSTRATIONS DB-75 Outline and Mounting Dimensions Typical Wiring Diagrams . . . . . . . . . Cross-Sectional View of Type DB-75 Circuit Breaker Adjusting Limits of Main and Arcing contacts for DB-75 Circuit Breakers . . . . . . . . . . . . . Closing Solenoid - Construction Details 6 Cross-sectional View of Overcurrent Tripping Device with 7 8 Long Delay and Instantaneous elements Schematic and Typical Time-Current C
  • I. B. 35-240-1 www . ElectricalPartManuals . com
  • ' . 1 ' j j . I. B. 35-240-1 Westinghouse TYPE
  • PART I RECEIVING, HANDLING AND STORING Type OB-75 air circuit breakers, are shipped Inspect the breaker as fo II ows: in wooden crates with all attachments mounted in place. 1. Lift trip finger by hand to make sure that it does noç bind. IMPORTANT: To avoid damage to the break­ ers, DO NOT USE HOOKS in handling. Net weights of Type DB-75 are given in Table No. 1. TABLE NO. 1 NET WEIGIITS 2 POLE 3 POLE 400 lbs. 500 lbs. Immediately upon receipt, examine s
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I , • ' ·k·-: ·t · . ,\ .t · · l INSTRUCTIONS TYPE DB-75 "DE-ION'' Am CIRCUIT BREAKER 3000 AMPERE ' FRAME SIZE 600 Volts A-C 250 Volts D-C INTERRUPTING RATING 75,000 Amperes - 600 Volts A-C 100,000 Amperes - 250 Volts A-C November, 1956 I.B. 35-240-1 .. . ., • ... . ' I WESTINGHOUSE ELECTRIC CORPORATION . i̟ 11/ ···- ¥ ū: . :::;̠ ('\."' Ŭ;'·' " /·: Switchgear Division - East PittSburgh, Plant, - ' .eel: <:! ŕŖ-; East Pittsbu%gh;· la.;;;.. :, - -. ' Jil : Ji www . ElectricalPartManuals . com

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