Eaton Cutler-Hammer DS-420

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Page 82

1.8. 33-790-11

Memorandum

Effective October 1998

Courtesy of NationalSwitchgear.com

Main Page

Table of Contents2
Introduction10
Type DS Breaker Ratings10
General Description11
- Basic Breaker Assembly11
- Arc Chutes11
- Optional Components11
- Accessories11
DSL Breakers - Current Limiting Type Breakers and Combinations11
- Special Circuit Breakers: DS-206S and DS-416S12
Safety Features13
Recommended Safety Practices14
Section 1 -Receiving, Handling and Storing15
Receiving and Handling15
Storing15
Weights: Circuit Breakers and Fuse Trucks15
Approximate Weights15
Section 2 -First Removal of Breaker from Compartment16
General16
Setting the Rails in Front of the Compartment16
Removing Shipping Brace16
- The Type DS Low Voltage Power Circuit Breaker Is Shipped Inside Its Own Compartment16
Lifting the Breaker17
- Levering Device Crank Handle Installed17
- Use of Breaker Lifting Adapter17
Section 3 -Preliminary Examination of Circuit Breaker18
General18
- View Showing Controls on the Panel18
  - Left Side of Breaker with Levering Device Arm in REMOVE Position19
  - DS 416 Breaker with Front Panel Removed19
- Right Side Showing Levering Device Arm in TEST Position19
- Rear View Showing Levering Device Arm in CONNECT Position19
Independent Manual and Power-Operated Breakers20
Closing Facilities20
Tripping Facilities20
Levering Device20
Section 4 -Basic Operating Instructions21
General21
Levering Device21
Charge the Closing Springs21
- Method Used to Press Trip Plate and Lower Shutter with One Hand, Preparatory to Inserting Crank21
Close the Breaker22
Open the Breaker22
Place the Breaker in the Test Position23
Place the Breaker in the Connect Position23
Remove the Breaker for Final Inspection23
Final Inspection23
Amptector Trip Settings23
Place the Breaker in Service23
Rear of Power-Operated Mechanism24
Section 5 -Description and Explanation of Operation24
General24
The Operating Mechanism and How It Works24
Rear View of Mechanism (Left Close Spring Removed)25
Power-Operated Mechanism25
Explanation of Spring-Charging Mechanism for Power-Operated Breakers25
Power Operation26
Front View Showing Major Parts of the Crank Shaft Assembly27
Power-Operated Spring-Charge Details28
Crank Shaft Assembly of Power-Operated Mechanism29
Emergency Spring-Charge on Power Operated Mechanism29
Standard Schematic and Connection Diagrams for Power-Operated Breakers30
Spring-Charging Mechanism on Manual Operated Breakers32
Manual-Operated Mechanisms32
Explanation of Spring-Charging Mechanism for Manually-Operated Breakers32
These Sketches Show the Four Basic Positions of Breaker and Linkage with Enlarged View of Trip Shaft and Latch33
Shunt Trip Details Showing Trip Shaft Adjustment34
Circuit Breaker Closing Mechanism34
Circuit Breaker Tripping or Opening Mechanism35
Miscellaneous Details36
DS-632 Breaker with Front Panel Removed36
Front View Showing Close Bar Guard37
Rear View Showing the Seismic Positioner37
- Mechanical Interlocking, Description and Explanation of Operation38
Drawout Unit Position Indicator38
The REMOVE Position39
The DISCONNECT Position39
The TEST Position39
The CONNECT Position40
- Detailed Explanation of Mechanical Interlock System40
Spring Discharge Interlock41
Relation of Shutter, Trip Plate, and Trip Shaft41
Relation of Shutter, Interlock Cam and Levering Device Arms42
Connected Breaker Manual Close Interlock43
Close-Release Interlock to Discharge Springs on Levering out of Compartment and Conn. Position no Manual Close Interlock43
Breaker Equipped for Electric Lockout44
Closed Breaker Interlock45
Padlocking Provision45
Padlock Device - Locked Trip Free and Shutter Raised45
Section 6 -Circuit Breaker Pole Units, Description and Operation46
General46
Moving Contact Sub-Assemblies46
Three-Pole Assembly of DS-206 Pole Units on Frame47
Three-Pole Assembly of DS-416 and DS-420 Pole Units on Frame47
Stationary Contact Sub-Assemblies48
Three-Pole Assembly of DS-632 Pole Units on Frame48
Three Pole Assembly of DS-840 Pole Units on Frame49
Type DS-206 Pole Unit Assembly - Front View50
Type DS-420 Pole Unit Assembly - Front View52
Type DS-420 Pole Unit Assembly - Rear View52
Type DS-632 Pole Unit Assembly - Front View53
Type DS-632 Pole Unit Assembly - Rear View53
Type DS-840 Pole Unit Assembly - Front View53
Type DS-840 Pole Unit Assembly - Rear View53
Moving and Stationary Contact Details DS-41655
Moving Contact Details DS-63257
Moving Contact Details DS-84059
Breaker with Barrier Removed to Show Mounting of Arc Chutes61
DS-206 Arc Chute with Details61
DS-632 Arc Chute with Details61
Section 7 -Arc Chute61
General61
DS-840 Arc Chute with Details62
Schematic Illustration of Tripping System63
Section 8 -Circuit Breaker Automatic Tripping System63
General63
The Amptector II-A Trip Unit64
Optional Amptector I-A Solid-State Trip Unit65
The Amptector I-A Trip Unit65
Amptector I-A Trip Unit with Front Cover Removed66
- Ground Fault Protection69
Making Current Release (Discriminator)69
Servicing of Amptector Trip Unit70
Actuator70
Sensors70
DS-840 Breaker with Front Panel Removed71
DS-840 Breaker Rear View Showing Sensors71
- Undervoltage Trip Attachment72
- Overcurrent Trip Switch72
Optional Accessories71
Frame Size and Sensor Ratings71
Undervoltage Trip Device72
Undervoltage Trip Device Operation72
- High Load Switch (Available with Amptector I-A Only)73
Overcurrent Trip Switch73
High Load Switch73
- Latch Check Switch74
- Auxiliary Switches74
Trip Actuator74
Latch Check Switch Operation74
Auxiliary Switch Construction Details74
- Amptector Trip Unit Test Kit75
General75
Description75
Operation75
Test Kit in Operation76
DSL-206 Breaker Side View77
Sensor and Limiter Ratings77
Section 9 -DSL Circuit Breakers and Fuse Trucks77
General77
DSL Current Limiters77
Blown Limiter Indicator77
DSL-206 Breaker Front View (DSL-416 Similar)78
DSL-416 Breaker Side View78
- Replacing Fuses79
- Blown Fuse Indicator79
Fuse Trucks78
- Installing Fuse Trucks78
Blown Limiter Indicator79
DS-3200 Fuse Truck Front View79
DS-3200 Fuse Truck with Front Cover Removed80
Section 10 -Fixed Breakers81
General81
Section 11 -Drawout Dummy Elements81
Section 12 -Inspection and Maintenance82
General82
Contacts and Their Adjustment, DS-206 Breaker82
When to Inspect83
Contacts and Their Adjustment, DS-632 Breaker84
Whatto Inspect84
Contacts and Their Adjustment, DS-840 Breaker85
DS-206, DS-206S, DS-416, DS-416S and DS-42085
Open Position Stop and Anti-Rebound Latch86
DS-632 and DS-84086
Replacement of Contacts86
Ds-20686
DS-416, DS-416S, DS-420, DS-632 and DS-84086
Arc Chutes86
General Inspection86
Power Operated Mechanisms86
Levering Mechanism87
Factory Adjustments87
Lubrication Points on Left Side of Mechanism88
Trip Latch Overlap88
Breaker Open Position Stop (DS-632 Only)88
Moving Contact Adjustment88
Levering Mechanism88
Lubrication Points on Right Side of Mechanism89
Lubrication89
Frequency89
Location and Lubricant89
Section 13 -Renewal Parts90
General90
Identifying Parts for DS-416S and DS-206S90
DS-416S Parts90
DS-206S Parts90

Eaton Cutler-Hammer DS-420 - Page 91

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