Eaton Cutler-Hammer DSII Series - Page 12

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Figure 1-3 Type DSLI/ Breaker with Integral Current

Limiters

l.B.

694C694-02

Figure 1-4

DSll

Breaker Shown on Compartment's

Captive Extension Rails

Effective

/97

Courtesy of NationalSwitchgear.com

Main Page

Table of Contents4
Section 1: Introduction Page9
General Lnformation9
Type DSLI I (Limiter) Circuit Breaker9
Safety Features10
Safety Practices10
Qualified Personnel11
Other Publications and Documentation11
Section 2: Receiving, Handling and Installation13
General Lnformation13
Unpacking Circuit Breaker13
- 2-2.1 Storing Circuit Breaker13
Lifting Circuit Breaker13
Breaker Inspection14
Levering Circuit Breaker15
Drawout Dummy Element16
Fixed Circuit Breaker16
Section 3: Equipment Description17
Type Dsll Circuit Breaker17
Basic Breaker Assembly19
Pole Units19
- 3-4.1 Primary Moving Contact Assembly19
- 3-4.2 Primary Stationary Contact Assembly20
Lnterphase Barriers20
ION Arc Chutes (Interrupter Assemblies)22
Electronic Tripping System22
- 3-7.1 Electronic Trip Unit24
- 3-7.2 Sensors24
- 3-7.3 Trip Actuator24
Operating Mechanism25
- 3-8.1 Manually Operated Circuit Breaker25
- 3-8.2 Power Operated Circuit Breaker26
Movable Primary and Secondary Contacts26
O Standard and Optional Devices27
- 3-10.1 Motor Cut-Off Switch (LS)27
- 3-10.2 Spring Release Device (SRO)27
- 3-10.3 Anti-Pump Relay (Y)27
- 3-10.4 Shunt Trip Attachment {Sta27
- 3-10.5 Latch Check Switch28
- 3-10.6 Auxiliary Switch28
- Undervoltage Trip Attachment (UVT A)28
- 3-10.8 Overcurrent Trip Switch29
Miscellaneous Details29
- 3-11.1 Interference Lnterlock29
- 3-11.2 Ground Contact30
- 3-11.3 Close Bar Guard30
- 3-11.4 Operation Counter30
Section 4: Basic Operating Instructions Page31
Manual Circuit Breaker Operation31
- 4-1.1 Spring Charge Mechanism for Manually Operated Breakers31
Power Circuit Breaker Operation32
- 4-2.1 Spring Charge Mechanism for Power Operated Breakers33
- 4-2.2 Power Operation37
Closing Mechanism37
Opening (Tripping) Mechanism39
Mechanical Interlocking System Description42
- 4-5.1 Remove Position42
- 4-5.2 Disconnect Position42
- 4-5.3 Test Position42
- Connect Position44
- Mechanical Interlocking System Operation44
- 4-5.6 Spring Discharge Interlock46
- 4-5.7 Connected Breaker Manual Close Lnterlock46
- 4-5.8 Electric Lockout Equipped Breaker46
- 4-5.9 Closed Breaker Interlock46
- 4-5.10 Padlocking Provision48
Dslll Circuit Breaker and Fuse Truck49
- 4-6.1 Dslll Current Limiters50
- 4-6.2 Blown Limiter Indicator50
- 4-6.3 Fuse Truck50
- 4-6.4 Fuse Truck Installation and Use51
- 4-6.5 Fuse Replacement51
- 4-6.6 Blown Fuse Indicator51
Section 5: Inspection and Maintenance53
General53
General Cleaning Recommendations53
When to Inspect53
What to Inspect53
- 5-4.1 Dsll-308 through Dsll-620 Inspection54
- 5-4.2 Dsll-632 and Dsll-840/850 Lnspection54
- 5-4.3 Dsll-308 Contact Replacement54
- 5-4.4 Dsll-516 through Dsll-840/850 Contact Replacement54
- 5-4.5 Arc Chutes55
- 5-4.6 Power Operated Mechanism56
Factory Adjustments56
- 5-5.1 Trip Latch Overlap Adjustment58
- 5-5.2 Breaker Open Position Stop Adjustment (Dsll-632 Only)58
- 5-5.3 Moving Contact Adjustment60
- 5-5.4 Levering Mechanism Adjustment60
Lubrication61
- 5-6.1 Lubrication Frequency61
- 5-6.2 Lubrication Location61

Eaton Cutler-Hammer DSII Series - Page 12

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