SECTION 4: BASIC OPERATING INSTRUCTIONS
Page
4-1 Manual Circuit Breaker Operation ..........................................................................................29
4-1.1 Spring Charge Mechanism for Manually Operated Breakers ........................................29
4-2 Power Circuit Breaker Operation ...........................................................................................30
4-2.1 Spring Charge Mechanism for Power Operated Breakers ............................................31
4-2.2 Power Operation ...........................................................................................................35
4-3 Closing Mechanism ...............................................................................................................35
4-4 Opening (Tripping) Mechanism ..............................................................................................37
4-5 Mechanical Interlocking System Description .........................................................................40
4-5.1 Remove Position ...........................................................................................................40
4-5.2 Disconnect Position ......................................................................................................40
4-5.3 Test Position ..................................................................................................................40
4-5.4 Connect Position ...........................................................................................................42
4-5.5 Mechanical Interlocking System Operation...................................................................42
4-5.6 Spring Discharge Interlock ............................................................................................44
4-5.7 Connected Breaker Manual Close Interlock ..................................................................44
4-5.8 Electric Lockout Equipped Breaker ...............................................................................44
4-5.9 Closed Breaker Interlock ...............................................................................................44
4-5.10 Padlocking Provision ....................................................................................................46
4-6 DSLII Circuit Breaker and Fuse Truck .....................................................................................47
4-6.1 DSLII Current Limiters ..................................................................................................48
4-6.2 Blown Limiter Indicator .................................................................................................48
4-6.3 Fuse Truck .....................................................................................................................48
4-6.4 Fuse Truck Installation and Use .....................................................................................49
4-6.5 Fuse Replacement ........................................................................................................49
4-6.6 Blown Fuse Indicator ....................................................................................................49
SECTION 5: INSPECTION AND MAINTENANCE
5-1 General ..................................................................................................................................51
5-2 General Cleaning Recommendations ....................................................................................51
5-3 When to Inspect ....................................................................................................................51
5-4 What to Inspect .....................................................................................................................51
5-4.1 DSII-308 Through DSII-620 Inspection ..........................................................................52
5-4.2 DSII-632 and DSII-840/850 Inspection ..........................................................................52
5-4.3 DSII-308 Contact Replacement ....................................................................................52
5-4.4 DSII-516 Through DSII-840/850 Contact Replacement .................................................52
5-4.5 Arc Chutes ....................................................................................................................53
5-4.6 Power Operated Mechanism ........................................................................................54
5-5 Factory Adjustments ..............................................................................................................54
5-5.1 Trip Latch Overlap Adjustment ......................................................................................56
5-5.2 Breaker Open Position Stop Adjustment (DSII-632 Only) .............................................56
5-5.3 Moving Contact Adjustment .........................................................................................58
5-5.4 Levering Mechanism Adjustment .................................................................................58
5-6 Lubrication .............................................................................................................................59
5-6.1 Lubrication Frequency ...................................................................................................59
5-6.2 Lubrication Location ......................................................................................................59
SECTION 6: RENEwAL PARTS
6-1 General ..................................................................................................................................62
Effective July 2010
Instructional Book
IB694C694-03
Effective July 2010
4
eaton corporation
www.eaton.com
