Powell 27PV25ASD, Manual

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PowlVac® ASD 27kV & 38kV Vacuum Circuit Breaker
IB-65100
Figures
Tables
Table A Field Dielectric Test Values ..........................................................................................................25
Table B Lubrication ..................................................................................................................................36
Table C Timing ..........................................................................................................................................46
Table D Primary Resistance .....................................................................................................................46
Table E Primary Current Path ..................................................................................................................51
Table F Control Devices ............................................................................................................................52
Table G Miscellaneous Parts ....................................................................................................................54
Figure 1 Front View of PowlVac® ASD Circuit Breaker with Cover ....................................................7
Figure 2 Rear View of PowlVac® ASD Circuit Breaker ........................................................................8
Figure 3 PowlVac® ASD Circuit Breaker Compartment .....................................................................9
Figure 4 Operating Pushrod Assembly of PowlVac® 38kV ASD Circuit Breaker .............................10
Figure 5 Ground Connection of PowlVac® ASD 38kV Circuit Breaker ............................................10
Figure 6 Front View of PowlVac® ASD Circuit Breaker without Cover ............................................12
Figure 7 Close-Up Front View of PowlVac® ASD Circuit Breaker Mechanism .................................13
Figure 8 Cam and Fundamental Linkage Positions ........................................................................14
Figure 9 Mechanical and Trip Linkages ...........................................................................................15
Figure 10 Typical Control Scheme .....................................................................................................18
Figure 11 Test Plug Jumper Interlock ................................................................................................20
Figure 12 Secondary Disconnect Receptacle and Secondary Disconnect Device Completed .........20
Figure 13 Lifting the Circuit Breaker by Crane ..................................................................................23
Figure 14 Push to Trip Knob & Racking Access Door .........................................................................28
Figure 15 Racking Indicator Flags & Racking Handle .......................................................................28
Figure 16 Lubrication ........................................................................................................................34
Figure 17 Lubrication (cont) ..............................................................................................................35
Figure 18 Main Closing Spring AssemblyCompressed for Removal .................................................37
Figure 19 Main Closing Spring AssemblyInstalled ...........................................................................37
Figure 20 Primary & Secondary Trip Prop Adjustment .....................................................................39
Figure 21 Feeler Gauge ......................................................................................................................40
Figure 22 Trip Armature Assembly Left View ....................................................................................41
Figure 23 Trip Armature Assembly Right View .................................................................................42
Figure 24 Circuit Breaker Trip Roller .................................................................................................42
Figure 25 Latch Check Switch Adjustment ........................................................................................43
Figure 26 Vacuum Interrupter Assembly Drawing (38kV, 1200A) ....................................................50
Figure 27 Primary Current Path ........................................................................................................51
Figure 28 Control Devices ..................................................................................................................53