3 
List of Illustrations 
 
Figure Page 
 
1  Front view of PowerVac
®
 breaker with front cover....................  6 
2  Rating interference plate...........................................................  6 
3  Front view of PowerVac breaker without front cover................  8 
4  Manual charging........................................................................  9 
5  Gag plate installation.................................................................10 
6  Operating rod assembly............................................................10 
7 Contact gap...............................................................................11 
8  Close coil plunger gap...............................................................12 
9  Trip coil plunger gap..................................................................12 
10 Control switches .......................................................................13 
11  Sample operating speed graphs................................................19 
12  Contact gap adjustment ............................................................20 
13  Spring discharge interlock .........................................................24 
14  Toggle linkage positions of the ML-18 mechanism...................25 
15  Schematic of ML-18 mechanism...............................................27 
16  Typical wiring diagram for ML-18 mechanism...........................29 
17 PowerVac
®
 breaker left-front view ............................................30 
18 PowerVac
®
 breaker right-rear view............................................30 
19  Trip coil and linkage...................................................................31 
20  Close coil linkage.......................................................................32 
21  Bottom view of the ML-18 mechanism.....................................33 
22 Negative interlock .....................................................................34 
23  Wipe spring compression..........................................................34 
 
 
Table Page 
 
1  Control Device and Voltage..................................................... 18 
2 Measurements .......................................................................35 
3 Adjustments............................................................................35 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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  REPRODUCTION IN WHOLE OR IN PART IS NOT PERMITTED WITHOUT THE EXPRESS PERMISSION OF GENERAL ELECTRIC.