27
17. REASSEMBLE
AFTER CHECKING FOR ANY PARTS OR TOOLS LEFT IN THE
BREAKER, BEGIN REASSEMBLING. REMOUNT THE BOX, FLOATING
TRIM AND FACEPLATE. BEFORE FULLY TIGHTENING THE FACEPLATE
SCREWS CHECK THAT THE INDICATORS AND VARIOUS OPERATING
BUTTONS MOVE FREELY. IF THE BREAKER IS EQUIPPED WITH A DOOR
INTERLOCK, BE SURE THAT THE OPERATING LEVER INSIDE THE BOX IS
POSITIONED IN FRONT OF THE OPERATING PIN ON THE MANUAL TRIP
BUTTON AND CHECK ITS OPERATION AFTER THE BOX IS MOUNTED.
RE-INSTALL THE LOWER FLASH SHIELD, THE INTERPHASE
BARRIERS, END BARRIERS (IF REMOVED) AND FRONT FLASH SHIELD.
FINALLY, MOUNT THE ARC CHUTES. THE MOUNTING BOLTS FOR THE
ARC CHUTES AND LOWER FLASH SHIELDS SHOULD NOT BE TORQUED
BEYOND 50 INCH POUNDS. TAKE CARE THAT THE ARC CHUTES ARE
PROPERLY SEATED IN THE UPPER BASE MOULDING.
18. CLEAN CRADLE MOULDINGS AND CONTACTS
FOR DRAWOUT BREAKERS, THE CRADLE SHOULD BE CLEANED
AND INSPECTED AT THIS TIME IF POSSIBLE. THIS SHOULD ONLY BE
CARRIED OUT IF ALL POWER, MAIN AND CONTROL, HAS BEEN
DISCONNECTED.
WIPE THE MOULDINGS OF THE MAIN POWER STABS. REMOVE
GREASE FROM THE MAIN STAB, SECONDARY DRAWOUT CONTACTS
AND GROUND STAB.
19. INSPECT CRADLE
CHECK ALL MOLDINGS FOR DAMAGE AND THE MAIN STABS FOR
EXCESSIVE WEAR, SCORING OR PITTING. CHECK THE SECONDARY
CONTACT FOR DAMACE AND CHECK THE SECURITY OF THE WIRING.
CLEAN OUT THE BOTTOM OF THE CRADLE. IF A SHUTTER IS
INSTALLED, CHECK IT FOR FREEDOM OF OPERATION.
20. CRADLE LUBRICATION
APPLY A LIGHT WIPE OF GREASE TO THE MAIN STABS, THE
SECONDARY CONTACTS AND THE GROUND STAB. OIL PIVOT POINTS
OF THE SHUTTER MECHANISM, IF PRESENT.
21.
PLACE BREAKER BACK IN SERVICE.
FIG. 7.3.15.5, DEFLECTION ADJUSTMENT.
1.
3/8- 1 6 HEX BOLT
2.
SHIM
16. CHECK AND OPERATE CONTROL AND TRIP DEVICES
CHECK THAT ALL HARDWARE AND RETAINERS ARE SECURE
THROUGHOUT THE OPERATING MECHANISM. IN PARTICULAR CHECK
THE MOUNTING SCREWS OF SHUNT TRIP COILS, THE CLOSING COIL,
UNDERVOLTAGE TRIP OR ANY OTHER DEVICE WHICH MOUNTS ON
THE CHARGING OR CLOSING MECHANISMS.
MANUALLY OPERATE THE CLOSE COIL, TRIP COIL AND ANTI-
SINGLE- PHASE, DOOR INTERLOCK, KEY INTERLOCK AND MECHANIC
INTERLOCK TO CHECK FOR FREEDOM OF MOVEMENT AND PROPER
OPERATION.
FIG. 7.3.15.4, DEFLECTION READING IN CLOSING POSITION
