5–20 Part Replacement Procedures
Publication 1336 IMPACT-6.2 – March 1998
2. Remove the following from the Ground Sense CT Bus Bars:
• L3 wire from DC Bus Inductor L1.
• L2 wire from DC Bus Inductor L1. Note that the positive (+)
and negative (–) DC wires from TB1 may remain connected to
the bus bars.
3. Remove the following from the Snubber Board:
• DC Bus Inductor wire L1 from SCR1 terminal C (–).
• DC Bus Inductor wire L4 from SCR1 terminal A (+).
• TB1 terminal wire R from SCR1 terminal 3.
• TB1 terminal wire S from SCR1 terminal 2.
• TB1 terminal wire T from SCR1 terminal 1.
4. Remove the nuts fastening the TB1 Mounting Plate to the drive to
remove the plate from the drive.
5. Pull the Bus Inductor straight out of the drive to remove the
inductor from the drive.
!
ATTENTION: Note the position of the bracket
toward the lower end of the inductor. The tab on the
bottom right of the inductor bracket fits into a hole on
the TB1 mounting plate. Correctly position the
replacement inductor brackets to prevent damage to the
equipment.
!
ATTENTION: Holes in the inductor bracket align
with pins located on the inside-back of the Main
Chassis. Correctly align the holes on the replacement
inductor bracket with the chassis pins to prevent
damage to the equipment.
Installation
1. Lower the inductor into the Main Chassis, aligning the hole in the
bottom inductor bracket with the peg on the chassis.
2. Install DC Bus Inductor L1 in reverse order of removal. Refer to
Table 3.A – Fastener Torque Specifications.
!
ATTENTION: Replace all guards and insulators
before applying power to the drive. Failure to replace
guards may result in death or serious injury.
AB Spares
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