Rockwell Automation Publication 7000-UM202H-EN-P - November 2023 37
Chapter 2 Power Component Definition and Maintenance
Figure 29 - Simplified Wiring Diagram
Replacing Transient Suppression Network Fuses
Two sizes of fuses (5 kV, 7.2 kV) are available within the TSN located inside the
connection cabinet. The 18-pulse drive contains three TSNs.
1. Ensure there is no power to the equipment.
2. Fuses are held in a place with a fuse clip. To remove the fuse pull firmly.
3. To replace the fuse, hold it in position and push firmly until the fuse is
seated within the fuse clip. Install fuses so that the rating is visible.
IMPORTANT Rockwell Automation selects the fuses sent with the transient
suppression network based on their characteristics (including
internal resistance) for optimum MOV performance and
protection. Do not substitute other fuses without contacting the
factory first.
IMPORTANT Voltage sensing occurs after the MOV fuse and will detect open
fuses in the drive control as a master or slave undervoltage or
unbalance.
ATTENTION: To prevent electrical shock, disconnect the main power
before working on the drive. Verify that all circuits are voltage-free
using a hot stick or appropriate voltage-measuring device. Failure to
do so may result in injury or death.
IMPORTANT Replace the fuse with another of the same rating. See Figure 30
on page 38 for location.
Drive Input Power from Line Terminals
Transient Suppression Network
Medium Voltage Input Fuses
Phase MOV Suppressor
Ground MOV Suppressor
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