61
Instruction Booklet
IB022018EN
Effective July 2020
Instructions for the installation and
EATON
www.eaton.com
Fasten the front 3-phase CT support angle to the studs on the
horizontal tank surface, then install the front CT bracket over the
threaded rods. Note that each front bracket should have a protective
edge grommet installed around the inner diameter of the center
hole. Use the M10 mounting hardware to secure. Ensure that all
associated hardware is torqued to the appropriate specification for
the respective thread size required to properly compress the locking
washers.
Bundle the CT signal wires as they are routed rearward away from
each CT. Secure them to the upper or lower lateral flange of the rear
mounting plate and route them to the right-hand cable compartment
wall, downward toward the base, then forward along the tank wall
into the vertical LV wire way, through a grommet and up into the LV
compartment.
Figure 106. 2000 A / 2500 A cable CT assembly
Figure 107.
Change spacer length to accommodate
various CT configurations
2000 A / 2500 A cable CT bracket with rear bracket,
spacers, and front bracket.
5.13.4 Un-installing CTs on main bus or cable side
applications
m
DANGER
ALL ASSOCIATED APPARATUS MUST BE DE-ENERGIZED DURING ANY
HANDS-ON INSTALLATION OR MAINTENANCE. FAILURE TO COMPLY WILL
RESULT IN DEATH, SEVERE PERSONAL INJURY AND EQUIPMENT DAMAGE.
Un-installing CTs is the reverse of installing them.
m
WARNING
TAKE CARE THAT ALL ELECTRICAL EQUIPMENT ASSOCIATED
WITH THE SWITCHGEAR IS DE-ENERGIZED BEFORE WORKING
ON THE EQUIPMEN
T.
DISCONNECTING A CT SECONDARY SIGNAL CONNECTOR
WHILE THE BUSBAR IS CONDUCTING CURRENT WILL RESULT
IN A HIGH VOLTAGE ON THE SECONDARY WINDING, DAMAG-
ING EQUIPMENT AND POSSIBLY INJURING PERSONNEL.
5.13.4.1 Un-installing main bus or bus tie CTs
This procedure applies to each phase bus connection.
1. Confirm that all power to the lineup is de-energized and locked
out per the plant lockout/tagout procedures.
2. Disconnect the CT signal cable(s) to the CT secondary signal
connectors.
3. Detach the CT(s) from its (their) bracket.
4. Move the CT(s) away from its (their) bracket by sliding it (them
along the SSIS busbar.
5. Disconnect and dismount the busbar bus joints from their
connection cones so that the bus joints, busbar and CTs can be
removed from the main bus compartment.
6. Remove the busbar from one of its bus joints.
7. Slide the CT off of the busbar at the busbar decoupled end.
5.13.4.2 Un-installing cable side cable connection CTs
This procedure addresses one phase at a time.
Refer to
It shows that the CT bracket attaches to the tank
on two faces, the rear vertical face and the horizontal face. On the
rear vertical face, horizontal studs extend to attach the bracket. On
the horizontal face, the attachment studs are vertical.
1. Confirm that the switchgear is de-energized before performing
any un-installing activities.
2. Disconnect and remove the cable tee connectors from the
phase bushings.
3. Disconnect the CT secondary signal wiring from the CT
connectors.
4. Brace the CT bracket so that it will not move while mounting
hardware is loosened and removed.
5. Loosen and remove the fastening hardware (nuts and lock
washers) from the front CT mounting bracket assembly.
6. Lower the front CT bracket assembly off of the vertical
mounting posts.
7. Taking care not to scrape the connection bushings, slide each
CT away from the tank rear face and off of the connection
bushings.
