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Instructions for the installation and
commissioning of Power Xpert IGX
medium-voltage switchgear
Section 4: Installation
• WARNING
BEFORE PLACING THE POWER XPERT IGX SWITCHGEAR IN SERVICE,
CAREFULLY FOLLOW THE INSTALLATION PROCEDURE GIVEN BELOW. NOT
FOLLOWING THE PROCEDURE CAN FAIL TO UNCOVER SHIPPING DAMAGE
THAT MAY RESULT IN INCORRECT UNIT OPERATION LEADING TO DEATH,
BODILY INJURY, AND EQUIPMENT DAMAGE.
Before installing Power Xpert IGX, a careful check should be made to
ensure that all packaging materials have been removed.
N
ote:
To ensure a satisfactory installation sequence and quality, Power Xpert
IGX switchgear vertical sections' installation should be performed under
the supervision of trained and qualified field engineers.
4.1. Qualified personnel
• WARNING
IMPROPERLY INSTALLING OR MAINTAINING THESE PRODUCTS CAN
RESULT IN DEATH, SERIOUS PERSONAL INJURY, OR PROPERTY DAMAGE.
READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE ATTEMPTING
ANY UNPACKING, ASSEMBLY, OPERATION OR MAINTENANCE OF THE
EQUIPMENT.
INSTALLATION OR MAINTENANCE SHOULD BE ATTEMPTED ONLY
BY QUALIFIED PERSONNEL. THIS INSTRUCTION BOOK SHOULD NOT
BE CONSIDERED ALL INCLUSIVE REGARDING INSTALLATION OR
MAINTENANCE PROCEDURES. IF FURTHER INFORMATION IS REQUIRED,
YOU SHOULD CONTACT EATON.
4.2. Tool and hardware requirements
Metric tools and hardware are required for this installation.
4.3. Initial inspection before setting in place
Power Xpert IGX vertical sections will arrive in shipping groups
of one or more sections. Shipping group vertical sections will be
electrically and mechanically connected, so that only attachments
and connections between shipping groups will be necessary during
installation.
See sections 4.7. Anchoring shipping groups to the foundation
and 4.10. Bolting adjacent shipping groups for details on
placement and attachment of shipping groups. As each shipping
group is attached to the previously-installed group, it will require
electrical connection to the group main bus links and ground bus.
See section 4.8. Installing main bus and coupling the units for
details on connecting main bus links to adjacent shipping groups.
Once a vertical section or shipping is in place, record the tank
N
ote:
gas pressure gauge readings on each switchgear unit. This will
be compared with gas pressure readings prior to energization to
determine if any gas leaks have occurred.
Electrical and mechanical checks
Each vertical section will have a 3PS Mech and/or VT 3PS Mech
manual operation panel on the front of the enclosure. This panel
will have either one switch control (3PS Mech only) or two switch
controls (when both 3PS Mech and VT 3PS Mech are supplied). The
Three Position Switch (3PS) should be checked both mechanically
and electrically. The Voltage Transformer Three Position Switch (VT
3PS) does not have a motor and will only be checked mechanically.
Mechanical checks
The 3PS Mech and VT 3PS Mech (if furnished) control(s) should
show their switches in the grounded positions when received. See
Figure 11.
Interlocking
The 3PS Mech and circuit breaker are interlocked to prevent
inappropriate operation. Refer to the project schematics and 3PS
Mech controller program for details. In summary,
The 3PS Mech cannot operate, either electrically or
•
mechanically, if the CB is closed.
The 3PS Mech manual operation blocking plates cannot be
•
opened if the CB is closed.
The 3PS Mech cannot be electrically operated while the
•
Manual Operation T-Handle is inserted in either port.
A solenoid prevents 3PS Mech manual operations if control
•
power is absent.
The CB cannot be electrically operated while the manual
•
operation T-Handle is inserted in either port.
The CB (if open) cannot be closed if either 3PS Mech manual
•
operation blocking plate is open.
4.3.1. 3PS Mech manual operation
Under normal circumstances, a 3PS is operated electrically, with
local or remote operator devices controlling an electric motor drive.
If the electric drive is not available, a manual, mechanical means
for operating the 3PS can be used. The following describes these
mechanical features and their use.
Local permissive/control devices
The 3PS Mech Manual Operation Module has devices that
mechanically permit or prohibit operation of the 3PS Mech (see
Figure 11). These devices are Keylock/Padlock plungers for
Lock Connect (standard)
•
Lock Ground (standard)
•
These devices mechanically set conditions for the 3PS, for both
electrical and manual operation. When a Keylock/Padlock plunger
is depressed into the manual control module and locked in place
either with its keylock or a padlock inserted through the plunger and
bracket holes, it sets the operating mode for the 3PS: Switch Locked
Connect, Switch Prevented from connecting to the circuit breaker,
Ground Switch Locked grounded, or Ground Switch prevented from
connecting to ground.
The 3PS and VT 3PS require control power to operate.
The 3PS Mech and VT 3PS Mech (if furnished) can be operated
manually using the appropriate switch mechanism mounted on the
front of the vertical section. Each switch has three operating states:
Connect, Disconnect and Ground.
Performing manual operations requires two tools:
Manual Operation T-Handle (Figure 12)
•
Access Selector Key (Figure 13)
•
Instruction Booklet
IB022023EN
Effective April 2023
Revision #2
Prevent Connect (optional)
•
Prevent Ground (optional)
•
EATON www.eaton.com/IGX
17
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