10
Instructions for the installation and
2.2.2. Purchasable accessories not provided as standard
with Power Xpert IGX switchgear
The following tools and accessories are recommended for
installation and commissioning:
•
Insulating gas leak detector 81A8152H01
2.2.3. Responsibility of installer
The installer is responsible for preparing, terminating and connecting
all medium voltage power conductors and devices for Power
Xpert IGX switchgear. This includes incoming cables to transition
compartments, main bus conductors between shipping groups
or vertical sections, cable connections to cable connection tank
connectors and surge arresters (if furnished).
The installer is also responsible for inter-group control wiring and
external control wiring connections to incoming signal terminals.
Main bus conductor installation instructions are included in this
document. Instructions for terminating power cables and installing
the connectors into the Power Xpert IGX cable connection tank
inner cone type bushings must be furnished by the vendor whose
connectors the customer has chosen. Cables, once connected, must
be properly braced before any energization. For more information on
Power Xpert IGX cable bracing, contact Eaton Engineering Services.
2.3. Receiving
2.3.1. Storage, inspection and unpacking
If a Power Xpert IGX vertical section is not to be used immediately
but is to be placed in storage, maximum protection can be obtained
by keeping it packed as shipped. See
Section 2.6.
The vertical sections should have been shipped in their upright
position, as indicated on the shipping materials.
Open the packaging carefully to avoid any damage to the contents.
Use a nail puller rather than a crow bar when required. When
opening the containers, be careful to save any loose items or
hardware that may be otherwise discarded with the packing
material. Check the contents of each package against the packing
list.
Examine the Power Xpert IGX vertical section or shipping group
for any signs of shipping damage such as broken, missing or loose
hardware, damaged or deformed steel or other broken items. File
claims immediately with the carrier if damage or loss is detected
and notify the nearest Eaton office.
2.3.2. Sniff test for insulating gas
During the vertical section or shipping group installation process,
use a gas leak detector on each Power Xpert IGX shipping group or
vertical section to detect any leaking insulating gas. Detection of the
gas would require the immediate application of appropriate PPE and
investigation to determine the gas source.
Set the sniffer instrument to 4.4x10
-5
std. cm
3
/sec. How the
instrument signals the presence of gas will depend on the
instrument. The test Pass/Fail criteria are:
•
Pass: no gas is detected
•
Fail: gas is detected
Pass the sniffer probe close to any accessible Power Xpert IGX
phase pole sealing locations such as
•
cable connection cones
•
gas piping fittings
•
sealing plates
•
mechanism linkage or shaft penetrations
•
gas fill ports (the DN8 valves below the gas gauges) - see
Figure 5. Gas fill ports.
The insulating gas is heavier than air, so the sniffer should be passed
along the lowest areas of each enclosure near the base plate as an
additional precaution.
Upon uncrating the units, record all gas pressure gauge readings.
Compare those to the pressures during energization.
2.4. Handling
Power Xpert IGX vertical sections may be arranged in shipping
groups ranging from one to five vertical sections.
Walking on or placing heavy objects on the top of a shipping group
or vertical section should only be done with loads of less than 300
lb.
Depending on the shipping group size, use one of the following to
transport the vertical sections:
•
Crane
•
Fork lift
If using a crane, the rigging should be rated for lifting the Power
Xpert IGX shipping group.
Use a fork lift if Power Xpert IGX shipping groups have been shipped
on pallets. Care must be taken to move the shipping group on its
pallet, with the shipping group fully supported by the fork lift forks.
Partial support of the shipping group may result in tipping over.
Avoid the use of abrupt movements of the shipping groups, to avoid
equipment damage.
2.5. Rigging
The preferred method of handling all Power Xpert IGX switchgear
assemblies is by crane. Lifting points are provided at the top of each
shipping group. Insert a crane hook through each of the four points
to lift and move the shipping group.
shows example Power
Xpert IGX lifting angles using an overhead crane.
See
for the details of recommended lifting chain lengths for
shipping groups of 1 to 3 and 4 to 5 vertical sections.
Table 3. Recommended minimum chain lengths
Shipping group vertical sections
Lifting chain length SL
1-3 units
6 ft. min
4-5 units
8 ft. min
ote:
N
Lifting angle
A
is to be greater than or equal to 30 degrees.
