1 scope
This technology is applicable to general
industrial and civil building electrical installation engineering 10 (6) kV
oil-paper insulated cable connector card.
2 construction preparation
2.1 equipment and materials requirements:
2.1.1 cable connector housing must be
sealed well, no impurity and sand holes, inner wall is smooth, clean, model
specifications must meet the design requirements. Lead casing with pure lead
content of not less than 99.9%, and able to withstand 25 standard atmospheric
pressure test.
2.1.2 insulation materials must conform to
the voltage level and should have test data and factory certificate (form 2-6).
2.1.3 cable compound applied styling
products, factory and chemical and electrical performance test certificate.
2.2 the main tools:
2.2.1 production machinery: Windbreak
fences (open operations), plastic sheeting, oil pressure wiring pliers,
blowtorches, iron pot, enamel plates, aluminum pots, aluminum pots, aluminum
spoons, funnels, colanders, scissors, gloves, hacksaw, file.
2.2.2 testing tool: insulating shake table,
steel ruler, thermometer and test instruments, and so on.
2.3 operating conditions:
2.3.1 an outdoor cable head should choose a
sunny windless weather construction, therefore before making wires should pay
attention to local weather forecast, its environmental temperature + 5 ° c or
more. Humidity should not be greater than 70%.
2.3.2 making cable connectors around the
construction site shall be kept clean and dry. Good Windbreak fence on all
sides.
2.3.3 cable production should be operated
by specially trained qualified personnel.
2.3.4 construction site should meet the
prescribed safety, fire, flammable for safe keeping.
2.3.5 construction site should be equipped
with 220V power supply and safe power supply.
3 operational processes
3.1 process:
Construction preparation – shake test
of equipment point checking and calibration → dimensions-tidal
stripping cable insulation and cable cover →
Lead casing into dismantling the tripod and
exclude moisture →
→ → wrapped
insulation removed temporary gauze → sealing →
Pouring insulation adhesive cement box
planted → standard →
→ anticorrosion and installation commissioning inspection
3.2 cable joints made according to the
following procedure for, starting from strip-cut to the completed, must be
carried out continuously, at once, so as not to damp.
3.3 equipment inspection and preparation:
3.3.1 opening checking and construction of
joint inspection units, delivery units and construction units, and completes
the record.
3.3.2 lead wire connector casing should be
based on technical information or instructions, accessories and injury-free.
3.3.3 casing wall lead clean, beating with
wooden clappers at one end to form the necking (shall be made into the cable
slightly larger point) with a knife out of the vent and the injection hole and
cover with wrap.
3.3.4 processed black insulation tape and
gauze tape small volumes, soaking in a cable 150 ℃ to surge in oil
(such as no cable available transformer oil to join 25%~30% Rosin with
different), and then pull out, leaking oil for later use.
3.4 roll cable insulation measurement and
calibration of moisture:
3.4.1 the cable head shake table 2500V
opening shake test, insulation resistance after passing tide.
3.4.2 since the end of the cable the next
100mm, cables, turnkey and tear off a few of the core paper insulated, put
about 150 ℃ in cable oil, such as tidal oil will be suffused with bubbles and
make a hissing sound (Figure 2-19).
Another method for burning method. Will be
that the tide of insulated paper in fire, such as moisture, insulation paper
surface will bubble up and the hissing sound.
Such as when he found the cable insulation
with moisture should be removed piece by piece, until no moisture is obtained.
3.5 determination of dimensional stripped
cable cover:
3.5.1 straighten cable: cable to flat,
straightened within two metres of the cable ends, clean overlap 200mm. In the
Middle center line for the Joint Center. Saw blade disconnect (see Figure
2-20), and then cement protection box below the base plate in the centre line.
3.5.2 cable socket according to figure the
proper dimensions. Bandwidth-two-thirds clamp-solid steel (or 2mm turns of bare
copper wire lashing three), peel off layer (or sheath). Volume 50mm from the
layer break and strip Kaku, used a hacksaw and close to the edge of the clamp
saw a ring of dark marks and a depth not exceeding one-second of steel belt
thickness, then use the screwdriver to pry the steel tip, and then clamp with
pliers, tear strips, blank repairs steel burrs to make it smooth (Figure 2-21).
3.6 set into the lead casing:
3.6.1 Strip after Strip, uniform baking
using a blowtorch, get rid of the lead Pack on the asphalt paper, wipe clean
with a cotton-lead package. Korean paper wrapped on the cable end, and lead
into the casing.
3.6.2 stripping lead. According to the
dimensions shown in Figure 2-21 and stripping lead. How to: in the lead pack
with electrical forces carved a ring-shaped gouges, its depth not more than
half the thickness of the lead Pack. Then use the electric knife from the
circular trace to the end by two parallel gouges, 10MM space between two deep
scars, which will lead from the end torn off with pliers (Figure 2-21),
finally, lead Strip.
3.6.3 expanded lead. Expanding lead with
Shun turnkey paper-wound direction of expansion lead to lead expansion into
45-degree angle, Bell, Bell no burrs to smooth and symmetrical.
3.6.4 stripping turnkey paper trumpet
turnkey insulation on the edge of a piece of paper in oil-impregnated gauze
wrapped 25mm wide five-storey, the last trumpet 5mm as the temporary layer.
Then strip turnkey insulation paper and packing (not to damage wire insulation
paper) and cables along with the half overlap core insulation paper covered
with a layer of oil-impregnated gauze, distance from end of the connecting pipe
length of one-second and 5mm.
3.6.5 install triangular wooden frame.
Frame outside end from Bell 110~120mm with oil-impregnated gauze tie, and then
bent into a three-core work, the gap width 50mm, to bend shall not be bent hurt
paper insulation (Figure 2-22).
3.6.6 proof of lead, saw alignment cable
core. Expanded lead Bell to the end by PB one-second 35mm reduction of the
length of the casing (welding reduction 25mm), saw off the excess wire.
3.6.7 series took over. Length measured
from the end three-core connecting one-second and 10MM remove the insulation
paper (last two papers use hands torn off, so as not to damage the wire),
gasoline cotton wipe clean and connecting wires, wire and pipe fasten and
remove burrs.
3.7 demolition triangle frame and excluded
moisture demolition triangle frame and the the core line Shang of oil dip with,
tore to phase color paper, with cotton dip alcohol put core line wipe NET, then
with prior heating to 150 ℃ cable oil from ends asked Center for to tide processing (from cable
of Commission package at to Center to tide), then in Middle head following Pu
good rubber cloth.
3.8 winding insulation. In the core line
Shang with oil dip black paint across with along core line insulation paper
winding of direction, to half overlap method package wrapped around insulation,
and package flat even took over ends of space, full length package wrapped
around 3 layer, then in took over and the took over to ends extends, package
thickened insulation, thickened paragraph ends should package into tapered, the
Department size see table 2-7, package wrapped around Shi must layer Layer
package tight Kanehira, each package three layer coated once Silicon oil.
Increased core winding insulation dimension
tables 2-7
Rated voltage dimension (mm)
(kV) l l1 φ1 φ L
6/6 30 L+160 PHI +10 connection
8.7/10 45 L+240 PHI +15 pipe diameter pipe
length
Note: 1. Increased core insulation around
black glass paint materials using oil immersion or PCE. When using PTFE tape,
additional specifications around the lead casing and the insulation thickness
can be reduced.
2. the material number rated voltage 8.7/10kV,
conductor cross section 120mm2 the aluminium core cable connector, for example.
3.9 remove temporary gauze, dismantle the
temporary gauze on turnkey and peel off the masking paper, from expanded lead
on 100mm winds 8 oil-filled black paint across the belt and crammed into
bulging lead mouth enclosed Kanehira.
3.10-lead:
3.10.1 move the lead casing to the Middle,
making the decision to tap both ends of the lead casing, knocking into a cone,
tightly wrapped in lead casing cable lead-Pack on it. Knock hard and not too
heavy, in case the lead casing split fold, not knocking injuries lead package.
3.10.2 seal. The lead casing injection
holes up, using a blowtorch, baking lead casing and the lead pack with fat
powder (stearic acid) to remove dirt, then seal, seal, there are two: l) drop
of lead. Using a blowtorch to seal evenly coated to lead pipes and lead Pack,
using a blowtorch to seal into a paste, using cloth to seal after forming, with
fat powder cooling decontamination, forming beautiful, surface treatment of
Chlamydia trachomatis in no light. 2) cast lead. Heat the seal into a paste,
then evenly pour the lead pipe on Cone, to a certain amount, forming with a
blowtorch, and other practices with drops of lead.
3.11 pouring insulation adhesive:
After appropriate heat insulation adhesive
(170~180℃) by the end with glue-pouring in lead casing, filled for the first
time, adding the second the temperature at 60 ℃, and gluing agent
holes in the lid, seal firmly. While the second layer of the steel belt and
lead package with seals, and used as a grounding. Ground wire sealing
requirements are as follows: coated steel belt and lead lead up to 25mm wide
and 30mm.
3.12 anticorrosion and installation of
concrete protection box:
Brushing a layer of thermal insulation glue
around the lead casing, then Korea wrap two layers of (tarred), brushing the
outer surface layer of bituminous paint, intermediate head protection box flat
on the cement with fine soil fill.
3.13 planted flags:
Middle head will be installed in trenches
filled with fine soil, and then laying cement joint stakes, and out of the
ground, as symbol.
3.14 try running the acceptance:
3.14.1 the first cable production has been
completed, as required by the test Department pressure and test.
3.14.2 acceptance power no load operation
24 hours without exception the acceptance formalities, AC units. Submit change
negotiations, product certification, technical information such as
specifications, test reports, and running records.
4 quality criteria
4.1 project:
4.1.1 cable head pressure results, the
leakage current and insulation resistance code requirements must be met.
4.1.2 cable head closed tight, and full, no
bubbles, no oil leakage, no cracks. Cored wires tightly.
Inspection method: observation of
inspection and test records.
4.2 Basic project:
Cable head good looks, smooth and
wrinkle-free, glossy.
Inspection method: Visual check.
5 finished product protection
5.1 device upon opening the box, put in
order in a porcelain dish, covered with white cloth, preventing debris from
entering.
5.2 cable is completed, install now fill.
When the delay to fill, cable head and wooden box protection to prevent
smashing, touch.
6 quality problems to be noticed
6.1 roast lead packages, torch to simmer,
so as not to damage the lead Pack and paper.
6.2 cable insulating paper cannot be
damaged, in particular the tripod broke off caution when bending, not too hard,
wrap insulation when not moving the wires back and forth, so as not to damage
the insulation paper.
6.3 when the seal, wrist to be flexible,
faster, so as not to damage the lead Pack and paper insulation.
Quality of 7 records
7.1 product certificate.
7.2 cable test report form.
7.3 equipment inspection records
7.4 compound test report form.
7.5 mutual inspection records.
7.6 change record of negotiation.
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