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3
Transport and storage conditions
The bushing is shipped in a wooden box suitable for marine transport, designed to provide protection of the
bushing in accordance with the specified transport conditions.
The complete crate must be lifted, loaded on vehicles and transported with great care to prevent damages of
the bushing or its accessories. Stacking of crates is not allowed. Shock indicators are fixed on the crate walls.
GE Energy Connections RPV will not respond of any damage due to un-proper operations.
The total mass of the bushing packed and crates dimensions, as a function of the type, are listed in Table 1.
Centre of gravity and lifting points are painted on the crate walls. Top electrostatic shields are shipped in
separate crates.
Table 1 – Bushing mass and crate dimensions by bushing type
3.1
Transport conditions
The bushing can be transported by truck, ship, airplane. The bushing is filled with SF6 gas at a pressure of 0.125
MPa abs (0.25 bar gauge) and mineral oil at a pressure of 1 bar gauge at 20° C (see curve in Figure 8).
To check the gas pressure during the transportation or the long storage conditions, the bushing is equipped with
a Transport pressure gauge (see Figure 1) installed on a Dilo valve. This device must be removed during the
installation phase on the transformer, before the bushing filling at rated pressure and it has to be reused for the
bushing shipment at site.
In order to prevent dangerous movement of the crate during the transport it is responsibility of the transport
company to carefully fix it on the vehicle by suitable retain systems like ropes, synthetic pulling bands or any
other method.
The maximum allowed transport acceleration along the three axis is 5g (49.05 m/s
truck along very bad roads ('bumpy roads') the speed must be adequately reduced to max 30 km/h.
Trucks to be used for road transportation must have a platform of sufficient dimensions to accommodate the
overall crate. Crate overhang from any platform and hauling are not allowed.
The top of the crate is protected by a PE tarpaulin suitable for protection from rain. During the transport by road
or ship the good must be protected from rain, sea water and other exceptional environment conditions by
additional tarpaulins, not provided by GE Energy Connections RPV, suitable to cover completely the crate.
Sea transportation on the ship main deck is allowed providing the above mentioned additional protection.
Transportation in ship hold is preferred.
WARNING: The Transport pressure gauge must be removed from the bushing before the gas filling operation
at rated pressure. It must be used only at the transport pressure value. Higher pressures will damage it.
HVDC TRANSFORMER BUSHINGS
PHI 530.1425.2500
PHI 265.850.1500
Bushing type
PHI 530 kV
PHI 265 kV
Figure 1 – Transport pressure gauge
Kepco project
Dimensions
Crate mass
L x W x H
[kg]
4300
1020x170x220
2500
800x120x220
IS 2664 GB
Page 6 of 70
[cm]
2
). In case of transport by
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