Storage Before Assembly - ABB SF6 LTB 245E1 BLG 1002A Product Manual

Assembly Instructions

3.3 Storage before assembly

3.3.1 General
3.3.2 Stacking of cases
1HSB435410-2 enrev1
The circuit-breakers are normally delivered in units adapted for transport.
Intermediate storage of these units should be avoided. If intermediate storage can
not be avoided the units should be stored indoors or under a roof. They should also
be stored horizontally above ground level to avoid cracking or water damage. Upon
arrival it is important that the plastic cover is removed in order to prevent corrosion
due to condensation (except for spare parts, see
Storage in a humid climate, without proper ventilation, can lead to discolouring of
zinc coated surfaces. This discolouring is known as white rust, and consists mainly
of zinc oxide and zinc hydroxide and is a result of a chemical process between pure
zinc on the surface and moisture.
The long term rust protection is not affected because the steel-zinc layer under the
surface remains unaffected. According to Swedish standard the presence of white
rust is no reason to reject goods.
Upon arrival each unit should be checked regarding the following:
The delivery corresponds with the order and shipping documents
Damage due to transport and missing parts
If damage is discovered or suspected the case should be opened and photos taken.
Report damage as well as missing parts.
All components should be rationally stored for easy access. All material should be
stored in an approved store
inflammable gas, steam or salt must not pollute the surrounding air otherwise the
equipment must be cleaned before construction.
The original cases can be used for storage, but the plastic covering should be
removed. The assembly units' coupling pieces as well as connections are provided
with transport covers or protective covers which must not be removed until shortly
before the circuit-breakers are assembled.
Cases of different widths shall normally not be stacked (the pressure may destroy
the covers of the lower cases). If cases of different widths need to be stacked, a
framework must be used between the cases in order to distribute the pressure evenly.
Stacking of more than three cases is not allowed. It must be noted that stacking
causes instability sidewise and therefore the cases must be secured, i.e., prevented
from tumbling down or rolling over.
1. An approved store is defined as consisting of:
roof
firm base
humidity below 50%
temperature 20˚C (±10˚C)
avsnitt 3.3.5, Spare
1
, exceptions are stated below. Dust, smoke, corrosive or
Delivery
parts).
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