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State: 09/2010 Technical changes reserved! 4
Technical documentation and
instruction manual
Lahmeyer-Compact-Station®
Type NDV400/401
Zeichnungs.-Nr.. 0152J77.0
2. Station housing
Temperature class = 15 K
The substation, type NDV400/401 is, like all Lahmeyer-Compactstations®, a plant ready and
unit verified installation. It contains a medium voltage, a transformer and a low voltage room.
After connecting the MV and LV cables the substation is ready for operation.
2.1 The case of the substation, type NDV400/401, is a sheet-curved construction.
The sation consists of:
-the foundation with oil sump, oilproof welded, afterwards hot dip galvanized (zinc) and
double layer poudered (zinc pouder 70 m, top layer 70 m), with side parts formed like
skids which are the termination toward the earth and to the housing.
-two arbors curved of sheet iron to receive the MV and LV equipment, connected with the
foundation.
-simple movable roof ( the fixing screws are at the upper part of the door frame of the MV
and LV room and they are marked red)
-lockable plug diaphragm of the front side (access to the transformer).
-housing doors and cover diaphragms inclusive for the MV and LV room liftable in one unit.
2.2 Material and surface treatment
Material (underground):Oil sump: sheet iron 4 mm, hot dip galvanizes (zinc) (>750g/m²) and
double layer pouder coating (zincpuder 70 m, top layer 70 m), to pick
up the transformer
Skids made of sheet iron, 2 mm, hot dip galvanizes (zinc) (>225 g/m²)
double pouder coating 100 % without pores
(zinc pouder, top layer)
Optional : floor sump made of waterproof reinforced concrete using the exposure
calsses XC4;XF1;XA1 for exterior parts and XC1 for interior parts. The
armour of the floor sump consists of ribbled reinforcing concrete B 500
according to DIN EN 10080 and it is completely welded. The minimal
concrete covering is according to DIN 1048 part 1 bigger than the
possible water penetration detph.
Material (overground): sheet iron, 2 mm, strip galvanized (zinc) (> 225 g/m2)
Surface treatment: With IT-based pouder coating gear and 5-zones pretreatment layer
thicknesses equal > 70 µm. The used pouder varnishes are without
heavy metals and non toxic.
Zinc and pouder varnishes = highest corrosion protection.
Standard color: pebble grey (RAL 6003-S)
Remark:
The lodged pouder coeating can be recoated with liquid varnish into
another color by the user if he wants to. The former corrosion
protection remains existing!
2.3 All connecting elements of the housing are rust-proof (rustless steel).