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GENERAL INSTRUCTIONS FOR PREFORMA PF-4 / 5
ASSEMBLY AND USE OF PREFABRICATED PRIVATE
SUBSTATIONS (LV METERING)
IG-138-FR
version 02
02.10.2007
Page 3 of 28
INDEX
1.
DESCRIPTION OF THE ENCLOSURE ......................................................................... 5
1.1.
ADJUSTMENT OF VENTS ACCORDING TO TRANSFORMER POWER ................. 5
1.2.
MV / LV SINGLE WIRE DIAGRAM ............................................................................. 6
1.2.1.
Oil Retention Tank ............................................................................................... 7
1.2.2.
Cable Entries........................................................................................................ 7
1.2.3.
Access to the Substation ...................................................................................... 7
1.2.4.
Telltale.................................................................................................................. 8
1.2.5.
Antenna Fixture .................................................................................................... 8
1.2.6.
Identification of the Substation ............................................................................. 8
1.3.
ELECTRICAL EQUIPMENT ........................................................................................ 8
1.3.1.
Transformer .......................................................................................................... 8
1.3.2.
MV switchgear ...................................................................................................... 9
1.3.3.
MV Connection..................................................................................................... 9
1.3.4.
MV Cable Curvature Radii ................................................................................... 9
1.3.5.
LV switchgear ..................................................................................................... 10
1.3.6.
LV connection between Transformer and TGBT ................................................ 10
1.3.7.
Connection of the LV Network ........................................................................... 10
1.3.8.
Auxiliary Circuits ................................................................................................. 10
1.4.
PROTECTION AND GROUNDING CIRCUITS ......................................................... 11
1.4.1.
Earthing the Conductive Parts ........................................................................... 11
1.4.2.
Grounding the LV Neutral .................................................................................. 11
1.5.
MAINTENANCE ......................................................................................................... 11
2.
MECHANICAL FEATURES ........................................................................................ 12
3.
TRANSPORT ............................................................................................................... 13
4.
MOUNTING ................................................................................................................. 14
4.1.
EXCAVATION PLAN ................................................................................................. 14
4.2.
HOISTING - GUIDELINES ......................................................................................... 15
4.3.
CONSTITUENT PARTS ............................................................................................ 16
4.4.
EARTHING CIRCUITS .............................................................................................. 17
4.4.1.
Excavation Bottom Earth .................................................................................... 17
