Chapter A General rules of electrical installation design

D32
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D - MV & LV architecture selection guide
12 Example: electrical installation
in a printworks
12.4 Architecture assessment criteria
Criteria Category
On-site work time Secondary
Environmental impact Minimal: compliance with European standard regulations
Preventive maintenance costs Standard
Power supply availability Level I
Step 1: Architecture fundamentals
Choice Main criteria Solution
Connection to upstream
network
Schneider Electric - Electrical installation guide 2008
Isolated site single branch circuit
MV Circuits Layout + criticality single feeder
Number of transformers Power > 2500kVA 2 x 2000kVA
Number and distribution of
substations
Surface area and power
distribution
MV Generator Site activity No
MV
LV
MV
LV
2 possible solutions: 1
substation or 2 substations
b if 1 substations: NO link
between MLVS
b if 2 substations:
interconnected switchboards
MLVS 1 MLVS 2 MLVS 1 MLVS 2
Fig. D29 : Two possible single-line diagrams
MV
LV
Trunking
MV
LV