Schneider Electric - Electrical installation guide 2009
B
© Schneider Electric - all rights reserved
Chapter B
Connection to the MV utility
distribution network
Contents
Supply of power at medium voltage
B2
1.1 Power supply characteristics of medium voltage
B2
utility distribution network
1.2 Different MV service connections
B11
1.3 Some operational aspects of MV distribution networks
B12
Procedure for the establishment of a new substation
B4
2.1 Preliminary informations
B14
2.2 Project studies
B15
2.3 Implementation
B15
2.4 Commissioning
B15
Protection aspect
B6
3.1 Protection against electric shocks
B16
3.2 Protection of transformer and circuits
B17
3.3 Interlocks and conditioned operations
B19
The consumer substation with LV metering
B22
4.1 General
B22
4.2 Choice of MV switchgear
B22
4.3 Choice of MV switchgear panel for a transformer circuit
B25
4.4 Choice of MV/LV transformer
B25
4.5 Instructions for use of MV equipment
B29
The consumer substation with MV metering
B32
5.1 General
B32
5.2 Choice of panels
B34
5.3 Parallel operation of transformers
B35
Constitution of MV/LV distribution substations
B37
6.1 Different types of substation
B37
6.2 Indoor substation
B37
6.3 Outdoor substation
B39
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3
4
5
6
Schneider Electric - Electrical installation guide 2009
B - Connection to the MV public
distribution network
B2
© Schneider Electric - all rights reserved
The term "medium voltage" is commonly used for distribution systems with voltages
above 1 kV and generally applied up to and including 52 kV (see IEC 601-01-28
Standard).
In this chapter, distribution networks which operate at voltages of 1,000 V or less
are referred to as Low-Voltage systems, while systems of power distribution which
require one stage of stepdown voltage transformation, in order to feed into low voltage
networks, will be referred to as Medium- Voltage systems.
For economic and technical reasons the nominal volta