AS 62271.202-2008

1 - AS 62271.202-2008 High-voltage switchgear and controlgear - Part 202: High-voltage/low-voltage prefabricated substation
4 - PREFACE
6 - CONTENTS
8 - INTRODUCTION
9 - 1 General
9 - 1.1 Scope
9 - 1.2 Normative references
11 - 1.3 Terms and definitions
13 - 2 Service conditions
13 - 2.1 Normal service conditions
13 - 2.2 Special service conditions
14 - 3 Requirements for components
14 - 4 Ratings
15 - 4.1 Rated voltages
15 - 4.2 Rated insulation levels
15 - 4.3 Rated frequency and number of phases
15 - 4.4 Rated normal currents and temperature rise
16 - 4.5 Rated short-time withstand currents
16 - 4.6 Rated peak withstand currents
16 - 4.7 Rated duration of short circuit
16 - 4.8 Rated supply voltage of closing and opening devices and auxiliary and control circuits
16 - 4.9 Rated supply frequency of closing and opening devices and auxiliary and control circuits
16 - 4.10 Rated maximum power and class of enclosure
17 - 5 Design and construction
17 - 5.1 Earthing
18 - 5.2 Auxiliary equipment
18 - 5.3 Nameplate
18 - 5.4 Degree of protection and internal fault
20 - 5.5 Enclosure
22 - 5.6 Other provisions
23 - 5.7 Sound emission
23 - 5.8 Electromagnetic compatibility (EMC)
23 - 6 Type tests
23 - 6.1 General
24 - 6.2 Dielectric tests
26 - 6.3 Temperature-rise tests
29 - 6.4 Short-time and peak withstand current tests on main and earthing circuits
29 - 6.5 Functional tests
29 - 6.6 Verification of the degree of protection
30 - 6.7 Calculations and mechanical tests
30 - 6.8 Internal arcing test
30 - 6.9 Electromagnetic compatibility test (EMC)
30 - 7 Routine tests
31 - 7.1 Dielectric test on the HV interconnection
31 - 7.2 Voltage withstand tests on auxiliary circuits
31 - 7.3 Functional tests
31 - 7.4 Verification of correct wiring
31 - 7.5 Tests after assembly on site
31 - 8 Guide to the selection of prefabricated substations for service
31 - 8.1 Selection of rated values
32 - 8.2 Selection of class of enclosure
32 - 8.3 Selection of internal arc classification
35 - 8.4 Information
40 - 9 Information to be given with enquiries, tenders and orders
40 - 9.1 Information with enquiries and orders
41 - 9.2 Information with tenders
41 - 10 Rules for transport, installation, operation, maintenance and end-of-service life
42 - 10.1 Conditions during transport, storage and installation
42 - 10.2 Installation
43 - 10.3 Operation
43 - 10.4 Maintenance
43 - 10.5 Dismantling, recycling and disposal at the end-of-service life
43 - 11 Safety
43 - 11.1 Electrical aspects
43 - 11.2 Mechanical aspects
43 - 11.3 Thermal aspects
46 - Annex A (normative) Method for testing the prefabricated substation under conditions of arcing due to an internal fault
59 - Annex B (normative) Test to verify the sound level of a prefabricated substation
61 - Annex C (normative) Mechanical impact test
63 - Annex D (informative) Rating of transformers in an enclosure
66 - Annex E (informative) Examples of earthing circuits
69 - Annex F (informative) Characteristics of enclosure materials
71 - Bibliography

Specifies the service conditions, rated characteristics, general structural requirements and test methods of HV/LV or LV/HV prefabricated substations, which are cable-connected, to be operated from inside (walk-in type) or outside (non-walk-in type) for alternating current of rated voltages above 1 kV and up to and including 52 kV on the HV side, and for one or more transformers for service frequencies up to and including 60 Hz for outdoor installation in locations with public accessibility.

Originated as AS 61330-2005.
Revised and redesignated as AS 62271.202-2008.