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BS EN 62271-212:2017

BS EN 62271-212:2017

$165.47

High-voltage switchgear and controlgear – Compact Equipment Assembly for Distribution Substation (CEADS)

Published By Publication Date Number of Pages
BSI 2017 80
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This part of IEC 62271 specifies the service conditions, rated characteristics, general structural requirements and test methods of the assemblies of the main electrical functional units of a high-voltage/low-voltage distribution substation, duly interconnected, for alternating current of rated operating voltages above 1 kV and up to and including 52 kV on the high-voltage side, service frequency 50 Hz or 60 Hz. This assembly is to be cable-connected to the network, and intended for installation within an indoor or outdoor closed electrical operating area.

A Compact Equipment Assembly for Distribution Substation (CEADS) as defined in this document is designed and tested to be a single product with a single serial number and one set of documentation.

The functions of a CEADS are:

  • switching and control for the operation of the high-voltage circuit(s);

  • protection of the high-voltage/low-voltage transformer functional unit;

  • high-voltage/low-voltage transformation;

  • switching and control for the operation and protection of the low-voltage feeders.

However relevant provisions of this document are also applicable to designs where not all of these functions exist (e.g. equipment comprising only high-voltage/low-voltage transformation and switching and control for the operation and protection of the low-voltage feeder functions or equipment without switching and control for the operation of the high-voltage circuit(s)).

NOTE

For the purpose of this document a self-protected transformer is considered not as a CEADS, but as a functional unit, designed and type tested to its own product standard IEC 60076‑13:2006 .

PDF Catalog

PDF Pages PDF Title
7 English
CONTENTS
12 FOREWORD
14 INTRODUCTION
15 1 General
1.1 Scope
1.2 Normative references
17 2 Normal and special service conditions
2.1 Normal service conditions
2.2 Special service conditions
3 Terms and definitions
19 4 Ratings
4.1 Rated voltage
20 4.2 Rated insulation level
4.3 Rated frequency (fr)
4.4 Rated normal current and temperature rise
4.4.1 Rated normal current (Ir ,InA)
4.4.2 Temperature rise
21 4.5 Rated short-time withstand currents (Ik, Ike, Icw)
4.5.101 Rated short-time phase to phase and rated short-time phase to earth withstand currents of high-voltage functional unit and rated short-time withstand current of high-voltage interconnection (Ik, Ike)
4.5.102 Rated short-time withstand currents of low-voltage functional unit and low-voltage interconnection (Icw)
4.5.103 Short-time withstand currents of high-voltage/low-voltage transformer functional unit
4.6 Rated peak withstand currents (Ip, Ipe, Ipk)
4.6.101 Rated peak phase to phase and rated peak phase to earth withstand currents of high-voltage functional unit and rated peak withstand current of high-voltage interconnection (Ip, Ipe)
22 4.6.102 Rated peak withstand currents of low-voltage and low-voltage interconnection (Ipk)
4.6.103 Peak withstand currents of high-voltage/low-voltage transformer functional unit
4.7 Rated durations of short circuit (tk, tke, tcw)
4.7.101 Rated duration of phase to phase short circuit (tk) and rated duration of phase to earth short circuit (tke) of high-voltage functional unit and rated duration of short-circuit of high-voltage interconnection
4.7.102 Rated duration of short circuit (tcw) for low-voltage functional unit and low-voltage interconnection
4.7.103 Duration of short circuit for high-voltage/low-voltage transformer functional unit
4.8 Rated supply voltage of closing and opening devices and of auxiliary and control circuits
4.9 Rated supply frequency of closing and opening devices and of auxiliary circuits
23 4.101 Rated power and total losses of CEADS
4.102 Ratings of the internal arc classification (IAC)
4.102.1 General
4.102.2 Types of accessibility (A, B, AB)
4.102.3 Classified sides
4.102.4 Rated arc fault currents (IA, IAe)
24 4.102.5 Rated arc fault duration (tA, tAe)
5 Design and construction
5.1 Requirements for liquids in switchgear and controlgear
25 5.2 Requirements for gases in switchgear and controlgear
5.3 Earthing of switchgear and controlgear
5.4 Auxiliary and control equipment
5.5 Dependent power operation
26 5.6 Stored energy operation
5.7 Independent manual or power operation (independent unlatched operation)
5.8 Operation of releases
5.9 Low- and high-pressure interlocking and monitoring devices
5.10 Nameplates
5.11 Interlocking devices
5.12 Position indication
5.13 Degrees of protection provided by enclosures
27 5.14 Creepage distances for outdoor insulators
5.15 Gas and vacuum tightness
5.16 Liquid tightness
5.17 Fire hazard (flammability)
5.18 Electromagnetic compatibility (EMC)
5.19 X-ray emission
28 5.20 Corrosion
5.101 Protection against mechanical stresses
5.102 Protection of the environment due to internal defects
5.103 Internal arc fault
29 5.104 Enclosures
5.105 Sound emission
5.106 Electromagnetic fields
6 Type tests
6.1 General
30 6.1.1 Grouping of tests
6.1.2 Information for identification of test objects
6.1.3 Information to be included in type-test reports
31 6.2 Dielectric tests
6.2.1 General
6.2.2 Dielectric tests on the high-voltage interconnection
32 6.2.3 Dielectric tests on the low-voltage interconnection
33 6.2.4 Dielectric tests on high-voltage functional unit
6.2.5 Dielectric tests on high-voltage/low-voltage transformer functional unit
6.2.6 Dielectric tests on low-voltage functional unit
34 6.2.7 Partial discharge test
6.3 Radio interference voltage (r.i.v) test
6.4 Measurement of the resistance of circuits
6.5 Temperature-rise tests
6.5.1 General
6.5.2 Test conditions
35 6.5.3 Test methods
36 Figures
Figure 1 – Test diagram in case of type tested high-voltage functional unit
Figure 2 – Test diagram in case of non-type tested high-voltage functional unit
37 Figure 3 – Alternative diagram in case of type tested high-voltage functional unit
38 6.5.4 Special case of dry-type high-voltage/low-voltage transformer functional unit
6.5.5 Measurements
Figure 4 – Diagram for the open-circuit test
40 6.6 Short-time withstand current and peak withstand current tests
6.6.1 Short-time and peak withstand current tests on main circuit of high-voltage and low-voltage functional units
6.6.2 Short-time and peak withstand current tests on high-voltage and low-voltage interconnections
6.6.3 Short-time and peak withstand current tests on earthing circuits
41 6.6.4 Short-time and peak withstand current tests on high-voltage/low-voltage transformer functional unit
6.7 Verification of the protection,
6.7.1 Verification of degree of protection (IP coding)
6.7.2 Verification of resistance to mechanical impacts (IK coding)
6.8 Tightness tests
6.9 Electromagnetic compatibility tests (EMC)
6.10 Additional tests on auxiliary and control circuits
6.10.1 General
42 6.10.2 Functional tests
6.10.3 Electrical continuity of earthed metallic parts test
6.10.4 Verification of the operational characteristics of auxiliary contacts
6.10.5 Environmental tests
6.10.6 Dielectric test
6.11 X-radiation test procedure for vacuum interrupters
6.101 Internal arc test
6.101.1 General
43 6.101.2 Test conditions
6.101.3 Arrangement of the equipment
44 6.101.4 Test procedure
6.101.5 Criteria to pass the test
6.101.6 Test report
45 6.101.7 Extension of validity of test results
6.102 Verification of making and breaking capacities
6.103 Mechanical operation tests
6.104 Mechanical stability test
6.105 Pressure withstand test for gas-filled compartments
46 6.106 Measurements of leakage currents of non-metallic enclosures
6.107 Weatherproofing test
6.108 Tightness and mechanical strength for liquid filled compartments
6.109 Measurement or calculation of electromagnetic fields
47 7 Routine tests
7.1 Dielectric tests on the main circuit
7.1.1 General
7.1.2 Dielectric tests on high-voltage functional unit
48 7.1.3 Dielectric tests on high-voltage/low-voltage transformer functional unit and high-voltage interconnection
7.1.4 Dielectric tests on low-voltage functional unit and low-voltage interconnection
7.2 Tests on auxiliary and control circuits
7.3 Measurement of the resistance of the main circuit
7.4 Tightness test
7.5 Design and visual checks
7.101 Mechanical operation tests on high-voltage functional unit
7.102 Pressure tests of gas-filled compartments
49 7.103 Tests of auxiliary electrical, pneumatic and hydraulic devices
7.104 Measurement of the resistance of the windings
7.105 Measurement of the voltage ratio
7.106 Measurement of the short circuit impedance and load losses
7.107 Measurement of no-load losses and current
7.108 Inspection of the low-voltage functional unit, including inspection of wiring and, if necessary, electrical operation test
7.109 Checking of protective measures and of the electrical continuity of the protective circuits of the low-voltage functional unit
7.110 Tests after assembly on site
8 Guide to the selection of CEADS
50 8.1 Selection of rated values
8.2 Continuous or temporary overload due to changed service conditions
8.101 Selection of internal arc classification
Tables
Table 1 – Locations, causes and examples of measures decreasing the probability of internal arc faults
51 Table 2 – Examples of measures limiting the consequences of internal arc faults
52 8.102 Information
Table 3 – Summary of technical requirements, ratings for CEADS – Service conditions
53 Table 4 – Summary of technical requirements, ratings for CEADS – Ratings of the CEADS
55 Table 5 – Summary of technical requirements, ratings for CEADS – Design and construction of the CEADS
56 9 Information to be given with enquiries, tenders and orders
9.1 Information with enquiries and orders
57 9.2 Information with tenders
10 Rules for transport, installation, operation and maintenance
58 10.1 Conditions during transport, storage and installation
10.2 Installation
10.2.1 Unpacking and lifting
10.2.2 Assembly
10.2.3 Mounting
10.2.4 Final installation inspection
10.3 Operation
59 10.4 Maintenance
10.5 Dismantling, recycling and disposal at the end of service life
11 Safety
11.101 Electrical aspects
11.102 Mechanical aspects
11.103 Thermal aspects
11.104 Internal arc aspects
12 Influence of the product on the environment
61 Annex AA (normative) Method for testing CEADS under conditions of arcing due to an internal arc fault
AA.1 General
AA.2 Room simulation
AA.3 Indicators (for assessing the thermal effects of the gases)
AA.3.1 General
62 AA.3.2 Arrangement of indicators
63 AA.4 Tolerances for geometrical dimensions of test arrangements
AA.5 Test parameters
AA.6 Test procedure
64 AA.7 Designation of the internal arc classification
65 Figure AA.1 – Mounting frame for vertical indicators
Figure AA.2 – Horizontal indicators
66 Figure AA.3 – Protection of operators in front of classified side(s) of CEADS
Figure AA.4 – Protection of general public around the CEADS
67 Figure AA.5 – Protection of operators in front of classified side(s) of CEADS having a pressure relief volume below the floor
68 Figure AA.6 – Protection of general public around the CEADS having a pressure relief volume below the floor
69 Figure AA.7 – Selection of tests on high-voltage switchgear for class IAC-A
70 Figure AA.8 – Selection of tests on high-voltage switchgear for class IAC-B
71 Figure AA.9 – Selection of tests on high-voltage interconnection for class IAC-A
72 Figure AA.10 – Selection of tests on high-voltage interconnection for class IAC-B
73 Annex BB (normative) Test to verify the sound level of a CEADS
BB.1 Purpose
BB.2 Test object
BB.3 Test method
BB.4 Measurements
BB.5 Presentation and calculation of the results
74 Annex CC (informative) Types and application of CEADS
CC.1 Type of CEADS
CC.1.1 General
CC.1.2 CEADS-G
CC.1.3 CEADS-A
CC.1.4 CEADS-I
CC.2 Application of CEADS
75 Figure CC.1 – Application of CEADS
76 Figure CC.2 – CEADS Type G
Figure CC.3 – CEADS Type A
77 Figure CC.4 – CEADS Type I
78 Bibliography

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