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eLibrary > IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV-38 kV) (Published) >

IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV-38 kV) (Published), 2013

This document is reproduced and distributed under license from The Institute of Electrical and Electronics Engineers, Incorporated (IEEE), 445 Hoes Lane, Piscataway, New Jersey 08854 and is protected by United States and international copyright laws and treaties. No part of this publication may be reproduced, in any form and in any medium, without the prior written consent of the IEEE. If you have any questions, please contact MADCAD.com at support@madcad.com or call at 1.800.798.9296.

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IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV-38 kV) (Published), 2013

IEEE Std C37.20.3-2013 Front Cover
Title page
Important Notices and Disclaimers Concerning IEEE Standards Documents
Participants
Introduction
CONTENTS
Important Notice
1. Overview [Go to Page]
1.1 Scope
1.2 Purpose
2. Normative references
3. Definitions
4. Normal (usual) and special (unusual) service conditions [Go to Page]
4.1 Normal (usual) and special (unusual) service conditions [Go to Page]
4.1.1 Indoor switchgear
4.1.2 Outdoor switchgear
4.2 Special (unusual) service conditions for both indoor and outdoor switchgear [Go to Page]
4.2.1 Altitude
4.2.2 Exposure to excessive pollution
4.2.3 Temperature and humidity
4.2.4 Exposure to abnormal vibration, shock, or tilting
4.2.5 Other special (unusual) service conditions [Go to Page]
4.2.5.1 Exposure to damaging fumes, vapor, steam, oil vapors, salt air, and hot and humid climate
4.2.5.2 Exposure to excessive dust or abrasive, magnetic, or metallic dust
4.2.5.3 Exposure to explosive mixtures of dust of gases
4.2.5.4 Unusual space limitations
4.2.6 Other parameters
5. Ratings [Go to Page]
5.1 General
5.2 Voltage and insulation levels [Go to Page]
5.2.1 Rated maximum voltage (V ) or (Ur )
5.2.2 Rated insulation level, Ud , Up
5.3 Rated power frequency (fr)
5.4 Rated continuous (normal) current and temperature rise [Go to Page]
5.4.1 Rated continuous (normal) current (Ir)
5.4.2 Temperature rise
5.5 Rated short-time withstand current (Ik)
5.6 Rated peak withstand current (Ip)
5.7 Rated duration of short circuit (tk)
5.8 Current transformer ratings [Go to Page]
5.8.1 Current transformer mechanical ratings
5.8.2 Current transformer thermal ratings
5.8.3 Current transformer ambient temperature
5.8.4 Current transformer accuracies
5.9 Voltage transformers
6. Tests [Go to Page]
6.1 Grouping of tests [Go to Page]
6.1.1 Information for identification of specimens
6.1.2 Information to be included in design-test (type-test) reports
6.2 Dielectric tests [Go to Page]
6.2.1 Ambient air conditions during tests
6.2.2 Wet test procedure
6.2.3 Conditions of switchgear during dielectric tests
6.2.4 Criteria to pass the test
6.2.5 Application of the test voltage and test conditions [Go to Page]
6.2.5.1 General case
6.2.5.2 Special case
6.2.6 Tests of switchgear of V ≤ 245 kV (Ur ≤ 245 kV) [Go to Page]
6.2.6.1 Power frequency voltage tests
6.2.6.2 Lightning impulse voltage tests
6.2.7 Tests of switchgear of rated maximum voltage of V > 245 kV (Ur > 245 kV)
6.2.8 Artificial pollution tests for outdoor insulators
6.2.9 Partial discharge tests—optional
6.2.10 Dielectric tests on auxiliary and control circuits
6.2.11 Voltage test as condition check
6.2.12 Insulation paths [Go to Page]
6.2.12.1 Non atmospheric paths
6.3 Radio influence voltage (RIV) test
6.4 Measurement of resistance of circuits [Go to Page]
6.4.1 Main circuit
6.4.2 Auxiliary contacts
6.5 Temperature-rise tests [Go to Page]
6.5.1 Conditions of the switchgear to be tested
6.5.2 Arrangement of the equipment
6.5.3 Measurement of the temperature and the temperature-rise
6.5.4 Ambient air temperature
6.5.5 Temperature-rise testing of the auxiliary and control equipment
6.5.6 Interpretation of the temperature-rise tests
6.6 Short-time withstand current and peak withstand current tests [Go to Page]
6.6.1 Arrangement of the switchgear and of the test circuit
6.6.2 Test current and duration [Go to Page]
6.6.2.1 Test connections for primary bus and connections
6.6.2.2 Test connections for ground bus
6.6.3 Behavior of switchgear during test [Go to Page]
6.6.3.1 Main bus
6.6.3.2 Ground bus
6.6.4 Conditions of switchgear after test
6.7 Verification of the degrees of protection provided by enclosures
6.8 Tightness tests
6.9 Electromagnetic compatibility tests
6.10 Additional tests on auxiliary and control circuits
6.11 X-Radiation procedure for vacuum interrupters
6.12 Mechanical endurance tests [Go to Page]
6.12.1 Stationary devices
6.12.2 Drawout devices
6.13 Insulating materials
6.14 Bus-bar insulation [Go to Page]
6.14.1 Test for bus-bar insulation
6.14.2 Flame-resistance tests for applied insulation
6.15 Coatings qualification test [Go to Page]
6.15.1 Organic coating qualification test [Go to Page]
6.15.1.1 Test specimens
6.15.1.2 Test apparatus
6.15.1.3 Preparation of test specimens
6.15.1.4 Exposure of test specimens
6.15.1.5 Procedure
6.15.1.6 Evaluation
6.15.1.7 Performance
6.15.2 Other coatings qualification tests [Go to Page]
6.15.2.1 Hot-dipped galvanized qualification test
6.15.2.2 Other metallic finishes qualification test
6.16 Rain test for outdoor MEI switchgear
6.17 Production test [Go to Page]
6.17.1 Dielectric test on the main circuit
6.17.2 Dielectric test on auxiliary and control circuits
6.17.3 Measurement of the resistance of the main circuit
6.17.4 Tightness test
6.17.5 Design and visual checks
6.17.6 Mechanical operation tests
6.17.7 Grounding of instrument transformer case tests
6.17.8 Electrical operation and control wiring test [Go to Page]
6.17.8.1 Control wiring continuity
6.17.8.2 Polarity verification
6.17.8.3 Sequence tests
6.18 Conformance tests
6.19 Field dielectric tests
7. Construction [Go to Page]
7.1 Buses and primary connections [Go to Page]
7.1.1 Phase arrangements
7.1.2 Phase sequence
7.1.3 Cable terminations
7.1.4 Bushings or cable terminators
7.1.5 Main bus splices
7.1.6 Isolating means
7.2 Grounding and bonding
7.3 Control and secondary circuits and devices [Go to Page]
7.3.1 General
7.3.2 Voltage transformer fusing
7.3.3 Control and secondary wiring [Go to Page]
7.3.3.1 Wiring across a hinge
7.3.3.2 Wire size
7.3.3.3 Wire protection and support
7.3.3.4 Wire type
7.3.4 Secondary-wiring terminals
7.3.5 Terminal blocks
7.3.6 Designation of auxiliary switches and contacts
7.3.7 Device function numbers
7.3.8 Voltage limits of instrument and control circuits
7.3.9 Polarity of dc connections to device coils
7.3.10 Isolation [Go to Page]
7.3.10.1 Circuit breaker control components
7.4 Miscellaneous [Go to Page]
7.4.1 Nameplate marking
7.4.2 Wiring devices
7.4.3 Inspection windows
7.4.4 Covers
7.4.5 Ventilation openings and vent outlets
7.4.6 Service disconnecting means
7.5 Materials and finish [Go to Page]
7.5.1 Materials
7.5.2 Finishes and color
7.6 Precautionary labels
7.7 Barriers
7.8 Shutters
7.9 Interlocks [Go to Page]
7.9.1 Stationary interrupters [Go to Page]
7.9.1.1 Stationary switch
7.9.1.2 Stationary circuit breaker with an isolating switch
7.9.2 Drawout interrupters [Go to Page]
7.9.2.1 Drawout switches
7.9.2.2 Drawout circuit breaker
7.9.2.3 Control power transformers
7.10 Enclosure categories [Go to Page]
7.10.1 Indoor MEI switchgear, access, and ventilation
7.10.2 Outdoor MEI switchgear, access, and ventilation
7.11 Circuit breaker open/close position indication
8. Application guide for MEI switchgear [Go to Page]
8.1 Unusual service conditions [Go to Page]
8.1.1 Ambient air temperature above 40 ˚C
8.1.2 Ambient air temperature below –30 ˚C
8.1.3 Application at unusual altitudes
8.1.4 Modiﬁcation of equipment for unusual environment [Go to Page]
8.1.4.1 Exposure to damaging fumes, vapors, steam, salt air, and oil vapors
8.1.4.2 Exposure to excessive dust, abrasive dust, magnetic dust, or metallic dust
8.1.4.3 Exposure to hot and humid climate
8.1.4.4 Exposure to explosive mixtures of dust or gases
8.1.4.5 Exposure to abnormal vibration, shocks, or tilting
8.1.4.6 Exposure to seismic shock
8.2 System characteristics—voltage and frequency
8.3 Overvoltage considerations—insulation levels
8.4 Continuous current rating and overload capability [Go to Page]
8.4.1 Conductor temperature
8.4.2 Conductor terminations
8.5 Short-circuit considerations
8.6 Nuclear power plant application
8.7 Exposed circuits
8.8 Surge arresters in switchgear assemblies
8.9 Protection and isolation of switchgear connected to other switching equipment
8.10 Current transformer accuracies
9. Guide for handling, storage, and installation [Go to Page]
9.1 Handling [Go to Page]
9.1.1 Receiving
9.1.2 Rigging
9.1.3 Storage
9.1.4 Installation
9.1.5 Removal of shipping members
9.1.6 Connections [Go to Page]
9.1.6.1 Bus connections
9.1.6.2 Cable connections
9.1.6.3 Control connections
9.1.6.4 Grounding
9.2 Pre-operation check
9.3 Interrupters
9.4 Interlocks [Go to Page]
9.4.1 Power fuses
9.4.2 Stationary circuit breakers
9.4.3 Drawout interrupters
9.5 Energization
Annex A (normative) Guide for enclosure categories and related requirements [Go to Page]
A.1 Scope
A.2 Enclosure categories [Go to Page]
A.2.1 Category A enclosures
A.2.2 Category B enclosures
A.2.3 Category C enclosures
A.3 Enclosure requirements [Go to Page]
A.3.1 Equivalent construction [Go to Page]
A.3.1.1 Unsupported areas
A.3.1.2 Deﬂection test
A.3.1.3 Torsion test
A.3.2 Access doors and covers
A.3.3 Enclosure and ventilation openings [Go to Page]
A.3.3.1 Enclosure openings
A.3.3.2 Ventilation openings
A.3.3.3 Rod entry tests
A.3.3.4 Evaluation
A.3.4 Operating handle protection
A.3.5 Operating handles
A.3.6 Viewing panes
A.3.7 Accessories
A.3.8 Outdoor enclosure requirements [Go to Page]
A.3.8.1 General
A.3.8.2 Test requirements
A.3.8.3 Gasketing
A.3.9 Exposed live parts
A.3.10 Exposed fasteners
A.3.11 External marking
Annex B (normative) Flame-resistance tests for applied insulation [Go to Page]
B.1 Test apparatus
B.2 Preparation of sample
B.3 Test procedure
B.4 Analysis
Annex C (informative) Bibliography [Go to Page]

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IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV-38 kV) (Published), 2013

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