IEEE C37.20.3 2014

$47.67

IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV38 kV)

Published By	Publication Date	Number of Pages
IEEE	2014	70

Guaranteed Safe Checkout

Category: IEEE

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

Revision Standard – Active. Metal-enclosed interrupter (MEI) switchgear assemblies containing, but not limited to, such devices as interrupter switches; selector switches; power fuses; circuit breakers; control, instrumentation and metering devices; and protective equipment are included in this standard. It includes, but is not specifically limited to, equipment for the control and protection of apparatus used for distribution of electrical power.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C37.20.3-2013 Front Cover
3	Title page
5	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
10	Introduction
11	CONTENTS
13	Important Notice 1. Overview 1.1 Scope 1.2 Purpose
14	2. Normative references
16	3. Definitions
17	4. Normal (usual) and special (unusual) service conditions 4.1 Normal (usual) and special (unusual) service conditions 4.1.1 Indoor switchgear
18	4.1.2 Outdoor switchgear 4.2 Special (unusual) service conditions for both indoor and outdoor switchgear 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 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
19	4.2.5.4 Unusual space limitations 4.2.6 Other parameters 5. Ratings 5.1 General 5.2 Voltage and insulation levels 5.2.1 Rated maximum voltage (V ) or (Ur ) 5.2.2 Rated insulation level, Ud , Up
20	5.3 Rated power frequency (fr) 5.4 Rated continuous (normal) current and temperature rise 5.4.1 Rated continuous (normal) current (Ir) 5.4.2 Temperature rise
22	5.5 Rated short-time withstand current (Ik) 5.6 Rated peak withstand current (Ip)
23	5.7 Rated duration of short circuit (tk) 5.8 Current transformer ratings 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
24	6. Tests 6.1 Grouping of tests 6.1.1 Information for identification of specimens 6.1.2 Information to be included in design-test (type-test) reports
25	6.2 Dielectric tests 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 6.2.5.1 General case
28	6.2.5.2 Special case 6.2.6 Tests of switchgear of V ≤ 245 kV (Ur ≤ 245 kV) 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
29	6.2.10 Dielectric tests on auxiliary and control circuits 6.2.11 Voltage test as condition check 6.2.12 Insulation paths 6.2.12.1 Non atmospheric paths 6.3 Radio influence voltage (RIV) test 6.4 Measurement of resistance of circuits 6.4.1 Main circuit 6.4.2 Auxiliary contacts
30	6.5 Temperature-rise tests 6.5.1 Conditions of the switchgear to be tested 6.5.2 Arrangement of the equipment
31	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
32	6.6 Short-time withstand current and peak withstand current tests 6.6.1 Arrangement of the switchgear and of the test circuit 6.6.2 Test current and duration 6.6.2.1 Test connections for primary bus and connections
33	6.6.2.2 Test connections for ground bus 6.6.3 Behavior of switchgear during test 6.6.3.1 Main bus
34	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
35	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 6.12.1 Stationary devices 6.12.2 Drawout devices
36	6.13 Insulating materials 6.14 Bus-bar insulation 6.14.1 Test for bus-bar insulation 6.14.2 Flame-resistance tests for applied insulation 6.15 Coatings qualification test 6.15.1 Organic coating qualification test
37	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
38	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 6.17.1 Dielectric test on the main circuit 6.17.2 Dielectric test on auxiliary and control circuits
39	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 6.17.8.1 Control wiring continuity 6.17.8.2 Polarity verification 6.17.8.3 Sequence tests
40	6.18 Conformance tests 6.19 Field dielectric tests 7. Construction 7.1 Buses and primary connections
41	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
42	7.2 Grounding and bonding 7.3 Control and secondary circuits and devices 7.3.1 General
43	7.3.2 Voltage transformer fusing 7.3.3 Control and secondary wiring 7.3.3.1 Wiring across a hinge 7.3.3.2 Wire size
44	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
45	7.3.6 Designation of auxiliary switches and contacts
46	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 7.3.10.1 Circuit breaker control components 7.4 Miscellaneous 7.4.1 Nameplate marking
47	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
48	7.5 Materials and finish 7.5.1 Materials 7.5.2 Finishes and color
49	7.6 Precautionary labels 7.7 Barriers 7.8 Shutters 7.9 Interlocks 7.9.1 Stationary interrupters 7.9.1.1 Stationary switch 7.9.1.2 Stationary circuit breaker with an isolating switch
50	7.9.2 Drawout interrupters 7.9.2.1 Drawout switches 7.9.2.2 Drawout circuit breaker
51	7.9.2.3 Control power transformers 7.10 Enclosure categories 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 8.1 Unusual service conditions 8.1.1 Ambient air temperature above 40 ËšC
52	8.1.2 Ambient air temperature below –30 ËšC 8.1.3 Application at unusual altitudes 8.1.4 Modiï¬cation of equipment for unusual environment 8.1.4.1 Exposure to damaging fumes, vapors, steam, salt air, and oil vapors
53	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
54	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
55	8.3 Overvoltage considerations—insulation levels 8.4 Continuous current rating and overload capability 8.4.1 Conductor temperature 8.4.2 Conductor terminations 8.5 Short-circuit considerations
56	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
57	9.1 Handling 9.1.1 Receiving 9.1.2 Rigging 9.1.3 Storage 9.1.4 Installation
58	9.1.5 Removal of shipping members 9.1.6 Connections 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
59	9.3 Interrupters 9.4 Interlocks 9.4.1 Power fuses 9.4.2 Stationary circuit breakers 9.4.3 Drawout interrupters 9.5 Energization
60	Annex A (normative) Guide for enclosure categories and related requirements A.1 Scope A.2 Enclosure categories A.2.1 Category A enclosures
61	A.2.2 Category B enclosures A.2.3 Category C enclosures A.3 Enclosure requirements A.3.1 Equivalent construction
62	A.3.1.1 Unsupported areas A.3.1.2 Deï¬‚ection test A.3.1.3 Torsion test A.3.2 Access doors and covers
63	A.3.3 Enclosure and ventilation openings A.3.3.1 Enclosure openings A.3.3.2 Ventilation openings
64	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
65	A.3.7 Accessories A.3.8 Outdoor enclosure requirements 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
66	A.3.11 External marking
67	Annex B (normative) Flame-resistance tests for applied insulation B.1 Test apparatus
68	B.2 Preparation of sample B.3 Test procedure
69	B.4 Analysis
70	Annex C (informative) Bibliography