IEEE C37.74-2014

$62.29

IEEE Standard Requirements for Subsurface, Vault, and Padmounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to 38 kV

Published By	Publication Date	Number of Pages
IEEE	2014

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. Required definitions, ratings, procedures for performing design tests and production tests, and construction requirements for subsurface, vault, and padmounted load-interrupter switchgear and fused load-interrupter switchgear for ac systems up to 38 kV are covered in this standard.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C37.74-2014 Front Cover
3	Title page
5	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
10	Introduction
11	Contents
13	Important Notice 1. Scope 2. Normative references
15	3. Definitions 3.1 Standard terms 3.2 Special terms
16	4. Normal (usual) and special (unusual) service conditions 4.1 Normal (usual) service conditions 4.1.1 Indoor DSG
17	4.1.2 Outdoor DSG 4.2 Special (unusual) service conditions 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
18	4.2.5.4 Unusual space limitations 4.2.6 Other parameters 5. Ratings, required related capabilities, and test requirements 5.1 General 5.2 Rating information 5.2.1 Overall ratings 5.2.1.1 Rated power frequency (fr) 5.2.1.2 Rated maximum voltage (V) or (Ur)
19	5.2.1.3 Rated lighting impulse withstand voltage (Up) 5.2.1.4 Rated power-frequency withstand voltage (Ud) 5.2.1.5 Rated short-time withstand current and duration (Ik) (tk) 5.2.1.6 DC withstand voltage (required related capability) 5.2.2 Individual way ratings
22	5.3 Continuous current ratings and related test requirements 5.3.1 Conditions of continuous current rating 5.3.2 Limits of observable temperature rise 5.3.3 Application of fuse
26	6. Design (type) tests
27	6.1 General 6.1.1 Condition of DSG to be tested 6.1.2 Mounting of the DSG 6.1.3 Maintenance 6.1.4 Power-frequency
28	6.2 Tests on connectors and bushings used on DSG 6.3 Testing of DSG as an entity 6.3.1 General 6.3.2 Test requirements
29	6.3.3 Condition of DSG following short-circuit tests 6.4 Testing of switches installed in switched ways and fused-switch ways 6.4.1 General 6.4.2 Test sequence 6.4.3 Condition of switching device in switched and fused-switch ways after test sequence
30	6.5 Testing of switching devices in fused-loadbreak ways 6.5.1 General
31	6.5.2 Test sequence 6.5.3 Condition of switching device in fused-loadbreak ways after test sequence 6.6 Testing of fusing devices used in fused ways, fused-switch ways, or fused- loadbreak ways 6.6.1 General 6.6.2 Test sequence 6.6.2.1 Dielectric withstand tests 6.6.2.2 Continuous current test
32	6.6.2.3 Short-circuit tests 6.6.3 Interrupting performance of fusing devices in the DSG 6.7 Test methods 6.7.1 General 6.7.2 Dielectric tests 6.7.2.1 Points of application of test voltage
34	6.7.2.2 Withstand test voltage 6.7.2.3 Fusing devices 6.7.2.4 Rated power-frequency withstand voltage tests 6.7.2.5 Lightning impulse voltage tests
35	6.7.3 Continuous current test 6.7.3.1 Test conditions 6.7.3.2 Connections
36	6.7.3.3 Test procedure 6.7.3.4 Method of temperature determination 6.7.3.5 Value of ambient temperature during test 6.7.3.6 Determination of the ambient temperature 6.7.3.6.1 Placing of measuring device 6.7.3.6.2 Ambient air temperature
37	6.7.4 Short-circuit withstand current tests 6.7.4.1 General 6.7.4.2 Test conditions
38	6.7.4.3 Peak withstand current tests for switched ways and bus
39	6.7.4.4 Peak withstand current test for fused ways, fused-switch ways, and fused-loadbreak ways that have shorting bars 6.7.4.5 Short-time withstand current tests 6.7.4.5.1.1 Short-time withstand current tests on fused ways, fused-switch ways and fused-loadbreak ways having shorting bars
40	6.7.4.5.2 Short-time withstand current tests on automatic fault interrupters used as switches 6.7.4.6 Rated fault-making current test 6.7.4.6.1 Test conditions 6.7.4.6.2 Rated fault-making current test with fuses 6.7.5 Switching tests 6.7.5.1 Power-frequency voltage measurements
41	6.7.5.2 Power-frequency current measurements 6.7.5.3 Single-phase testing 6.7.5.4 Load switching current tests
42	6.7.5.5 Loop switching current tests 6.7.5.6 Cable charging switching current test 6.7.5.7 Unloaded transformer switching current test
44	6.7.6 Thermal runaway test
45	6.7.7 Partial discharge tests 6.7.7.1 Test voltages and limits 6.7.7.2 Conditioning of test sample 6.7.7.3 Test equipment and procedure 6.7.7.4 Modular tests 6.7.8 DC withstand voltage test
46	6.7.8.1 Test procedure 6.7.8.1.1 Acceptance/failure criteria 6.7.9 Tightness test (sealed tank pressure test) 6.7.9.1 Internal pressure test procedure 6.7.9.2 External pressure test 6.7.10 Mechanical operations test 6.7.10.1 Mechanical operations tests following switching tests
47	6.7.10.2 Mechanical operations tests following short-circuit and thermal runaway tests 7. Production tests (routine tests) 7.1 Circuit resistance test 7.2 Power-frequency withstand voltage test 7.3 Partial discharge test 7.4 Leak test 7.5 Operating tests
48	8. Additional application and test requirements 8.1 Field tests on units in-service, including DC withstand tests on cables
49	8.2 Internal arc classifications 9. Design and construction 9.1 Grounding of switchgear 9.2 Independent manual operation 9.3 Position indication
50	9.4 Insulating medium quantity indicators 9.5 Drain and replacement provision 9.6 Sampling and adding provisions 9.7 Parking stands 9.8 Bushings 9.9 Enclosure construction—submersible and padmounted equipment
51	9.10 Enclosure construction—padmounted equipment security 9.11 Nameplates 9.12 User identification plate
52	10. Shipping requirements
53	Annex A (informative) X/R ratios A.1 Time constant (τcc) and X/R ratio A.2 Asymmetrical fault current
55	Annex B (informative) Bibliography
58	Back cover

Additional information

Standard Title	IEEE Standard Requirements for Subsurface, Vault, and Padmounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to 38 kV
Published Code	IEEE
Publication Date	2014

Preview PDF


PDF Format	Searchable	Printable	Preview Now

IEEE C37.74-2014

PDF Catalog

Related products