IEEE C37.17-2022

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IEEE Standard for Trip Systems for Low-Voltage (1000 V and below) AC and General Purpose (1500 V and below) DC Power Circuit Breakers (Published)

Published By	Publication Date	Number of Pages
IEEE	2022

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Description

Revision Standard – Active. This standard pertains to the requirements for current and voltage protective functions of 1) direct-acting overcurrent electromechanical trip devices, 2) direct-acting overcurrent electronic trip systems, 3) reverse-current trip systems, and 4) undervoltage trip devices that are integral with low-voltage ac (1000 V and below) and general-purpose low-voltage dc (1500 V and below) power circuit breakers covered by IEEE Std C37.13 and IEEE Std C37.14. Additional information, communication, and/or additional internal or external protective functions or devices are not covered by this standard. This standard should not be interpreted to restrict the inclusion of such functionality in the device.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C37.17™-2022 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
10	Introduction
11	Contents
13	1. Overview 1.1 Scope 1.2 Word usage
14	2. Normative references 3. Definitions
16	4. Preferred trip device current ratings or settings (amperes) 5. Trip system self-monitoring 5.1 General
17	5.2 Trip system health indication 5.3 Trip actuator circuit integrity 5.4 Current sensing circuit integrity 6. Types and response of direct-acting overcurrent trip functions 6.1 General 6.2 Long-time delay 6.3 Short-time delay 6.4 Instantaneous
18	6.5 Neutral overload 6.6 Ground fault 6.7 Functions modifying the response of direct-acting overcurrent trip functions
19	7. Requirements for direct-acting overcurrent trip functions 7.1 General 7.2 Long-time delay trip functions (electromechanical devices only) 7.3 Long-time delay trip functions (electronic devices only) 7.4 Short-time delay trip functions 7.5 Instantaneous trip functions (low range electromechanical devices only)
20	7.6 Instantaneous trip functions (electronic devices only) 7.7 Neutral overload functions 7.8 Ground fault trip functions 8. Delay times of direct-acting overcurrent trip functions 8.1 Long-time-delay trip functions 8.2 Short-time-delay trip functions 8.3 Short-time-delay ground fault trip function 9. Reverse-current trip devices for general purpose dc circuit breakers 10. Undervoltage trip devices 10.1 General
21	10.2 Drop-out voltage range 10.3 Pickup or seal-in voltage 10.4 Maximum operating voltage 11. Tests 11.1 General 12. Software process verification
24	Annex A (informative) Time-overcurrent characteristics A.1 Sample phase time-overcurrent characteristics and tolerance bands
25	A.2 Sample ground time-overcurrent characteristics and tolerance bands
26	A.3 Diagram clarifying Table 3
27	Annex B (informative) Arc flash mitigation or energy reduction integral to the trip system
28	Annex C (informative) Use of trip systems not originally supplied/offered/qualified with the breaker by the original circuit breaker manufacturer
29	Annex D (informative) Definitions preserved for historical continuity
30	Annex E (informative) Bibliography
31	Back cover

Additional information

Standard Title	IEEE Standard for Trip Systems for Low-Voltage (1000 V and below) AC and General Purpose (1500 V and below) DC Power Circuit Breakers (Published)
Published Code	IEEE
Publication Date	2022

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IEEE C37.17-2022

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