IEEE C37.17:2022

Abstract: 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.

Keywords: direct-acting trip, ground fault, i2t, i-squared-t, IEEE C37.17, instantaneous, long-time, low-voltage power circuit breaker, power system protection, short-time, time-overcurrent, trip device, trip unit

Multimedia: N

Subscription Package: Power Switchgear, Circuits and Fuses

IEEE Normative references: 1012-2016, C37.13-2015, C37.14-2015, C37.20.10-2016

Non-IEEE Normative references: ANSI C37.50, American National Standard for Switchgear--Low-Voltage AC Power Circuit Breakers Used in Enclosures--Test Procedures.

UL 489, Supplement SE, Molded-Case Circuit Breakers and Molded-Case Switches with Software in Programmable Components.

Life Cycle: Revision of IEEE C37.17-2012

Publication Type: IEEE Standard

Publication Date: 2023-02-17

Page Count: 31

Committee/Society: IEEE Power and Energy Society/Switchgear