Name: IEEE C37.112-2018
Brand: IEEE
Price: 124.30 AUD

IEEE Standard for Inverse-Time Characteristics Equations for Overcurrent Relays

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

05-02-2019

Publisher

Institute of Electrical & Electronics Engineers

1 Overview
  1.1 Scope
  1.2 Purpose
2 References
3 Definitions
4 The time-current equation
  4.1 Coordination of inverse time-current characteristics
  4.2 The analytic equation
  4.3 Time dial
  4.4 Standard time-current characteristics
Annex A (Informative) - Derivation of the induction
                        characteristic
Annex B (Informative) - Bibliography

The scope of this standard includes the review of various existing analytic techniques used to represent relay operating characteristic curve shapes and proposes analytical (formula) representation of typical operating characteristic curve shapes to foster some standardization of available inverse-time relay characteristics provided in microprocessor or computer relay applications.

Committee	Power System Relaying and Control
DocumentType	Standard
ISBN	978-1-5044-5351-6
Pages	25
PublisherName	Institute of Electrical & Electronics Engineers
Status	Current
Supersedes	IEEE C37.112-1996

IEEE C37.90-2005	IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus
IEC 60255-3:1989	Electrical relays - Part 3: Single input energizing quantity measuring relays with dependent or independent time