GB/T 41135.1-2021 Current and voltage sensors or detectors,to be used for fault passage indication purposes—Part 1:General principles and requirements
GB/T 41135.1-2021 Current and voltage sensors or detectors,to be used for fault passage indication purposes—Part 1:General principles and requirements
Basic Information
Scope
This document specifies the minimum requirements (i.e., minimum performance indicators) and corresponding classifications and tests (except for functional tests and communication tests) for fault path indicators and distribution units.
This document applies to fault path indicators (FPI) and distribution units (DSU) (including current and/or voltage sensors of FPI and DSU). FPI and DSU are single devices or combinations of multiple devices/functions that can be used to detect faults and indicate their locations.
Note 1: Fault location refers to the position relative to the installation point of FPI/DSU in the power grid (upstream or downstream of the FPI/DSU location) or the direction of the fault current passing through FPI/DSU. Considering the characteristics and operating conditions of the power system equipped with FPI/DSU, the fault location can be:
——directly derived from FPI/DSU; or
——derived from a centralized system that uses more FPI or DSU information.
Note 2: This document details the classification of FPI/DSU according to the first "core" classification principle defined in GB/T 41135.2. Considering the structure and fault types of the most widely distributed distribution systems, GB/T 41135.2 comprehensively describes the electrical phenomena and power system responses in faults. Therefore, GB/T 41135.2 mainly helps users correctly select FPI and DSU, while this document focuses on the general principles and requirements of FPI and DSU.