T/CEEIA 470-2020 The method of testing the action characteristics of the DC system residual current detection module

Scope

Scope: This document specifies the general requirements for conducting action characteristic verification tests on residual current detection modules (hereinafter referred to as "DC-RCDU") intended for use in DC systems with a rated voltage not exceeding 1000 V DC and a rated current not exceeding 63 A. Note: This document also provides guidance for action characteristic verification of DC-RCDUs with a rated voltage not exceeding 1500 V DC. The DC-RCDU specified in this document refers to a module unit capable of detecting DC residual current, comparing the residual current with a reference value, and providing an action output or signal output when the residual current exceeds this reference value. It can be used in conjunction with mechanical switchgear to protect circuits. This document is also applicable to other detection modules or devices with multiple functions (including at least the residual current detection function) for testing and verifying the action characteristics of DC residual current. Main technical content: This document specifies the general requirements for conducting action characteristic verification tests on residual current detection modules (hereinafter referred to as "DC-RCDU") intended for use in DC systems with a rated voltage not exceeding 1000 V DC and a rated current not exceeding 63 A. Note: This document also provides guidance for action characteristic verification of DC-RCDUs with a rated voltage not exceeding 1500 V DC. The DC-RCDU specified in this document refers to a module unit capable of detecting DC residual current, comparing the residual current with a reference value, and providing an action output or signal output when the residual current exceeds this reference value. It can be used in conjunction with mechanical switchgear to protect circuits. This document is also applicable to other detection modules or devices with multiple functions (including at least the residual current detection function) for testing and veri

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