GB/Z 40680-2021 Active National standards

GB/Z 40680-2021 General requirements for residual current operated protective devices for D.C. system

Publish Date: 2021-10-11 Implement Date: 2022-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/Z 40680-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Low-voltage distribution electrical equipment

ICS Name: Fuses and other overload protection devices

Publish Date: 2021-10-11

Implement Date: 2022-05-01

Pages: 34 pages

Scope

This document sets out the minimum general requirements, recommendations, and information for the drafting and testing procedures of residual current protection devices (hereinafter referred to as DC-RCDs) intended for use in DC systems with a rated voltage not exceeding 400 V DC and a rated current not exceeding 125 A.
Note 1: This document can also serve as a guide for DC-RCDs with a voltage not exceeding 1,500 V DC.
This document is primarily used as a reference for drafting safety standards for DC-RCD products.
This document cannot be used independently, but it can be used by technical committees to draft product standards with a scope similar to that described in this document.
This document applies to devices that can detect residual current, compare it with a reference value, and disconnect contacts or poles when the residual current exceeds this reference value.
This document also includes combination devices, each of which performs one or two of the above functions, but work together to complete all three functions.
Note 2: RCM (residual current monitors in accordance with IEC 62020) only monitors electrical devices but does not provide protection, and is not included in this document, nor is it considered a similar or equivalent product of DC-RCDs.
According to IEC 60364-4-41, after the exposed conductive parts of the device are connected to a suitable grounding electrode, DC-RCDs are intended to provide fault protection.
DC-RCDs with a rated residual tripping current not exceeding 80 mA can also provide additional protection in the event of the failure of electric shock protection measures.
According to IEC 60364-4-42, residual current devices with a rated residual tripping current not exceeding 300 mA can also provide protection against the fire hazard caused by continuous ground fault current.
DC-RCDs are suitable for isolation. Except for single-pole DC-RCDs with two current loops, which are n

Development Information

Word Count: 67 Thousand words Pages: 34 pages

Referenced Standards

GB/T 2423.4-2008 Environmental testing for electric and electronic products—Part 2:Test method—Test Db:Damp heat,cyclic(12 h+12 h cycle) GB/T 16895.21-2011 Low-voltage electrical installations—Part 4-41:Protection for safety—Protection against electric shock IEC 60664-1 IEC 61000-4-2 IEC 61000-4-3 IEC 61000-4-4 IEC 61000-4-5 IEC 61000-4-6 IEC 61000-4-16 IEC 61000-4-17 IEC 61000-6-1 IEC 61000-6-2 IEC 61000-6-3 IEC 61000-6-4 IEC 61140 IEC 61543:1995+AMD1:2004+AMD2:2005 IEC 62873-2