T/CEEIA 331-2018 Abolished Group standards

T/CEEIA 331-2018 The general requirements for a residual current operated protective device used in a DC system

Publish Date: 2018-12-24 Implement Date: 2018-12-24 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CEEIA 331-2018

Standard Type: Group standards

Standard Status: Abolished

is_force_gb: no

CCS Name: Low-voltage distribution electrical equipment

ICS Name: Fuses and other overload protection devices

Publish Date: 2018-12-24

Implement Date: 2018-12-24

Scope

Scope: This standard sets out the minimum general requirements, recommendations, and information for the drafting and testing procedures of the standard for 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 standard can also be used as a guideline for DC-RCDs with a voltage not exceeding 1,500 V DC. This standard is primarily used as a reference for drafting safety standards for DC-RCD products. This standard cannot be used independently, but can be used by technical committees to draft product standards with a similar scope to this standard. This standard applies to: - Detecting residual current; - Comparing it with a reference value; and - Disconnecting contacts or poles of the device when the residual current exceeds this reference value. This standard also includes combination devices, each of which performs one or two of the above functions separately, but works together to complete all three functions. Note 2: RCMs (residual current monitors compliant with IEC 62020) only monitor electrical devices but do not provide protection and are not included in this standard, nor are they considered similar or equivalent products to DC-RCDs. DC-RCDs are intended to provide fault protection. According to IEC 60364-4-41, devices with exposed conductive parts must be connected to a suitable grounding electrode. DC-RCDs with a rated residual tripping current not exceeding 80 mA can also provide additional protection in the event of a failure of electrical 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 not suitable for IT systems, DC-RCD