T/WZSSTI 006-2025 Low-voltage distribution panel operated by general personnel (performance improvement technical specification) with integral switchgear and control equipment

Scope

This section defines the specific requirements for distribution boards (DBOs) operated by ordinary personnel. DBOs must meet the following conditions: — They are intended to be operated by ordinary personnel (e.g., for switching operations and fuse replacement), such as in civilian (domestic) applications; — The outgoing circuits include protective devices that comply with the following standards, such as IEC 60898-1, IEC 61008, IEC 61009, IEC 62423, and IEC 60269-3; — The rated voltage to ground does not exceed AC 300V; — The rated current of the outgoing circuits (Inc) does not exceed 125A, and the rated current of the DBO (InA) does not exceed 250A; — They are intended for power distribution; — They are enclosed and installed in a fixed manner; — They are used indoors or outdoors by users. DBOs may include control and/or signaling devices related to power distribution. This section applies to all DBOs, whether they are designed, manufactured, and verified on a one-time basis or are fully standardized for mass production. DBOs may be assembled outside the original manufacturer's factory. This section does not apply to individual devices and complete components that comply with their respective product standards, such as circuit breakers, knife-fuse switches, electronic devices, etc. This section does not apply to specific types of complete equipment included in other parts of GB/T 7251.

Development Information

Related Standards