1. The maximum rated current of the main bus: the rated value of the maximum current that the main bus can carry.
2. Rated short-time withstand current: given by the manufacturer, the root mean square value of the short-time withstand current that a circuit in the complete equipment can be safely carried under the test conditions specified in 8.2.3 of the national standard GB7251.1-2005 .
3. Peak short-time withstand current: Under the specified test conditions, the manufacturer specifies the peak current that this circuit can withstand satisfactorily.
4. Enclosure protection level: according to the IEC60529-1989 standard provided by the complete set of equipment to prevent contact with live parts, as well as the invasion of foreign solids and the level of liquid entry. See the IEC60529 standard for the specific grade division.
5. Internal separation method: According to the IEC60529-1989 standard, in order to protect personal safety, the switchgear is divided into several compartments in different ways. The technical parameters of different types of distribution cabinets are very different, and the technical parameters of imported distribution cabinets are basically better than domestic distribution boxes, but it cannot be considered that imported distribution cabinets must be better than domestic distribution cabinets.
Post time: May-19-2022