high-and low-voltage switch cabinet
Devices for use in low voltage distribution system in power plant, substation, petroleum chemical industry, industrial and mining enterprises, high-rise buildings and other power, distribution, motor control center and capacitor compensation of electric energy conversion, divided into basic and control.
In large unit capacity of the power plant, large-scale petrochemical industry low voltage power control center and center of motor control and motor control center power to use the occasion to meet with the special needs of the computer interface.
Device is the root according to the power of the Department of power, the majority of users and the requirements of the Department, in order to meet the continuous development of the power market, the special needs of the computer interface.
Device is according to the electric power department supervisor, vast power users and design requirements of juice sector, to meet the continuous development of the electricity market for centralized control of compatibilization, computer interface, power, by the force of the installation and maintenance, shorten the time of accident handling needs, Feng safety, economy, synthetic principle, reliable principle design new type low voltage switch cabinet, the product has breaking, connect high ability, dynamic thermal stability, electrical scheme is flexible, convenient combination, series of practical strong, novel structure, protection grade high can do for the low-voltage drawer type switch cabinet replacement product.
Device symbol IEC439-1 "low-voltage switchgear assembly did not prepare and control", GB7251 "low-voltage switchgear equipment," and so on.
Electrical properties
Basic electrical parameters
- rated insulation voltage of AC 660 (1000) V
T - the rated voltage of the main circuit of AC 380 (660) V
The auxiliary circuit of AC 380, 220V
DC 220, 110V
The rated frequency of 50 (60) Hz
The level busbar rated current is less than or equal to 4000A
The vertical busbar rated current 1000A
The rated peak withstand current (0.1 s 105), 176kA
In fact, the short-time withstand current (lS) 50, 80kA