Overview
MNS low-voltage draw-out switchgear (hereinafter referred to as the switchgear) is a product manufactured by referring to MNS series lowvoltage switchgear of ABB Company of Switzerland and using standard modules after comprehensive improvement. This device is suitable for systems with AC 50Hz and rated working voltage of 660V and below. As the control equipment of various power generation, transmission, distribution, power conversion and power consumption equipment, it can be widely used in low-voltage distribution systems such as industrial and mining enterprises, buildings, hotels and municipal construction. Besides general land use, it can also be used in offshore oil drilling and production platforms and nuclear power plants after special treatment.
The equipment conforms to international standard IEC439-1 and national standard GB7251.1.
Main feature
◇ Compact design：Contain more function units with less space；
◇ Strong versatility for structure，fiexible assembly.C type bar section of 25mm modulus can meet the demands of various structure and type, protection grade and operating environment；
◇ Adopt standard module desien, can he combined into protection operation，transfer, control,regulation, measurement,indication etc such standard units.User can choose assembly according to requirement at will. Cabinet structure and drawer unit can be formed with more than 200 components；
◇ Fine security: Adopt high strength antiflaming type engineering plastic pack in large quantity to effectively enhance the protective safety performance；
◇ High technical performance: the main parameters have reached the domestic leading level.
Rated working current of vertical bus bar:
Draw-out type MCC with single side or double sides operation: 800A. MCC with 1000mm depth and single operation: 800~2000A.
Use environmental conditions
◇ Ambient air temperature:-5℃ -+40℃ and the average temperature ≤ +35℃ in 24h；
◇ Air condition: With clean air. Relative humidity should not exceed 50% at+40℃ . Higher relative humidity is allowed at lower temperature. Ex.90% at+20℃ . But in view of the temperature change, it is possible that moderate dews will produce casually；
◇ Altitude above sea level should not exceed 2000M；
◇ The device is suitable to the transportation and store with following temperature-25℃ ~+55℃， in short time (within 24h) it reaches +70℃ .Under the limiting temperature, device should not suffer damage that can't recover,and it can works normally under normal conditions.Not suffer damage that can't recover, and it can works normally under normal conditions;
◇ If the above operating conditions not meet user's demand. Consult with manufactory;
◇ Technical agreement should be signed additionally if the device is used for marine petrol drill taken platform and nuclear power station.
Structural features
The basic cabinet of device is combined assembly structure. Basic structural pieces of cabinet is zine plated, connected and firmed into basic bracket through self tapping locking screw or 8.8 grade square corner screw. According to the change demand of proiect, additionally add corresponding gate,closing board,baffle plate, installation support and the components of bus bar, function units, to assemble a complete set of device. Perform modulus to interior component and compartment size (Modulus unite-25mm).
