General
MNS LV withdrawable switchgear (hereinafter referred to as device) is
manufactured by standard module through consulting MNS series low
voltage switch cabinet of Switzerland ABB Company, and synthetically
improved. The device is applicable to the system with AC 50Hz, rated
working voltage 660V and below, used as control device for various power
generation, transmission, distribution, power transfer and power consump
tion device. It is widely used in low voltage distribution system of various
mining enterprise, tall building and hotel, municipal construction etc. Be
sides the general land use, after special disposal, it also can be used for
marine petrol drill taken platform and nuclear power station.
The device accords with international standard IEC439-1 and national
standard GB7251.1.
Characteristics
1. Compact design: Contain more function units with less space.
2. Strong versatility for structure, flexible assembly. C type bar section of 25mm
modulus can meet the demands of various structure and type, protection grade and
operating environment.
3. Adopt standard module design, can be 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.
4. Fine security: Adopt high strength antiflaming type engineering plastic pack in
large quantity to effectively enhance the protective safety performance.
5. High technical performance: Main parameters reach the advanced level at home.
Main technical parameters
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.
Conditions for normal operating environment
1. Ambient air temperature: -5~+40 and the average temperature should not
exceed +35 in 24h.
2. 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.
3. Altitude above sea level should not exceed 2000M.
4. 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 cant recover, and it can works
normally under normal conditions.
5. If the above operating conditions not meet users demand. Consult with
manufactory.
6. Technical agreement should be signed additionally if the device is used for marine
petrol drill taken platform and nuclear power station.
Structure characteristics
The basic cabinet of device is combined assembly structure. Basic structural pieces of cabinet is zinc
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 project, 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 unit e=25mm).
Interior structure
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