MNS Low Pressure Draw-out Switch Cabinet
MNS low voltage drawer type switchgear is suitable for power conversion, distribution and control of power distribution systems with a rated voltage below 690V and 50-60Hz. It is mainly used in airports, power plants, substations, petrochemicals, metallurgical steel, transportation and energy,...
Description
MNS low voltage drawer type switchgear is suitable for power conversion, distribution and control of power distribution systems with a rated voltage below 690V and 50-60Hz. It is mainly used in airports, power plants, substations, petrochemicals, metallurgical steel, transportation and energy, light industry and textile enterprises, residential areas, high-rise buildings and other places.
Main feature:
● The main frame of MNS low pressure draw-out switch cabinet is molded by pressing C-type aluminum-zinc sheet metal forming, is whole assembly structure. Structure is compact, can operate on the positive side, also can be on the opposite side, protective level of casing is IP3X.
● Each function chamber is isolated from each other, divided into function unit chamber, bus-bar chamber and cable chamber. The role of each chamber is relatively independent.
● Horizontal main bus-bar adopts “laid flat after cabinet ”arrangement method, to enhance the ability of bus-bar’s anti-electric, then aid the main power lines gain the capability of bearing high short-circuit strength.
● Drawers can be designed to 1/4 、1/2、1、2、3, these five standard drawer unit, drawer unit is equipped with mechanical interlock devices. Use high-strength flame- retardant engineering plastics to form, with high security.
Switch cabinet has two outlet types: right outlet and rear outlet
● Don’t need special、complicated tools, easy to install
Details of MNS low pressure draw-out switch cabinet:
Serial number | Name | Unit | Value |
1 | Rated working voltage | V | 380/690 |
2 | Rated insulation voltage | V | 660/1000 |
3 | Rated frequency | Hz | 50 |
4 | The main busbar rated current | A | ≤6300 |
5 | The main busbar rated short-time withstand current（1S） | kA | ≤100 |
6 | Rated peak tolerance current | kA | 220 |
7 | Rated current of distribution bus | A | ≤1250 |
8 | Rated short-time tolerance current of distribution bus（1S） | kA | ≤50 |
9 | Peak tolerance current of distribution bus | kA | 105 |
10 | Auxiliary circuit insulation voltage | V | 660 |
11 | Rated impact tolerance voltage | kV | 6 |
12 | Shell protection grade | IP | to IP40 |
13 | Electrical gap | mm | ≥ 8 |
14 | Creeping distance | mm | ≥12.5 |
15 | Overvoltage category | Ⅲa | |
16 | Class of pollution | 3 |
Normal operational conditions
1, surrounding air temperature
Up limit +40°C (the average value measured over 24h does not exceed 35 ℃)
Lower limit -45°C
2, altitude
not higher than 2500m
3, humidity
the average relative humidity measured over 24h does not exceed 90%;
the average value of water vapor pressure measured over24h does not exceed 2.2kPa;
average monthly relative humidity less than 90%;
the average monthly water vapor pressure not exceeding 1.8kPa.
4, surrounding air is not significantly polluted by dust, smoke, corrosive or flammable gas, vapors or fumes.
5, earthquake intensity does not exceed 8 degrees
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