Low Voltage Draw Out Switch Cabinet

The products are composed of standardized and series of modules, and the drawers have reliable mechanical interlocking devices, which make users safer and more reliable when using them.

Keywords:

Low Voltage Distribution Cabinet

Classification:

Low Voltage Distribution Cabinet

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Product Introduction

The MNS type low-voltage pull-out switch cabinet (hereinafter referred to as the switchgear) was developed by our company after referring to the MNS series of low-voltage switch cabinet of the Swiss ABB company and comprehensively improving it. It is currently a relatively complete low-voltage pull-out switchgear in China. The products are composed of standardized and series of modules, and the drawers have reliable mechanical interlocking devices, which make users safer and more reliable when using them.

This cabinet is suitable for AC 50 (60) Hz, rated operating voltage 400V, 660V. A three-phase five-wire power supply system with a rated current of 5000A and below can be used in power plants, substations, industrial and mining enterprises, buildings, hotels, airports, docks, radio and television and other communication centers to control power generation, transmission and distribution, power conversion and power consumption equipment, and its main busbar is compensated for reactive power through a capacitor compensation cabinet. Comply with standards: GB7251.1 "Low-voltage switch cabinet" IEC60439 "Low-voltage switch cabinet and control equipment"

Model Meaning

huaxing

Working Conditions

● The surrounding air temperature is not higher than +40℃, not lower than -5°℃, and the average temperature within 24h is not higher than +35℃；

● The relative humidity of the surrounding air does not exceed 50% at the highest temperature of +40℃, and there is a higher relative humidity at lower temperatures, such as 90% at +20℃, but considering that due to temperature changes, moderate condensation may occur occasionally.；

● For indoor use, the altitude of the place of use shall not exceed 2000m；

● It should be installed in a place where there is no severe vibration and shock, and where electrical components are not corroded.

Main Technical Parameters

NO.	Name		GB7251.1-2005 low voltage switchgear and control equipment (TTA)
NO.	Name		IEC60439 "Low Voltage Switchgear and Control Equipment"
1	Overvoltage category		IV Ⅲ
2	Pollution level		3
3	Rated operating voltage(Ue)(V)		400/660
4	Rated insulation voltage(Ui)(V)		660/1000
5	Rated frequency(Hz)		50(60)
6	Horizontal busbar	Rated current	≤ 5000A
7		Rated short-term withstand current(lcw)(kA)	50、65、80(1s valid value)
8		Rated peak withstand current(lpk)(kA)	105、140、176(0.1s maximum value)
9	Vertical busbar	Rated maximum operating current	≤1000A
10		Rated short-term withstand current	50kA
11		Rated peak withstand current	105kA
12	Shell protection level		IP30 IP40(Special instructions)

Structural Features

Due to the introduction of the excellent technology of Swiss ABB, this switchgear has been technically improved on the basis of its original technology to make it more in line with our country's national conditions. The cabinet adopts 25mm modular C-profile through connecting parts to form a variety of cabinet frame structures and drawer units that can meet various needs. High-strength flame-retardant engineering plastic components are used in the MCC cabinet to make its safety performance more reliable. At the same time, the foreign function board is modified to be combined with 200mm as the modulus, which is more conducive to the design requirements of the PC cabinet and the MCC cabinet mixed cabinet. The drawer unit and the cabinet have a reliable interlocking device to prevent the switch from being turned on with a load, which improves its safety. In addition, the cabinet Generally, cold-rolled steel plates are assembled after passivation treatment, and aluminum-zinc steel plates can also be used according to the different needs of users.

● Switch cabinet type

◇ Receiving power, female cabinet

Various types of frame circuit breakers at home and abroad such as RMW1, CW1, NA1, DW45, CDW7, MT, E and other series of circuit breakers are used as the main switch to realize the function of receiving power or female connection.

◇ Power center cabinet (PC)

Various types of cabinet-mounted circuit breakers such as DW45, NA1, CDW7MT, and E series circuit breakers at home and abroad are used for power distribution.

◇ Motor Control Center (MCC)

It is assembled from large and small drawers, and the main switch of each circuit adopts a plastic case circuit breaker with high breaking capacity or a rotary load switch with a fuse.

◇ Reactive power compensation cabinet

● Drawer type

There are five sizes, all of which are designed with a modular structure at a height of 8E (200mm), and the effective component installation height is 1800mm, which makes the overall layout of the cabinet more reasonable and beautiful.

8E/4: Height 200×width 150×depth 400 height space parallel combination of 4 drawer units

8E/2: Height 200×width 300×depth 400 height space parallel combination of 2 drawer units

8E: Height 200×width 600×depth 400 height, space to assemble 1 drawer unit

16E: Height 400×width 600×depth 400 height, space to assemble 1 drawer unit

24E: Height 600×width 600×depth 400 assemble 1 in 24E (600mm) height space

Company Strength