ABB MNS2.0 Cooperated Low Voltage Switchgear Electric Panel

ABB MNS2.0 cooperated low voltage withdrawable switchgear.

● Model: ABB MNS2.0

● Name: AC low voltage withdrawable switchgear 

● Rated frequency: AC 50Hz / 60Hz;

● Rated voltage (Ue): 400V;

● Rated insulation voltage(Ui): 690V;

● Horizontal Busbar Rated current (Ir): 6300A;

● Vertical Bus Rated current (Ir): 2000A;

● Horizontal Busbar Short time withstand current (Icw) (4s): 100kA;

● Vertical Bus Short time withstand current (Icw) (4s): 80kA;

● Functional units: withdrawable;

● Protect Degree: IP30~ IP54;

● Standard: IEC62271-200;

● Dimension: 2200H *400/ 600/ 800/ 1000/ 1200W *800/ 1000/ 1200D (mm)

1. Overview

MNS 2.0 low voltage switchgear is developed by ABB

Developed, representing the international advanced level of low-voltage switch

Close the cabinet. For all generation, distribution and power

Occasion of use. In 2006, abb sent

The overall technology of MNS 2.0 low-voltage switchgear is carried out

Technology transfer, including design, manufacturing and quality

Control and detection.

2. Reference standards and specifications

MNS 2.0 switchgear is designed and manufactured in accordance with the following standards.

Gb7251.1-2005 low voltage complete switchgear

Zbk36001-89 low voltage withdrawable complete switchgear

Gb4720 low voltage electrical control equipment

Gb9466-88 Basic test method of low voltage switchgear

Gb9466-88 Basic test method of low voltage switchgear

Gb50150-91 electrical equipment exchange test standard for electrical equipment installation engineering

Gb50168-92 code for construction and acceptance of cable line of electrical equipment installation engineering

Iec439-1 low voltage switchgear and control equipment

All the above specifications and standards are valid versions.

3. Technical data

● environmental conditions:

Installation location: Indoor

Altitude: below 1000M

Ambient temperature: - 15 ℃ - + 45 ℃

Maximum daily temperature: + 35 ℃ (24-hour average)

Maximum daily temperature difference:<15K

Maximum relative humidity: 95% (daily average)

90% (25 ℃) (monthly average)

Earthquake resistance: the intensity of resistance shall not exceed 8 degrees

Air pollution degree: slight pollution

● basic parameters of switchgear

1) Rated operating voltage: 400VAC

2) Rated insulation voltage: 660vac

3) Rated impulse withstand voltage: 8Kv

4) Rated working current:

Horizontal main bus ≤ 5000A

Vertical bus ≤ 1250A

5) Working frequency: 50Hz

5) Rated short-time withstand current of main bus: ≤ 80kA

6) Rated peak withstand current of main bus: ≤ 175ka

7) Rated short-time withstand current of vertical bus: ≤ 50kA

8) Rated peak withstand current of vertical bus: ≤ 105kA

9) Power frequency withstand voltage: 2500v-1min

10) Boundary dimension: (mm) height 2200

Width 600-800-1000-1200

600-800-1000-1200 deep

11) Protection grade: ip30-ip54 (selected according to requirements)

4. Framework

The system frame of MNS 2.0 low-voltage switch cabinet is C-frame with 25 mm interval modulus hole. The connection of the frame structure is assembled with international advanced self tapping screws. All frame parts are maintenance free.

MNS 2.0 switchgear is highly modular with standard module e = 25 mm. Because the frame adopts 25 mm module hole system, the frame structure can be assembled into various types of cabinets without special tools.

Each switch cabinet is based on a complete set of cabinet frame, and the vertical and horizontal partitions are fixed with bolts. The whole cabinet is fixed on a single base to form a stable self-supporting system, which will not be damaged by vibration.

Cabinet can be divided into: device compartment, bus compartment, cable compartment.

5. Surface treatment

The surface treatment is carried out by the spray line imported from the United States through the processes of pre degreasing - degreasing - Pickling - phosphating - warm water cleaning - pure water cleaning - drying - electrostatic powder spraying - curing, etc., so as to achieve the modular, solderless, acid resistant, rust proof and beautiful effect of the switch cabinet shell. The salt fog resistance is more than 1500 hours.

6. Shell

The hinge frame can be used for the installation of electronic devices and instrument panel, as well as the device frame. The bottom of the switch cabinet is provided with a base plate, and the cable trough can be installed after the flange plate is added. The door panel and housing can be equipped with single / multiple vents.

According to different requirements, the frame can be divided into device chamber, bus chamber and cable compartment.

In the device compartment, there are functional unit components, bus and distribution bus in the bus compartment, and in the cable compartment, there are incoming and outgoing cables (both upper and lower incoming and outgoing lines are allowed), connecting wires and accessories between the functional unit components (such as cable clamps, cable connectors, parallel wires, wiring ducts, etc.).

The functional units and the small rooms in the cabinet can be separated, and the internal separation can reduce the arc damage to a minimum.

7. Bus, protective conductor and secondary connection

The busbar, protective wire and neutral wire are made of copper busbar.

·Main bus system

The main bus of MNS 2.0 switchgear is installed in the bus compartment behind the switchgear. It can be divided into two layers. The double-layer main bus system is respectively placed in the upper and lower layers, and the single-layer main bus system can be placed in the upper or lower layers. The cross section size of the two main buses can be different. The main bus can be connected separately, in series or in parallel. The busbars of different sections can also be connected. The main bus of MNS 2.0 switch cabinet arranged in back-to-back design adopts common bus design, which is composed of two buses.

·Distribution bus system:

The distribution bus is used for the connection between the functional unit components and the bus, which is vertically distributed in the bus compartment. One MNS 2.0 switchgear can be installed with two 3-phase or 4-phase distribution buses at most, which can be divided into two sections with full height, half height and middle.

The vertical bus is L-type copper bus, which is embedded in the functional wall made of flame-retardant plastic. Together with the whole bus system, it can meet the requirements of anti electric shock protection grade (IP20) without additional partition.

The multi-functional partition has the function of anti fault arc, and can also be used as the isolation between the device compartment and the bus compartment.

·Protective conductor

MNS 2.0 switchgear can be arranged as 4-wire or 5-wire bus system. In addition to the main bus and distribution bus, the 4-wire system also includes protective neutral wire (pen), and the 5-wire system includes protective earth wire and neutral wire (PE + n).

The protection / neutral connection of the system connection is horizontally installed in the device chamber and the power supply