Product Overview

MNS is a modular, multi-functional low-voltage distribution cabinet. It is used in low-voltage systems requiring high reliability across various industries and infrastructure sectors, including metallurgy, oil, chemical processing, industrial and mining enterprises, as well as critical infrastructure—particularly for power distribution and motor control systems.

The cabinet structure adopted by MNS offers a high degree of flexibility.

Depending on customer needs or different application scenarios, various models and specifications of components can be installed inside the cabinet.

Depending on Xiaotong's electrical equipment, various types of feeder units can be installed in the same cabinet or even within the same enclosure. For example, feeder circuits can be combined with motor control circuits in a single setup.

MNS is a comprehensive range of low-voltage switchgear designed to meet all your needs. It’s suitable for use in all low-voltage systems rated up to 6300A.

MNS delivers high-level reliability and safety: its user-friendly design enhances the protection needed for both personal and equipment safety.

The MINS features a fully assembled structure, with its unique profile design and connection method, as well as compatibility with various components, enabling it to meet demanding project timelines and ensure uninterrupted power supply.

Implementation standards: IEC60349, GB7251.12-2013.

Normal operating conditions

● Application scenarios: Power distribution, motor control.

● Standards complied with: IEC 60349, GB 7251.12-2013.

● Ambient temperature: -5°C to 40°C.

● Relative ambient humidity: Not exceeding 50% at 40°C; however, higher relative humidity levels are permissible at lower temperatures, with occasional condensation potentially occurring (e.g., up to 90% at 20°C).

● Installation location: Indoor.

● Altitude: ≤2500m.

●If the above conditions cannot be met, the user should notify the manufacturer at the time of ordering.

Ordering Instructions (Please specify when placing your order)

1. Main circuit scheme number, purpose, single-line system diagram, arrangement drawing, and distribution room layout plan, etc.

2. Schematic diagram of the auxiliary circuit wiring and terminal arrangement diagram.

3. Model, specifications, and quantity of electrical components within the switchgear.

4. Requirements for control, measurement, and protection functions of switching equipment, as well as requirements for other interlocking and automatic devices.

5. If bus bridges are required to connect switchgear units or incoming feeder cabinets, please provide specific data such as the rated current-carrying capacity of the bus bridge, its span length, and the height from the ground.

6. When attachments or spare parts are needed, please specify the type and quantity required.

7. If switchgear is to be used in special environmental conditions, please provide detailed specifications when placing your order.

Technical specifications

1.1 Incoming and outgoing line configuration: Cable/Busway (Bridge)

1.2 Cable entry/exit: Top/Bottom

1.3 Wiring Configuration: Front of Cabinet / Back of Cabinet

1.4 Protection Ratings: IP30, IP40, IP54

1.5 Functional Unit Isolation Modes: Full Isolation or Partial Isolation

2 Cabinet Dimensions

2.1 Height: 2200

2.2 Widths: 600, 800, 900, 1000

2.3 Depth: 600, 800, 1000

2.4 Surface Treatment: High-Voltage Electrostatic Epoxy Powder Coating >60μ

3 Electrical Data

3.1 Rated Insulation Voltage: Up to 1000V

3.2 Rated Operating Voltage: Up to 660V

3.3 Rated Frequency: 50/60 Hz

3.4 Rated Impulse Withstand Voltage: 8kV

3.5 Auxiliary circuit rated voltage: AC 380 V, 220 V / DC 220 V

3.6 Overvoltage Category: III

3.7 Pollution Level: 3

3.8 Rated Current: 6300A

3.9 Rated Current of the Horizontal Busbar: 6300 A

3.10 Vertical busbar rated current: 2000A, 1000A

4 Horizontal Busbars

4.1 Rated Short-Time Withstand Current: 50/80 kA

4.2 Rated Peak Withstand Current: 105/176 kA

5 Vertical Busbars

5.1 Rated Short-Time Withstand Current: 50 kA

5.2 Rated Peak Withstand Current: 105 kA

6 Earthing systems: TT, IT, TN-S, TN-C-S

7 Main In/Out Feeder Circuit Breakers: 4000A

*1. Cabinet with glass doors must have a minimum depth of 725 mm.

2. To facilitate the installation of horizontal busbars, the cabinet depths should be standardized within systems arranged in the same configuration. If standardization is not possible, a 400-wide busbar transfer cabinet should be added at each connection point.

3. For cabinets equipped with busbar bridges or busbar trunking systems for incoming and outgoing lines, the depth should be 800 mm. For products with special requirements, please consult the manufacturer.

Key Features

1. To facilitate equipment installation and on-site construction, the distribution cabinet is equipped with dedicated cable channels, complete with corresponding cable fixings.

2. The drawer units are accurately positioned at each location, clearly marked for identification, and can each accommodate up to 3 padlocks for secure locking.

3. The special profile structure and connection method ensure the cabinet's strength.

4. The drawer unit features direct plug-in connections between the contact wires and the "L"-shaped vertical busbar, ensuring simplicity and reliability.

5. A unique 3-section rail system ensures smoother, more flexible drawer movement, allowing easy access for inspecting, maintaining, or replacing internal components and wiring—all without removing the drawer unit from the cabinet itself.

Cabinet Diagram

PC	MCC (Single-Sided Operation)	MCC (Dual-Sided Operation)
The red section is the busbar area.	The yellow section is the wire area.	The white area is the electrical zone.

Division of areas within the distribution cabinet

Depending on the different functions of each section, the distribution cabinet can be divided into 4 independent compartments.

1. Horizontal busbar chamber (an independent compartment located at the rear or top of the cabinet)
1.1 When the incoming line is on the front, the horizontal busbar is positioned at the rear of the cabinet.
1.2 The horizontal busbar is also placed on top of the cabinet.
2. Vertical busbar chamber (an independent compartment located on the left side at the rear of the cabinet).
The vertical busbar uses an "L"-shaped design and is housed within a dedicated, fully enclosed functional panel, ensuring both the stability of the vertical busbar and achieving an IP20 protection rating for its live components when the drawer unit is pulled out.
3. Functional unit rooms (individual compartments located on the left side at the front of the cabinet)—either drawer units or fixed partition units.
4. Cable Room: When cables enter from the front, it’s located on the right side at the front of the cabinet; when cables exit from the rear, it’s situated on the right side at the back of the cabinet.

Functional Unit Room

Vertical Busbar Chamber

Horizontal Busbar Chamber

Cable Room

Structure and Characteristics

●1. Skeleton
1.1 The cabinet frame is constructed using a specialized C-profile (with a 25mm module), connected via T-joints and secured with locking self-tapping screws and high-strength bolts for stable assembly. This profile comes in a variety of specifications and dimensions, allowing users to easily assemble cabinet frames of different sizes by selecting the appropriate module combinations based on the specific cabinet design or individual requirements.
1.2 The cabinet body is made from 2mm cold-rolled steel sheet or imported aluminum-zinc coated steel sheets.
●2. Enclosure: Depending on the cabinet structure and specific requirements, various types of panels can be installed onto the cabinet frame for enhanced protection.
2.1 Counter Area
a. Transparent glass door
b. Standard door panel
c. Drawer panel
d. Ventilation door
2.2 Back of the counter
a. Back-door cabinet
b. Wall-mounted cabinets have a back panel sealed in place and are secured directly with screws.

2.3 Cabinet Side: Side Panels Secured with Screws

2.4 Cabinet Top
a. Top cover plate (with ventilation holes; when wiring from the top, equip with corresponding cable exit rings or flange plates based on cable size)

2.5 Cabinet Base: Bottom Cover Plate (Equipped with corresponding cable glands or flange plates based on cable size)

2.6 Cabinets are fully separated from one another using complete partitions.

●3. Cabinet Combination Types
3.1 Drawer Cabinet (MCC)
a. The drawer cabinet consists of drawers, a cabinet frame, and related components, with all electrical elements securely mounted inside the drawers. The standard specifications for the drawer units are 8E/4, 8E/12, 8E, 16E, and 24E (where E = 25 mm), and drawers of the same specification can be easily interchanged.

b. The drawer’s rated current is up to 400A, and each unit can be equipped with 9 8E-unit drawers, allowing for a maximum of 36 circuits (8E/4) combined.

c. Primarily used in motor control circuits, it can also serve as a distribution device.

3.2 Fixed Cabinets: These cabinet types are primarily used as incoming feeder cabinets, bus tie cabinets, capacitor compensation cabinets, variable frequency drive cabinets, and soft-start cabinets, among others.