MNS low-voltage withdrawable switchgear

MNS is a modular, multifunctional low-voltage distribution cabinet for power distribution and motor control in low-voltage systems requiring high reliability, including metallurgy, petroleum, chemical processing, industrial and mining facilities, and infrastructure.

MNS uses a highly flexible cabinet structure.

The cabinet accommodates components of various models and ratings to suit customer requirements and different applications.

Different types of feeder units can be installed in the same cabinet lineup or in a single cabinet to suit the connected equipment. For example, feeder circuits and motor control circuits can be combined in one cabinet.

MNS offers a complete range of low-voltage switchgear to meet diverse requirements, for low-voltage systems below 6300A.

MNS provides high reliability and safety. Its user-oriented design strengthens protection for personnel and equipment.

MNS has a fully assembled structure. Its distinctive structural profiles and connections, together with compatibility with different components, meet demanding installation schedules and power-supply continuity requirements.

MNS provides high reliability and safety. Its user-oriented design strengthens protection for personnel and equipment.

Applicable standards: IEC60349 and GB7251.12-2013.

Applications: power distribution and motor control.

Applicable standards: IEC60349 and GB7251.12-2013.

Ambient temperature: -5°C to 40°C.

Ambient relative humidity: no more than 50% at 40°C; higher relative humidity is permitted at lower temperatures.

Occasional condensation may occur, for example at 90% relative humidity and 20°C.

Location of installation: indoors.

Altitude: ≤2500m.

If these conditions cannot be met, the user must inform the manufacturer when ordering.

1.1 Incoming/outgoing connection: cable or busway (busbar bridge)

1.2 Cable entry/exit: top/bottom

1.3 Wiring access: front/rear of cabinet

1.4 Degree of protection: IP30, IP40, IP54

1.5 Separation of functional units: full or partial

2 Cabinet dimensions

2.1 Height: 2200

2.2 Width: 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: 50/60Hz

3.4 Rated impulse withstand voltage: 8kV

3.5 Rated auxiliary-circuit voltage: AC380, 220V/DC220V

3.6 Overvoltage category: III

3.7 Pollution degree: 3

3.8 Rated current: 6300A

3.9 Rated horizontal-busbar current: 6300A

3.10 Rated vertical-busbar current: 2000A, 1000A

4 Horizontal busbars

4.1 Rated short-time withstand current: 50/80kA

4.2 Rated peak withstand current: 105/176kA

5 Vertical busbars

5.1 Rated short-time withstand current: 50kA

5.2 Rated peak withstand current: 105kA

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

7 Maximum incoming/outgoing circuit-breaker rating: 4000A

① Minimum cabinet depth with a glass door: 725.

② Cabinets in the same lineup should have a uniform depth to facilitate horizontal-busbar installation.

If depths differ, a busbar transition cabinet with a width of 400 must be installed at each connection.

③ Cabinets with busbar-bridge or busway incoming/outgoing connections must have a depth ≥800.

Specially requested products can be consulted at manufacturing plants

1 Dedicated cable channels and corresponding cable fasteners facilitate equipment installation and on-site work.

2 Drawer positions are accurately located and clearly indicated. Each position can be secured with up to 3 padlocks.

3 Special structural profiles and connections ensure cabinet strength.

4 Drawer-unit contacts plug directly into the L-shaped vertical busbars, providing a simple and reliable connection.

5 A distinctive 3-section guide rail makes drawer movement more flexible and convenient. Internal components and wiring can be inspected, serviced or replaced without removing the drawer unit from the cabinet.