Switchgear

MNS Low voltage Withdrawable Switchgear

MNS Low voltage Withdrawable Switchgear - Modular Design  High Safety Flexible Configuration

Product Overview

The MNS series low voltage withdrawable switchgear is a new generation of modular power distribution equipment, introduced from ABB’s advanced technology and improved to adapt to domestic national conditions. It adopts a fully assembled structure with a 25mm modulus C-profile as the basic component, ensuring high flexibility, safety, and reliability.

Compliant with GB 7251.1-2005 and IEC 60439 standards, it is widely used in power plants, industrial enterprises, commercial buildings, data centers, and infrastructure projects for power distribution, motor control, and reactive power compensation.

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Model Meaning

M N S – □ – □

  • M: Modular / Modularization
  • N: New Type
  • S: System
  • □: Main Circuit Scheme Number
  • □: Auxiliary Circuit Scheme Number

Structural Features

The cabinet is assembled by C-type connecting parts with 25mm modulus to form various frame structures and drawer units. In the MCC cabinet, high-strength flame-retardant engineering plastic components are used to make the safety more reliable.

  • Modular Framework: C-profile with 25mm modulus, convenient for assembly and expansion without special tools.
  • Safe Components: High-strength flame-retardant engineering plastics for internal components, improving safety.
  • Anti-Corrosion Treatment: Cold-rolled steel plate with pickling and passivation treatment, or aluminum-zinc plated steel plate available.
  • Flexible Combination: Various drawer types can be assembled in a single cabinet or mixed assembly.

Drawer Types & Capacity

Drawer Type Max. Units
8E/4 36
8E/2 18
8E 9
16E 4+8E
24E 3

Main Technical Parameters

Item Specification Standard
Overvoltage Category IV, III GB 7251.1-2005
IEC 60439
Pollution Grade 3
Rated Operating Voltage (Ue) AC 400/660V
Rated Insulation Voltage (Ui) AC 660/1000V
Rated Frequency 50 (60) Hz
Rated Current ≤ 5000A
Horizontal Busbar – Short-Time Withstand Current 50, 65, 80 kA (1s RMS)
Horizontal Busbar – Peak Withstand Current 105, 140, 176 kA (Max 0.1s)
Vertical Busbar – Rated Current ≤ 1000A
Vertical Busbar – Short-Time Withstand Current 50 kA
Vertical Busbar – Peak Withstand Current 105 kA
Protection Degree IP30, IP40 (Special note)

Normal Operating Environment

  • Ambient temperature: Not higher than +40°C, not lower than -5°C, and average temperature not higher than +35°C within 24h.
  • Relative humidity: Not more than 50% at +40°C; up to 90% at lower temperatures (allowing condensation).
  • Altitude: Not more than 2000m.
  • Installation place: No severe vibration or impact, no corrosive gas or vapor.

Cabinet Dimensions (mm)

1. Feeder / Busbar Cabinet

Type Height Width Depth
Main Busbar Transfer 2200 400 / 600 / 800 / 1000 800 / 1000
Feeder / Busbar 2200 600 / 800 / 1000 800 / 1000

2. Power Center (PC) Cabinet

Configuration Height Width Depth
2 Circuit Breakers 2200 800 / 1000 800 / 1000
3 Circuit Breakers 2200 800 / 1000 800 / 1000

3. Motor Control Center (MCC) & Capacitor Cabinet

Type Height Width Depth
MCC Cabinet 2200 600 / 800 / 1000 1000 / 800
Capacitor Compensation Cabinet 2200 600 / 800 / 1000 800 / 1000 / 600

Application Scope

MNS series switchgear is suitable for power distribution and motor control in power plants, petroleum, chemical, metallurgy, textile, high-rise buildings, shopping malls, hospitals, data centers and various industrial & civil construction fields. It can meet the power supply requirements of different working conditions.

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