China MNS Low Voltage Withdrawable Switchgear for Power Control Factories, Company

MNS LV Withdrawable Switchgear is a modular solution for AC 660V/50-60Hz power systems, combining factory-assembled FBA standard units. This MNS LV withdrawable switchgear meets GB7251.1 and IEC439-1 standards, ideal for power plants, petrochemical plants, and high-rises (-5°C to +40°C operation). With 90% humidity tolerance (at +20°C) and 2000m altitude rating, the MNS LV withdrawable switchgear ensures reliable energy distribution and motor control in demanding environments.

Product Description

Type Designation

Type Designation
1Modularization & Modularity
2New type
3System
4Main Circuit Scheme Number
5Auxiliary Circuit Scheme Number

Technical Parameters

1. Electrical Performance
Rated Insulation Voltage660V(1000)V
Rated Operational Voltage380V, 660V
Main Busbar Maximum Operational Current5000A
Main Busbar Rated Withstand Current100kA/1s
Main Busbar Rated Peak Withstand Current220kA/1s
Distribution Busbar (Vertical) Maximum Operational Current1000A
-Standard Type Peak Current105kA(Max)/0.1s
-Reinforced Type Peak Current176kA(Max)/0.1s
2. Protection Degree
IP30Protection against solids > Φ2.5mm
IP40Protection against solids > Φ1.0mm
IP54Dust-protected & splashed water from any direction (Customizable)
* Complies with IEC529, DIN 40050 Standards

Type of switchgear

Motor Control Center Cabinet (MCC): Assembled from large and small drawers, using high break plastic case circuit breakers or rotary load switches with fuses.
Power Distribution Center Cabinet (PC): Compatible with Emax, MT, 3WN, AH, ME series circuit breakers, etc.
Automatic Compensation Cabinet: Power factor automatic compensation featuring manual, automatic, and motion devices.

Product Display

MNS Switchgear Display 1
MNS Switchgear Display 2

Cabinet Diagram

Cabinet Diagram

Power Distribution Center (PC) Cabinet

HW (B)TT1T2Note
22004001000800200Main Busbar Transfer
22004001000800200F1s-1250-2000 ME630-1605
22006001000800200F2s-2500
22008001000800200F4s-3200 ME2000-3200
220010001000800200F5s-4000 ME3205

Motor Control Center (MCC) Cabinet

HBB1B2TT1Operation
22001000600400600400Single-sided
220010006004001000400Double-sided

Assembly & Installation

Assembly Diagram

Assembly diagram

Installation Diagram

Installation diagram

Transportation and Storage Specifications

1. Transportation: Use transport angle plates with ≤120° wire rope angles; avoid direct contact with chassis when using tools.
2. Handling: Prevent tilting/vibration; for minor moves, only pry at test frame corners.
3. Components: No unauthorized disassembly of electrical parts; maintain rain/moisture protection.
4. Documentation: Includes packing list, certifications, manuals, drawings, keys, and matched spare parts.
Frequently Asked Questions
Q: What is the main application of MNS low-voltage switchgear? A: It is widely used in power plants, substations, industrial and mining enterprises, and high-rise buildings for power conversion, distribution, and control.
Q: What is the maximum operational current for the main busbar? A: The main busbar can handle a maximum operational current of up to 5000A.
Q: Can the protection degree be customized to IP54? A: Yes, while IP30 and IP40 are standard, IP54 (dust-protected and splashed water protection) can be customized through the manufacturer.
Q: What circuit breakers are compatible with the PC cabinets? A: The PC cabinets are designed to be compatible with ME, Emax, MT, 3WN, AH, and other series circuit breakers.
Q: What safety precautions should be taken during transportation? A: Transport angle plates should be used with wire rope angles not exceeding 120°, and direct contact with the chassis should be avoided to prevent damage.
Q: What is the difference between MCC and PC cabinets? A: MCC (Motor Control Center) cabinets use drawers for motor control, while PC (Power Distribution Center) cabinets focus on high-capacity power distribution using large circuit breakers.

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