Overview

The MNS system is a factory-assembled low-voltage switchgear assembly that complies with the technical standards GB7251.1, IEC439-1, VDE0660 Part 500, BS5486 Part 1, and UTE63-410. As a marine product, it also meets the Lloyd’s Register marine standards.

Model Meaning

M: Low-Voltage Switchgear
N: Withdrawable
S: Control Center

Introduction to the MNS System

The MNS system low-voltage switchgear includes both fixed-mounted and drawer-type designs, with material options ranging from steel plate construction to plastic construction. The latter boasts a technical level that matches international standards from the 1990s.
The MNS system can meet a wide range of power supply and distribution requirements and is widely used in distribution systems for various industrial and mining enterprises, including land-based applications, power plants, nuclear power plants, marine applications, and oil platforms.

Product Features

Compact design: Accommodates more functional units within a smaller footprint.
The C‑type profiles, which feature strong structural versatility and flexible assembly, can meet the requirements of various structural configurations, protection levels, and operating environments, with 25 mm as the standard module.
Adopting a standard modular design: It can be configured into standard units for protection, operation, switching, control, regulation, measurement, and indication, allowing users to freely select and assemble according to their needs. With more than 200 types of components, various cabinet frame structures and fixed partition or drawer units can be assembled.
Safety: A large number of high‑strength, flame‑retardant engineering plastic components are used, effectively enhancing protective safety performance; · High technical performance: Key parameters meet contemporary international standards.
Compressed site requirements: High degree of prefabrication allows for significant reduction in the space needed for storing and transporting prefabricated components.
Easy to assemble: no special or complex tools required;

Basic Parameters

Rated insulation voltage: 690 V/AC; · Rated operating voltage: 400 V/AC; · Rated impulse withstand voltage: 8 kV;
Rated frequency: 50–60 Hz;
Maximum operating current of the main busbar: 6300 A;
Main busbar short-time withstand current: 100 kA;
Peak withstand current of the main busbar: 220 kA;
Maximum operating current of the distribution busbar (vertical busbar): 1200 (2000 A); · Short-time peak current of the distribution busbar (vertical busbar): 176 kA; · Protection class: IP30–IP54.

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