MNS Withdrawable Switchgear

Overview

The MNS low-voltage withdrawable switchgear (hereinafter referred to as the switchgear) is a fully assembled low-voltage switching device characterized by its flexible, modular, versatile design and reliable, safe performance. It is ideally suited for use in industries such as metallurgy, petroleum, chemical processing, mining enterprises, and infrastructure projects. The switchgear is designed for distribution systems, centralized motor control, and other low-voltage applications in 50 (60) Hz three-phase AC power systems with rated operating voltages of 380 V (400 V) or up to 660 V, and rated currents not exceeding 4000 A.

The switchgear has undergone comprehensive type tests and is certified under the national mandatory 3C certification for products. The product complies with standards such as GB 7251.12 "Low-Voltage Switchgear and Control Equipment" and IEC 60439-1 "Low-Voltage Switchgear and Control Equipment."

Model and Its Meaning

Normal operating conditions

1 Ambient air temperature not exceeding 40°C, with a 24-hour average no higher than 35°C, and a minimum ambient air temperature of -25°C;

2 The installation site must not exceed an altitude of 2000 meters.

3 The surrounding air is not noticeably contaminated by dust, smoke, corrosive or flammable gases, vapors, or salt spray.

4 Atmospheric Conditions: Air must be clean, and the relative humidity should not exceed 50% at a maximum temperature of +40°C. At lower temperatures, higher levels of relative humidity are permissible—e.g., up to 90% at +20°C. However, it’s important to note that fluctuations in temperature may occasionally lead to moderate condensation.

5. During equipment installation, the tilt angle relative to the vertical plane should not exceed 5°.

6. The equipment should be installed in a location free from severe vibrations and shocks.

Note: Users with special requirements may discuss solutions directly with our company.

Structural Features

The product design fully considers the needs of both power users and the design department, effectively addressing the evolving demands of the power industry—such as enhanced capacity, centralized control, ease of installation and maintenance, and reduced downtime for fault resolution—while ensuring safety, cost-effectiveness, practicality, and reliability. Featuring robust connectivity, superior breaking capacity, excellent dynamic stability, flexible electrical configurations, convenient modular assembly, strong series compatibility, and a modern, innovative design, this product represents a cutting-edge upgrade to China’s domestic low-voltage fixed switchgear. It can also be seamlessly integrated with drawer-type cabinets for mixed-use applications.

Basic structure:

The switchgear cabinet structure is assembled using profiled materials (with a module of E = 25 mm). Thanks to the use of locking self-tapping screws and high-strength 8.8-grade bolts for connections, the cabinet boasts high precision and excellent performance. Additionally, the cabinet features a distinct separation between its external appearance and internal components.

Main technical specifications

External Structure and Installation Dimensions

Product Completeness

The following documents and attachments should be provided upon delivery:

1. Certificate of Qualification;

2 Packing lists;

3 User Manual;

4. Factory Inspection Report;

5 Regarding electrical drawings;

6 cabinet door keys and operating handles—spare parts specified in the contract.

Ordering Instructions

The following information should be provided when placing an order:

1 Main circuit system schematic diagram;

2. Auxiliary Circuit Electrical Schematic;

3. List of components inside the cabinet (including component model, name, specifications, and quantity);

4 Switchgear Layout Plan;

5 Cabinet color (if no specific request, supplied according to our company's standard);

6. List of required spare parts and components;

7. Other special requirements that do not align with the product's normal use.