Low‑voltage Complete Switchgear_Low‑Voltage Complete Switchgear_Product

Low‑voltage Complete Switchgear

Product Overview

MNS‑type Low‑voltage Withdrawable Complete Switchgear is a high‑grade low‑voltage switchgear developed by our company to meet customers’ industrial development requirements, with reference to domestic and foreign low‑voltage switchgear designs and optimized improvements. MNS‑type low‑voltage withdrawable complete switchgear satisfies various power supply and distribution demands, and is widely applied in low‑voltage distribution systems of power plants, substations, industrial and mining enterprises, buildings, hotels, municipal construction and other scenarios.

This product complies with national standard GB7251.12, industry standard JB/T9661 and international standard IEC439‑1.

Technical Parameters

Project Name	Unit	Technical Parameters
Rated Frequency	HZ	50
Rated Voltage	V	400 380
Rated Insulation Voltage	V	690
Rated Current‑Horizontal Busbar	A	≤6300
Rated Current‑Vertical Busbar	A	≤1250
Rated Short-time Withstand Current‑Horizontal Busbar	KA	80
Rated Short-time Withstand Current‑Vertical Busbar	KA	30
Power Frequency Withstand Voltage	V/1min	1890
Protection Rating		IP40. IP30

* All products are custom‑made, and parameters are for reference only.

Normal Use Condition

Ambient air temperature: not higher than +40°C, not lower than ‑5°C, and the average temperature within 24 h shall not exceed +35°C.

Atmospheric conditions: clean air. Relative humidity shall not exceed 50% at maximum temperature of +40°C. Higher relative humidity is permitted at lower temperatures, e.g. 90% at +20°C. Moderate condensation may occasionally occur due to temperature variation.

Altitude: ≤2000 m.

For transportation and storage, the product is applicable within the temperature range of ‑25°C ~ +55°C; it can reach +70°C for a short‑term period (no more than 24 h). Under these limit temperatures, the equipment shall not suffer any irreversible damage and shall operate normally under service conditions.

If the above service conditions cannot be satisfied, the user shall notify the manufacturer at the time of order placement for negotiation.

This product can be designed to connect with computer interfaces to realize on‑line centralized monitoring and control of power system.

Product Features

MNS‑type Low‑voltage Withdrawable Complete Switchgear has the following prominent features:

Compact design: Accommodates multiple functional units within a small space.

High versatility of structural components and flexible assembly. With E=25 mm as the module, structures and withdrawable units can be freely combined to meet system‑design requirements.

Busbars are protected by high‑strength, flame‑retardant plastic functional plates with high dielectric strength, featuring fault‑arc resistance for safe and reliable operation and maintenance.

Mechanical interlock mechanisms for drawers of all sizes comply with standard requirements, with three distinct positions: connected, test and disconnected, ensuring high safety and reliability.

High‑strength flame‑retardant engineering plastics are adopted to effectively enhance protection performance.

Cabinets can be configured with appropriate protection degrees according to different service‑environment requirements.

High continuity and reliability of equipment operation.