1.Product Overview
MNS low-voltage switchgear is a modular low-voltage power distribution system designed and manufactured based on advanced international standards. It adopts a standardized and serialized design concept, offering high flexibility and reliability. The product is constructed from high-quality cold-rolled steel plates processed with CNC technology, ensuring a robust and durable structure. All functional units are modularized, allowing flexible configuration according to user requirements.
The cabinet features a compartmentalized design, separating the busbar zone, functional unit zone, and cable zone to enhance safety and reliability. The main busbar system uses high-strength tin-plated copper bars with low contact resistance and minimal temperature rise. Functional units can be installed in withdrawable or fixed configurations, with withdrawable units having distinct “connected,” “test,” and “disconnected” positions to ensure operational safety.
MNS low-voltage switchgear is equipped with advanced protection devices and intelligent monitoring systems, providing multiple protection functions such as overload, short-circuit, and ground fault protection. It also supports communication interfaces for integration with upper-level systems, enabling remote monitoring and intelligent management. The product complies with international and national standards such as IEC 60439 and GB 7251 and has undergone comprehensive type tests to ensure stable operation in harsh environments.
This product is particularly suitable for applications requiring high power supply continuity, such as data centers, hospitals, and airports. Its modular design facilitates system expansion and maintenance, significantly reducing lifecycle costs.
2. Product Functions
1) Power Distribution Function
Enables rational power distribution and transmission
Supports multi-circuit output configurations
Provides feeder circuits of various capacity levels
2) Protection Function
Overload protection: Achieved via thermal-magnetic or electronic trip units
Short-circuit protection: High-breaking-capacity circuit breakers ensure reliable protection
Ground fault protection: Optional dedicated ground fault protection devices
Undervoltage protection: Prevents equipment operation under low-voltage conditions
3) Control Function
Motor starting control: Supports direct-on-line, star-delta, soft-start, and other methods
Lighting control: Enables zoned and timed control
Capacitor switching control: Provides automatic reactive power compensation
4) Monitoring and Communication Function
Real-time monitoring of voltage, current, power, energy, and other parameters
Fault recording and alarm functions
Supports communication protocols such as Modbus and Profibus
Seamless integration with SCADA, DCS, and other systems
3. Product Features
1) Modular Design
Standardized 25mm module-based structure for flexibility
Functional units can be freely combined for easy expansion
Eight standard sizes for withdrawable units, ensuring interchangeability
Supports future upgrades, reducing initial investment
2) High Reliability
High-quality electrolytic copper busbars for excellent conductivity
High-strength bolted connections at critical joints
Silver- or nickel-plated contacts in withdrawable units for reliable connection
Validated through rigorous type tests
3) Enhanced Safety
Strict compartmentalization prevents fault propagation
Comprehensive mechanical interlock system prevents misoperation
Optional arc fault protection system
Multiple grounding protection measures
4) High Intelligence
Integrated smart meters and communication modules
Supports remote monitoring and fault diagnosis
Power quality monitoring function
Seamless integration with building automation systems
5) Easy Maintenance
Front-access operation and maintenance save space
Quick replacement of withdrawable units minimizes downtime
Clear labeling and documentation system
Standardized spare parts ensure supply availability
6) Energy-Efficient and Eco-Friendly
Manufactured using environmentally friendly materials
Optimized design reduces self-consumption
Supports reactive power compensation for improved energy efficiency
Complies with RoHS and other environmental directives
Product Parameters
1) Basic Parameters
Parameter Technical Specification
Rated insulation voltage 1000V
Rated operational voltage AC 400V/690V
Rated frequency 50/60Hz
Rated current Main busbar ≤6300A, branch busbar ≤1600A
Rated short-time withstand current 50kA/1s (standard), up to 100kA/1s
Rated peak withstand current 105kA (50kA system), 210kA (100kA system)
2) Structural Parameters
Parameter Technical Specification
Cabinet dimensions (W×D×H) Standard 25mm module, common size 600×1000×2200mm
Protection level IP30 (indoor standard), up to IP54
Installation method Fixed or withdrawable
Color Standard RAL 7032 or custom
3) Electrical Performance
Parameter Technical Specification
Power frequency withstand voltage 2500V/1min (no breakdown or flashover)
Insulation resistance ≥1000MΩ (phase-to-phase and phase-to-ground)
Grounding resistance ≤0.1Ω
Busbar system temperature rise ≤65K (at 40°C ambient temperature)
4) Environmental Conditions
Parameter Technical Specification
Ambient temperature -5°C to +40°C (max. daily average ≤35°C)
Relative humidity ≤95% (non-condensing)
Altitude ≤2000m (derating required above this level)
Seismic resistance Horizontal acceleration 0.3g, vertical acceleration 0.15g
