Core Functional Advantages
Zoned & Modular Power Supply for Large LED Wall Arrays
Large LED walls are composed of hundreds of splicing modules, and centralized power supply easily causes local overheating, current imbalance, and overall screen blackout due to single-point failure. This distribution box adopts a hierarchical and zoned power distribution architecture to realize precise power supply management for LED screens.
Independent Zoned Output
Multiple independent output circuits are configured, corresponding to different partition areas of the LED wall (left/right/upper/lower screen zones). Each zone is equipped with exclusive circuit breaker and overload protection, ensuring that short circuit or overload fault in a single zone will not affect the power supply of the entire LED wall.
Load Balancing Design
Reasonably distribute three-phase loads according to the power consumption characteristics of LED modules, effectively avoid single-phase overloading, solve the problem of inconsistent brightness and local dimming caused by unbalanced three-phase current of large-area LED screens.
Modular Quick Connection
Matched with standard industrial fast plugs, no on-site wiring and welding is required. It supports rapid power deployment and disassembly for rental LED projects, greatly improving the construction efficiency of temporary events.
Timed Sequential Power-On
Optional sequential power-on function to avoid instantaneous collective inrush current of all LED modules, prevent instantaneous voltage drop caused by simultaneous startup of the whole screen, and protect LED power supply modules from impact damage.
Generator Access & Multi-Genset Paralleling Compatibility
Outdoor LED wall projects mostly rely on diesel generators for power supply. Large-size LED screens have large total load capacity, which requires multiple generators to work in parallel. This distribution box is professionally optimized for generator access and parallel operation, solving the problems of difficult synchronization, unbalanced load distribution and equipment burnout caused by non-synchronous paralleling.
Universal Genset Access Terminal
Reserved special access ports for 2/4/6 wire diesel generators, compatible with all conventional rental generator sets on the market, realizing fast docking of field power supply equipment.
Intelligent Parallel Synchronization Protection
Built-in phase, voltage and frequency real-time monitoring modules. The system automatically locks the switch and prohibits closing if the synchronization parameters are abnormal, completely avoiding equipment damage caused by non-synchronous paralleling impact.
Automatic Load Sharing
After multi-generator paralleling, the system intelligently distributes active load, prevents individual generators from overloading or no-load idle operation, improves generator fuel efficiency, and reduces operation noise and carbon deposition failure rate.
Fault Isolation & Hot Backup
Support single-unit independent bypass operation. When one generator fails or shuts down, the system automatically cuts off the faulty unit and switches the load to other parallel units without causing LED screen blackout.
Energy Storage Hybrid Power Supply Solution
LED walls have frequent load fluctuations during event switching, program switching and screen brightness adjustment. Long-term unstable generator load will cause voltage jitter, screen flicker and high fuel consumption. This distribution box supports diesel generator + energy storage hybrid grid-connected operation, realizing efficient and stable power supply for LED screens.
Peak Shaving & Valley Filling
When the LED screen switches to high-brightness full-screen display with instantaneous peak load, the energy storage system instantly supplements power to bear the instantaneous impact load, reduce the peak power demand of generators, and reduce the configuration quantity and power of gensets.
Stabilize Voltage & Suppress Flicker
Effectively offset the voltage fluctuation caused by frequent load changes of LED screens, stabilize the bus voltage within the standard range, completely solve the screen flicker, color cast and screen flash problems common in outdoor LED display.
Low-Noise & Zero-Emission Power Supply
Support pure energy storage power supply mode. It can cut off diesel generators during night performances or noise-restricted periods, relying entirely on energy storage to supply power for LED walls, meeting environmental protection and noise control requirements.
Multi-Mode Switching
Built-in three working modes: Genset Priority, Energy Storage Priority, and Intelligent Hybrid Auto Mode, which can be freely switched according to on-site power supply conditions and event requirements.
Rainstorm & Sudden Power Failure Emergency Preplan
Outdoor LED walls are exposed to open air for a long time, facing risks of rainwater immersion, high humidity, line leakage and sudden power failure. This distribution box adopts multi-layer protection and redundant power supply design to build a complete emergency power guarantee system for LED display projects.
High-Level Waterproof & Moisture-Proof Protection
Full IP65 waterproof enclosure, equipped with waterproof sealing rubber ring, waterproof cable gland and rainproof baffle. The box body is designed with a raised base to prevent immersion from field ponding. Internal components adopt moisture-proof and anti-condensation treatment to avoid short circuit caused by rainwater and humidity.
Selective Leakage & Overload Protection
Hierarchical A-type leakage protectors are configured for the main circuit and branch circuits. The branch circuit adopts 30mA high-sensitivity leakage protection to cut off faulty lines in time, and the main circuit adopts 100mA leakage alarm protection to avoid full-screen power failure caused by single-point line leakage.
ATS Automatic Uninterrupted Switching
Built-in dual-power ATS switching module. When the main power supply (generator/municipal power) fails due to rainstorm, lightning strike or line fault, it can automatically switch to standby power supply (energy storage/backup generator) within 100ms, realizing flicker-free power switching for LED walls and ensuring continuous display without black screen.
Fault Early Warning & Manual Bypass
Real-time monitoring of internal temperature and humidity of the box, with over-temperature and condensation alarm functions. Reserved manual bypass circuit. When the intelligent control system fails, manual emergency power supply can be adopted to ensure the normal operation of key LED screen loads.
Actual Project Case & Test Data (Load & Voltage Fluctuation)
Project Background
Outdoor music festival main stage ultra-large LED wall (120㎡), 3-day continuous outdoor operation, with intermittent rainstorm weather during the event, supporting dynamic program switching, full-screen high-brightness display and frequent screen switching working conditions.
On-Site Load Configuration
Measured Voltage Fluctuation Data Comparison
Pure Diesel Generator Power Supply Mode (Without Energy Storage)
When the LED wall switches to full-screen high-brightness instantaneous load, the three-phase bus voltage drops from 380V to 351V, with a fluctuation rate of -7.6%. Obvious screen flicker and local color cast appear in individual LED modules, and low-voltage alarm occurs in partial power supply modules.
Genset + Energy Storage Hybrid Power Supply Mode
Under the same peak load impact condition, the three-phase bus voltage is stabilized at 372V, with a fluctuation rate of only -2.1%. The voltage is always within the standard allowable ±5% range, no screen flicker, color cast or low-voltage alarm occurs, and the LED wall operates stably.
Rainstorm Weather Working Condition Test
Under the condition of moderate rain and on-site slight ponding, a single branch line has slight leakage. The branch leakage protector acts accurately to cut off the faulty line, while the power supply of other LED screen partitions is normal, and the overall display of the screen is not affected.
Core Technical Parameters
| Rated Input Voltage | 380V Three-Phase Five-Wire, 50Hz |
| Parallel Support | Max 4 sets of diesel generators synchronous paralleling |
| Energy Storage Access Mode | 400V AC coupling hybrid grid connection |
| Protection Level | IP65 |
| ATS Switching Time | ≤100ms (uninterrupted switching) |
| Monitoring Parameters | Three-phase voltage, three-phase current, active power, frequency, leakage current, box temperature and humidity |
| Working Temperature | -20°C ~ +55°C |
| Applicable Load | All types of indoor/outdoor rental LED screens, fixed large display screens |
FAQ
1: Can this distribution box support zoned power supply for large spliced LED walls?
Yes. It adopts independent zoned loop design. Each LED screen partition corresponds to a separate protected circuit. Any single partition fault will not cause the whole screen to black out, realizing safe and refined power management.
2: Does it support multi-generator parallel operation for high-power LED walls?
Absolutely. It is built with synchronous monitoring and load sharing protection system. It supports multiple gensets parallel connection, automatic load distribution and fault unit isolation, which perfectly matches high-power LED wall power demand.
3: What improvements does energy storage hybrid mode bring to LED screen display effect?
The hybrid system eliminates voltage flicker caused by LED instantaneous load surge, stabilizes grid voltage, completely solves screen flash and color cast problems, and meanwhile reduces generator fuel consumption and operation noise.
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