Acrel ALP500 Low Voltage Protection and Control Device Full Introduction to Functional Highlights and Application Scenarios

In low-voltage power distribution systems of industrial production, commercial buildings, and data centers, even a small current anomaly or voltage fluctuation can lead to equipment damage, production interruption, or even safety accidents. How can we make power distribution systems smarter and more reliable? Acrel ALP500 low-voltage protection and control device, with its dual strengths of "all-around protection + intelligent control," safeguards your power distribution safety.

Why Choose ALP500? Solving Three Core Pain Points at Once

Low-voltage power distribution systems often face three major challenges:

Incomplete Protection

Traditional devices have limited functionality, making it difficult to detect potential problems such as leakage current and abnormal temperatures;

Low Maintenance Efficiency

Troubleshooting is time-consuming, and scattered data is difficult to analyze;

Poor Compatibility

Incompatible interfaces across different scenarios and equipment result in high integration costs.

The ALP500 addresses these issues from the design stage, integrating 23 protection functions, full parameter monitoring, and flexible communication, transforming power distribution systems from "reactive repair" to "active defense."

ALP500: More than just protection, it's the "intelligent brain" of the power distribution system.

A comprehensive protection network, leaving no blind spots in safety.

From basic overcurrent and overvoltage protection to detailed zero-sequence current and leakage current monitoring, and even special scenarios such as abnormal temperature and PT disconnection, the ALP500 covers 23 protection functions, comprehensively intercepting risks.

Inverse-time overcurrent protection:

• Dynamically adjusts protection strategy based on cable heating characteristics to prevent overload burnout;

• Zero-sequence/leakage current protection:

• Accurately detects grounding faults to prevent electric shock and fire;

• Temperature-linked protection:

• Equipped with wired/wireless temperature measurement modules, it monitors busbar and node temperatures in real time, providing automatic over-temperature warnings;

•  Voltage/current imbalance protection:

• Promptly detects three-phase imbalances to reduce equipment losses.

Whether it's a sudden short circuit or a long-term minor anomaly, the ALP500 can respond quickly, nipping risks in the bud through alarms and tripping actions.

Comprehensive Parameter Monitoring for More Intuitive Data Visualization

As the "eyes of the power distribution system," the ALP500 can measure all electrical parameters in real time, including:

Basic parameters such as voltage, current, power, and frequency;

2nd-63rd harmonic content and total distortion rate for precise power quality analysis;

Current/voltage imbalance and positive/negative/zero-sequence components for early warning of system anomalies;

Detailed data such as demand, load factor, and neutral current to aid in load management.

All data can be viewed intuitively on the control panel and can also be uploaded to the monitoring system via communication, giving maintenance personnel a clear understanding of the system status.

Flexible Adaptability, Comprehensive Scene Coverage

Whether you are building a new project or upgrading/renovating, the ALP500 can easily adapt.

Wide Voltage Supply: AC85-265V/DC100-300V power input, adaptable to complex power grid environments;

Multiple Current Support: 1A/5A (compatible with 0.5-6300A), 25A/100A (direct connection), no additional modification required;

Abundant Communication Options: Standard configuration includes 2 Modbus-RTU channels, with optional Modbus-TCP, PROFIBUS, 4G, LoRa, etc., easily connecting to various monitoring systems;

Strong Expandability: Supports 10 DI channels, 7 DO channels, and 2 4-20mA analog outputs to meet customized needs.

Intelligent Operation and Maintenance: Reduced Costs, Increased Efficiency, and Greater Peace of Mind

The ALP500 not only "protects," but also helps you "manage":

Full Event Tracking: Automatically stores opening and closing records, fault waveforms, DI position changes, and other events, supporting export to USB drives, improving troubleshooting efficiency by 50%; Remote Control and Debugging: Enables remote opening and closing and parameter setting via communication, reducing on-site maintenance costs; Lifespan Management: Records circuit breaker operation counts and operating times, allowing for advance planning of maintenance cycles and preventing unexpected downtime.

Who Needs the ALP500? Essential for These Scenarios!

Industrial Plants: Ensures stable power distribution for production lines, reducing downtime losses due to faults; Commercial Buildings: Protects critical equipment such as air conditioners and elevators, improving power safety; Data Centers: Provides a stable power environment for precision equipment, preventing data loss; Municipal Facilities: Outdoor power distribution systems such as streetlights and pump stations, adapting to harsh environments.

Aaron Shi

Electrical Engineer Expert, Providing Service, consultant, product expert, professional manufacturer of energy efficiency management systemic solutions, and energy meters.