Acrel ARD Series Smart Motor Protectors: Protect & Optimize Your Industrial Motors

Acrel ARD Series Smart Motor Protection Relay

Acrel Co., Ltd. presents the ARD Series Smart Motor Protectors—all-in-one solutions designed for low-voltage motor circuits (up to 660V) in industrial settings. Combining protection, measurement, control, communication, and maintenance functions, these protectors keep your motors safe from faults, simplify operations, and support industrial intelligence. Whether you need a cost-effective basic model or a high-end programmable solution, the ARD Series has you covered.

Core Purpose & Wide Applications

Motors are the "heart" of industrial production—but faults like short circuits, phase loss, overload, or stalling can cause costly damage and downtime. The ARD Series solves this by providing comprehensive protection, ensuring continuous and safe motor operation.

Key Application Industries

Power generation (power plants, substations)
Coal mining, petrochemicals, and chemicals
Steel, metallurgy, and cement production
Water treatment (water plants, pump stations)
Manufacturing (automotive, packaging, food processing, textiles)
Construction, robotics, and pharmaceutical equipment
Marine, aviation, and aquaculture

Typical Motor Types Protected

Primary air fans, induced draft fans, coal mills, water circulation pumps, feedwater pumps, condensers, conveyors, and more.

Product Series: Choose the Right Model for Your Needs

The ARD Series offers 5 core models, categorized by functionality and cost to fit different project requirements:

Model Series	Positioning	Key Highlights
ARD2 / ARD2L	Economical	Basic protection + networking, ideal for simple motor circuits
ARD2F / ARD2M	Cost-Effective	Protection + control + networking, with flexible mounting (wall-mounted/DIN-rail)
ARD3	Balanced Performance	All-round protection, measurement, and communication for mainstream industrial needs
ARD3M / ARD3T	High-End	Advanced programmable functions, multi-protocol communication, and detailed data recording

6 Core Functions: More Than Just Protection

Every ARD Series protector integrates essential features to optimize motor management—from basic safety to smart monitoring:

1. Comprehensive Protection (Avoid Motor Damage)

Shields motors from common faults:

Short circuit, phase loss, overload, and stalling protection
Voltage sag (anti-interference/anti-sway electricity) protection (critical for continuous production)
Leakage current protection and temperature monitoring (supports PTC/NTC/PT100 sensors)
Customizable protection stages, start-up shielding time, and action settings

2. Flexible Control Options

Multiple control methods (direct start, two-step start, etc.)
Programmable input/output ports (up to 10 standard inputs, 6 standard outputs)
Timer, counter, and logic programming functions (high-end models)
Adapts to cabinet types: drawers, vertical cabinets, and control boxes

3. Precise Measurement & Monitoring

Track key motor data in real time:

Basic parameters: Three-phase voltage, current, power, energy, and power factor
Advanced parameters (high-end models): 2-63rd harmonics, positive/negative sequence current, zero-sequence voltage
Leakage current and temperature data
Harmonic analysis (up to 63rd order) for energy optimization

4. Smart Operation & Maintenance Records

Automatically logs start/stop events, fault history, running time, and fault counts
Waveform recording (high-end models) for troubleshooting
Disturbance recorder to track voltage fluctuations and anomalies
Easy access to data for predictive maintenance

5. Versatile Communication Networking

Seamlessly integrates with industrial control systems:

Standard protocols: MODBUS-RTU, PROFIBUS-DP
Advanced options (high-end models): PROFINET, Ethernet, wireless networking
Connects to PLC, DCS, and ECMS systems (common in power plants and large factories)
Supports centralized monitoring of multiple motors

6. User-Friendly Human-Computer Interaction

Clear display panels: Digital tube (basic models), monochrome LCD, or color LCD (high-end models)
Simple operation buttons: Start, stop, reset, alarm, and ESC
Intuitive interface for setting parameters and checking status

Industry-Specific Solutions

1. Power Plant Applications

Needs: High reliability, waveform/fault recording, multi-protocol communication, anti-shake function
Recommended Model: ARD3M (supports detailed parameter measurement and integration with DCS/ECMS systems)
Associated Systems: Works with PLC, DCS, and ECMS for centralized motor management

2. Chemical Industry Applications

Needs: Continuous production support, anti-interference electricity, fault recording, and multi-protocol communication
Recommended Models: ARD2F, ARD3, ARD3M (ARD3M-K1-XX/SU-60L1 for anti-sway electricity)
Key Feature: Anti-interference electricity function resists voltage sags caused by lightning, short circuits, or large load starts—preventing unexpected motor shutdowns

Why Choose Acrel ARD Series?

All-in-One Design: Combines protection, control, measurement, and communication to reduce system complexity
Scalability: Models for every budget—from basic to high-end programmable solutions
Global Compatibility: Supports international communication protocols and industry standards
Easy Integration: Works with existing industrial control systems (PLC, DCS, ECMS)
Proven Reliability: Trusted in industries like power generation, petrochemicals, and manufacturing worldwide

Ready to protect your motors and optimize industrial operations? Contact us for a customized quote or technical consultation!

We develop everything in-house, from end-user hardware to gateways to platforms. We integrate R&D, production, and sales.

For more solutions and product details, please add my WhatsApp: +86 15076062079 for consultation,

or you can contact me by email: binn@acrel-electric.com