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WDR
When you need to monitor current, voltage, or frequency in an industrial control panel, the WDR category covers a range of DIN-rail mounted monitoring relays and protection devices. These units typically feature adjustable thresholds, LED status indicators, and compact enclosures rated IP20. They are designed for single-phase or three-phase syst...
When you need to monitor current, voltage, or frequency in an industrial control panel, the WDR category covers a range of DIN-rail mounted monitoring relays and protection devices. These units typically feature adjustable thresholds, LED status indicators, and compact enclosures rated IP20. They are designed for single-phase or three-phase systems, with nominal voltages from 24V DC up to 480V AC, and can include under/over voltage relays, phase sequence relays, and current monitoring relays. The term "WDR" is widely recognized in the industry as a shorthand for "Wide Range" or "Watchdog Relay" depending on the manufacturer, but here it groups all essential monitoring solutions for electrical distribution.
These devices are primarily installed in industrial control cabinets, motor control centers, and building automation panels. They are critical for protecting motors, pumps, compressors, and conveyor systems from voltage imbalances, phase loss, or overload conditions. In renewable energy setups, such as solar inverters or wind turbines, WDR units ensure stable operation by monitoring grid parameters. They also find use in HVAC systems, water treatment plants, and data centers where continuous power quality monitoring is mandatory.
Within this category, you will find subcategories like phase monitoring relays (e.g., models with 3-phase detection and adjustable time delays), voltage monitoring relays (single-phase and three-phase, with ranges like 0-10V or 0-300V AC/DC), and current monitoring relays (with CT input for up to 100A). Typical article codes follow a pattern like "WDR-3P-230V" or "WDR-CM-5A" indicating poles, voltage, or current range. Key items include the WDR-3P-400V for three-phase systems and WDR-1P-24V for DC applications.
Partnering with Electric Automation Network gives you access to real-time pricing, up to 65% discount off list, and express worldwide shipping. Our engineering team provides personalized technical support for selecting the correct WDR model, including threshold setting and wiring diagrams. Every product includes detailed documentation, ensuring seamless integration into your automation projects.
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