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Series 70 - Line monitoring relay - FINDER
Line monitoring relays, also known as voltage monitoring relays or phase sequence relays, are essential components for protecting three-phase and single-phase electrical installations against voltage anomalies. The FINDER Series 70 encompasses a comprehensive range of these devices, designed to monitor parameters such as overvoltage, undervoltag...
Line monitoring relays, also known as voltage monitoring relays or phase sequence relays, are essential components for protecting three-phase and single-phase electrical installations against voltage anomalies. The FINDER Series 70 encompasses a comprehensive range of these devices, designed to monitor parameters such as overvoltage, undervoltage, phase failure, phase sequence, and asymmetry. These relays typically feature adjustable thresholds and hysteresis, ensuring precise detection and response. They are available in various supply voltage ranges (e.g., 3x400V AC, 230V AC) and output configurations, including SPDT or DPDT contacts rated for up to 16A. The compact modular housing (17.5mm width per module) allows for easy DIN rail mounting in control panels.
These monitoring relays are deployed across a wide spectrum of industrial and commercial applications. They are critical in motor control centers (MCCs) for protecting pumps, compressors, and conveyors from phase loss or incorrect phase sequence, which can cause severe damage. In building automation, they safeguard HVAC systems, elevators, and lighting circuits. They are also used in power distribution panels for generator sets, UPS systems, and transformer protection, ensuring stable operation and preventing costly downtime.
The FINDER Series 70 line includes several key subcategories and article codes. The 70.11 series offers basic voltage monitoring with adjustable thresholds, while the 70.31 series adds phase sequence and asymmetry detection. The 70.41 series provides comprehensive three-phase monitoring with a wide adjustment range. Article codes typically follow the pattern 70.11.8.xxx.xxxx, where the first digits indicate the series, the next digit the number of poles or functions, and the final digits specify the supply voltage and output configuration. For example, 70.11.8.230.0000 is a common code for a basic voltage monitoring relay with a 230V AC supply.
Partnering with Electric Automation Network for your FINDER Series 70 needs ensures access to genuine products with real-time pricing and up to 65% discount compared to list prices. Our engineering team provides specialized technical support to help you select the correct relay for your specific application, including assistance with threshold settings and wiring. We offer express worldwide shipping, ensuring your critical components arrive when needed. Each product listing includes detailed technical documentation, datasheets, and wiring diagrams, facilitating seamless integration into your projects.
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