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ABB CM-RS.22S Current Monitoring Relay  

1. Key Parameters

• Product Model: CM-RS.22S
• Product Series: ABB CM-Series Industrial Current Monitoring Relays (Single-Phase AC Protection)
• Core Function: Single-phase AC current monitoring; overcurrent/undercurrent protection; adjustable thresholds; 1× changeover relay output; DIN rail mounting.

2. Core Features

• Dual Current Protection: Integrates overcurrent (prevents overload burnout) and undercurrent (detects equipment underload/malfunction) monitoring in one unit.
• Adjustable Thresholds: Customizable overcurrent (105%~600%) and undercurrent (10%~90%) settings adapt to diverse load requirements (e.g., small motors vs. heating elements).
• Fast Response: ≤500ms reaction to current abnormalities minimizes equipment damage risk.
• Compact Design: 22.5mm narrow width fits dense DIN rail layouts in control cabinets, saving space.

3. Application Fields

• Motor Protection: Monitors single-phase motors (e.g., 0.5kW~5kW) in fans, pumps, or compressors, preventing burnout from overloading.
• Heating Systems: Guards electric heaters or ovens against overcurrent (short circuit) or undercurrent (element failure).
• Industrial Auxiliary Circuits: Protects single-phase power loops for conveyor belts, mixers, or packaging machine components.

4. Precautions

• Compatibility: Use in single-phase AC circuits only; match power supply to specified voltages (24V AC/DC~230V AC).
• Installation: Ensure correct current transformer connection; separate relay wiring from high-power cables to reduce EMI.
• Maintenance: Calibrate thresholds annually; test relay output quarterly; clean terminals to prevent false triggering.
• Spare Parts: Use genuine ABB CM-RS.22S units—non-genuine relays may have inaccurate current measurement, risking unprotected equipment.

The structure and details of the product：

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