ABB SENSICAL FCU400-IR

The FCU400‑IR is a non-contact infrared temperature monitoring system developed by ABB for medium-voltage switchgear (e.g., busbar connections, circuit breakers). It detects hot spots via infrared thermal imaging, displays and records temperatures in real time, and prevents local overheating and equipment damage caused by increased contact resistance. The system consists of an infrared thermometer, an optional Pt100 ambient temperature sensor, a measurement computer (caloric energy computer), and a metal housing. Featuring a modular structure, it can be flexibly expanded to meet on-site requirements.

Key Technical Parameters

• Environmental Rating: IP65 (NEMA‑4), suitable for harsh industrial environments
• Operating Temperature Range: -20 °C - +75 °C
• Temperature Measurement Range: -20 °C - +350 °C (extendable via software)
• Spectral Response: 8 µm - 14 µm
• Resolution: Optical resolution 10:1; temperature resolution 0.1 °C (NETD)
• Temperature Measurement Accuracy: ±1.5 °C or ±1.5 % (whichever is greater)
• Response Time: 30 ms (adjustable); thermal response 2 s (adjustable)
• Power Supply: 24 V DC, current consumption approx. 9 mA
• Output: Analog 0–5 V or 0–10 V; optional MODBUS/RS‑232/RS‑485 digital output
• Interfaces: USB (for programming); M‑Bus, IRDA, ZVEI optical interfaces for data reading and configuration
• Dimensions: Approx. 144 mm × 118 mm × 72 mm (housing); weight approx. 58 g (infrared sensor unit)
• Electromagnetic Compatibility (EMC): Complies with EN 61326‑1, low-voltage directive and EMC directive

Product Features

1. Continuous Online Monitoring: Enables real-time, non-contact temperature measurement of live components on site.
2. Multi-point Monitoring: A single system can monitor up to 12 hot spots, ideal for large switchgear cabinets.
3. Flexible Threshold Setting: Warning and alarm thresholds are freely adjustable, supporting local analog output or MODBUS remote transmission.
4. Modular Structure: The measurement computer, infrared probe, and optional Pt100 sensor are all detachable modules, facilitating on-site upgrades and maintenance.
5. Full Shielding Design: Metal housing and internal shielding ensure reliable operation in strong electromagnetic environments.
6. Data Logging Function: A logger with a built-in real-time clock stores temperature data, thresholds, and alarm timestamps.
7. Maintenance-free Operation: The infrared probe does not make direct contact with live components, reducing maintenance frequency and safety risks.

Structure and Components

• Infrared Thermal Imaging Probe (IR‑Sensor CS): Captures thermal radiation from hot spots.
• Caloric Energy Computer: Performs signal processing, temperature calculation, threshold comparison, and drives display/output functions.
• Connector Block: Provides power, signal, and communication interfaces.
• EMC Protection Housing (frame + rear cover): Metal-shielded to prevent external electromagnetic interference.
• Cable Bushing: Protects wiring and maintains hermetic sealing.
• Optional Pt100 Ambient Temperature Sensor: Compensates for the impact of ambient temperature on measurement results.
• Display Unit: Multi-line LCD for on-site direct reading of hot spot numbers, temperature values, and alarm statuses.

Typical Application Fields

• Medium-voltage Switchgear Cabinets: Hot spot monitoring of busbar connections and circuit breaker contacts.
• Substations: Local temperature pre-warning for high/medium-voltage equipment.
• Distribution Networks: Online temperature monitoring of distribution boxes and switching stations.
• Industrial Facilities: Thermal condition monitoring of large motors and generator sets.
• Rail Transit Power Supply Systems: Temperature management of traction power supply equipment.

Installation Guidelines

1. Location Selection: Ensure the installation site has an unobstructed view for direct alignment with measurement points.
2. Fixing: Mount the infrared probe on a metal bracket or panel using screws, maintaining the optimal distance between the probe and measurement points (typically 300 mm - 800 mm, calibratable via software).
3. Wiring: Route the power cable (24 V DC) and signal cables through dedicated cable bushings into the device to avoid tension and vibration.
4. Grounding: The metal housing must be reliably grounded to meet the shock and vibration requirements specified in IEC 68‑2‑6/27.
5. Calibration: Perform a warm-up (approx. 10 min) after initial power-on, then calibrate the emissivity (0.1 - 1.0) and transmission coefficient via software or the on-site panel.

If you would like to learn more about our products and services, please feel free to contact us at any time!

• Sales Manager : Jinny
• Email : sales5@xrjdcs.com
• Whatsapp/Mobile:+86 15359273791

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