Low‑voltage Cabinet Temperature Measurement
Requirement Analysis
In power systems, connection points within high‑voltage switchgears, ring main units and middle‑mounted switch cabinets — such as busbar joints, various switches, circuit breakers and high‑voltage cable connectors — are prone to poor contact and increased contact resistance. These issues arise from material aging, corrosion and loosening caused by long‑term operation and temperature fluctuations. When high current passes through, equipment may burn out; in severe cases, primary equipment fire and explosion can occur. Dynamic tracking and monitoring of the operating conditions at these temperature‑rise fault points can prevent and avoid such accidents.
Temperature Measurement Solution for Low‑voltage Drawer Cabinet
The inlet and outlet connectors of low‑voltage power distribution cabinets are major locations for abnormal temperature faults due to frequent plug‑in and pull‑out operations. In addition, there are numerous measuring points (6 points for each drawer) with complex structures, making monitoring unfeasible with traditional methods.
Method 1: We adopt the compact, highly sensitive PTC‑250905.a temperature‑sensing tags, which are directly attached to the connector surface and neatly embedded inside the plug block. This ensures close contact between the temperature‑sensing tags and the core area of the plug block, enabling real‑time and accurate detection and recording of minor temperature variations within the plug block. Real‑time temperature data of all measuring points are acquired via antennas installed in the cable compartment and a reader located in the secondary instrument compartment of the incoming cabinet. It provides solid technical support for efficient operation & maintenance and potential risk early warning of electrical equipment.
Temperature Measurement Solution for Low‑voltage Drawer Cabinet
Method 2: Tie‑mounted Temperature Sensor PTC‑Z4516.a This sensor is specially designed for cable temperature measurement and features convenient and efficient installation. Secure it to the target cable with cable ties to ensure close fitting between the sensor and cable surface, so as to accurately capture temperature variations during cable operation.
U‑shaped Temperature Sensor PTC‑B2916.a For the special structure at the outgoing terminal of the low‑voltage cabinet, the U‑shaped temperature sensor PTC‑B2916.a is adopted. Its distinctive U‑shaped design fits perfectly at the cable mounting position for easy installation, guaranteeing accurate temperature data of the outgoing terminal. Sensor signals from all temperature‑measuring points are aggregated by antennas installed in the cable compartment, then received and parsed in real time by the reader located in the secondary instrument compartment of the low‑voltage cabinet, and converted into clear and intuitive temperature data.
