Alumina, as a key inorganic non-metallic material in modern industry, has excellent performance and is environmentally friendly. It is widely used in various fields such as metallurgy and electronics, and is an important support for promoting industrial upgrading. During its production process, the stable operation of the power system in the substation is crucial for the continuity of production. It is necessary to ensure equipment safety through intelligent control, wireless temperature measurement, and partial discharge monitoring devices. This aluminum industry circular economy project, relying on overseas bauxite resources and port advantages, responds to the development strategy of Guangxi's aluminum industry of "both ends within, middle outside", and builds a green circular economy industrial chain. After completion, it will link downstream electrolytic aluminum and photovoltaic glass industries, and increase the local conversion rate of aluminum resources. The project started in June 2025 and will use Ancre intelligent control, wireless temperature measurement, and partial discharge monitoring products in the 10KV substation, monitoring and controlling the environment inside the switch cabinets, contact temperatures, and monitoring the partial discharge situation of the switch cabinets. 

1. Overview 
Alumina, as a key inorganic non-metallic material in modern industry, has excellent performance and is environmentally friendly. It is widely used in various fields such as metallurgy and electronics, and is an important support for promoting industrial upgrading. During its production process, the stable operation of the power system in the substation is crucial for the continuity of production. It is necessary to ensure equipment safety through intelligent control, wireless temperature measurement, and partial discharge monitoring devices. This aluminum industry circular economy project, relying on overseas bauxite resources and port advantages, responds to the development strategy of Guangxi's aluminum industry of "both ends within, middle outside", and builds a green circular economy industrial chain. After completion, it will link downstream electrolytic aluminum and photovoltaic glass industries, and increase the local conversion rate of aluminum resources. The project started in June 2025 and will use Ancre intelligent control, wireless temperature measurement, and partial discharge monitoring products in the 10KV substation, monitoring and controlling the environment inside the switch cabinets, contact temperatures, and monitoring the partial discharge situation of the switch cabinets. 
2. Product requirements, configuration plans and 
2.1 Product Requirements 
For this particular alumina project, it is required to equip 10KV switch cabinets with an intelligent control device. This device must have the ability to monitor the electrical parameters and operational physical quantities of the system in real time, covering dynamic simulation display of switch status, high-voltage live display and locking, electric test and phase comparison, wireless temperature measurement data presentation, switch cabinet partial discharge monitoring, environmental temperature and humidity monitoring, as well as monitoring and visual display of parameters such as voltage, current, and power; it also needs to have the functions of forced heating, forced lighting, human body sensing, and voice alarm prompts, and integrate remote/local switching switches, opening and closing switches, energy storage switches, etc. as control components. 
The details of the Ankerui intelligent control and partial discharge monitoring products used in this project are as shown in the following table:

2.2 Configuration Plan 
This project is aimed at 10KV high-voltage cabinets, and has completed the configuration work of the intelligent control products and the partial discharge monitoring products. Among them, the intelligent control device ASD500 is deployed at the cabinet door position of the instrument room, and one device is configured for each cabinet; the partial discharge monitoring device APD300-L is installed at the cabinet wall of the cable room, and also one device is configured for each cabinet; each high-voltage cabinet is equipped with 9 wireless temperature measurement sensors. 
During the implementation of this alumina project, a total of 347 Ankeri intelligent control devices ASD500 were invested, 347 switch cabinet partial discharge monitoring devices APD300-L were also deployed, and a total of 3,123 wireless temperature sensors were installed, meeting the monitoring and control requirements of the project. 
3. Product Introduction 
In this project, the intelligent control device ASD500, the switch cabinet partial discharge monitoring device APD300-L, and the wireless temperature measurement sensor ATE400 were used. Below, the product introductions of the three devices used in the project will be presented.

The above pictures show the networking diagrams of ASD500, ATE400 and APD300-L. 
3.1 Intelligent Control of ASD50 
The ASD500 switch cabinet integrated measurement and control device is used for 3-35kV indoor switch cabinets and is applicable to various types of switch cabinets such as panel-mounted cabinets, drawer-type cabinets, fixed cabinets, and ring-main units. It features a primary circuit simulation diagram and switch status indication, high-voltage live display and phase comparison, automatic temperature and humidity control, heating circuit fault alarm, indication of good opening and closing circuits, measurement of opening and closing circuit voltages, flashing indication for pre-opening and pre-closing, wireless temperature measurement of electrical nodes, automatic lighting upon human detection, voice prompts, electrical parameter measurement, partial discharge monitoring, RS485 and Ethernet communication interfaces, and many other functions. It integrates operation and display. 
1) Temperature and humidity display interface: It adopts digital temperature and humidity control. When the relative humidity is ≥ 85%, heating is activated; when the relative humidity is ≤ 77%, heating is stopped. When the environmental temperature is ≥ 40℃, the fan starts to blow air; when the temperature is ≤ 35℃, the fan stops blowing air. When the environmental temperature is ≤ 5℃, heating is activated; when the environmental temperature is ≥ 13℃, heating is stopped. ASD500 can measure and display the temperature and humidity of the on-site environment using an LCD. It has heating, exhaust control contacts, and can be set by yourself to the upper and lower limits of heating, dehumidification, and fan operation as needed.

2) Wireless Temperature Display Interface: The device directly transmits temperature values through the wireless temperature receiver and each wireless temperature sensor, and uses liquid crystal display to show the temperatures measured by each wireless temperature sensor. When the temperature exceeds the high-temperature threshold set by the wireless temperature measurement, an alarm record will be generated, indicating a high-temperature alarm for the node.

3) Partial Discharge Display Interface: The APD300-L magnetic suction device of the partial discharge device is placed inside the switch cabinet. Then, through the second RS485 line of ASD500 (i.e., the rear terminals 85 and 86), the measurement and control device can display the discharge amplitudes, averages, and frequencies of ultrasonic waves (AE), ground electric waves (TEV), and ultra-high frequency (UHF), as well as environmental noise, humidity, and temperature. If the amplitude of AE exceeds the AE alarm threshold and the discharge frequency of AE exceeds 25 times, the AE alarm flag is set to 1; if the amplitude of TEV exceeds the TEV alarm threshold and the discharge frequency of TEV exceeds 25 times, the TEV alarm flag is set to 1; if the amplitude of UHF exceeds the UHF alarm threshold and the discharge frequency of UHF exceeds 25 times, the UHF alarm flag is set to 1.

3.2 Partial Discharge Monitoring APD300-L 
The partial discharge monitoring device of the APD300-L medium-voltage switch cabinet detects the partial discharge signals during the operation of electrical equipment through ultrahigh-frequency sensors (UHF), ground electromagnetic wave sensors (TEV), and ultrasonic sensors (AE), thereby determining whether there are insulation hazards inside the high-voltage electrical equipment, providing early warnings, and ensuring the safe and reliable operation of the power system.

3.3 Wireless Temperature Measurement Sensor ATE40 
The wireless temperature measurement sensor ATE400 can be used for indoor switch cabinets with voltages ranging from 3 to 35 kV, including various types of switch cabinets such as panel-mounted cabinets, drawer-type cabinets, fixed cabinets, and ring-main units; it can also be used for 0.4 kV low-voltage cabinets, including fixed cabinets and drawer-type cabinets. It can be installed on any hot spot within the cabinet and uses wireless data transmission technology to send real-time monitoring data. Then, the temperature data is transmitted to the display device or the remote monitoring system through the receiving device.

4 On-site Installation Photos 
At the site, intelligent control devices ASD500 were installed on the cabinet doors of the 10KV switch cabinets, and partial discharge monitoring devices APD300-L were installed on the cabinet walls of the cable rooms.

5 Conclusion 
The 10KV substation is the core of power distribution, receiving power supply from 110KV high voltage and 400V low voltage. Over time, cables carrying heavy loads are prone to insulation aging, which can damage electrical stability and lead to fires or widespread power outages. Partial discharge monitoring can capture abnormalities in switch cabinets through the amplitude and frequency of discharges, providing a basis for insulation fault repairs. Wireless temperature measurement devices can monitor the temperature rise of electrical contacts in real time, providing timely warnings to prevent accidents. The intelligent control device can monitor and display physical and electrical quantities within the cabinet, featuring safety functions such as live display and anti-misoperation alarms, and can also integrate data from multiple types of sensors. The combined efforts of these three components monitor the equipment and environmental status of the medium-voltage switch cabinets, strengthening the safety and stable operation defense line of the substation.