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DT801 Online monitoring device for zinc oxide surge arresters in substations

DT801 Online Monitoring Device is designed for zinc oxide surge arresters in substations with voltage levels of 110kV and above. This distributed system effectively monitors total and resistive current in real-time to improve safety through early warning and risk analysis.

This online monitoring device is suitable for zinc oxide surge arresters in substations with voltage levels of 110kV and above.

The DT801 surge arrester online monitoring device can effectively monitor the total current and resistive current of zinc oxide surge arresters in substations in real time. It boasts advantages such as high accuracy, good stability, and powerful functionality. It can be integrated with electrical equipment condition assessment systems for condition-based maintenance, evaluation, early warning, and risk analysis, effectively improving the safe operation level of zinc oxide surge arresters in substations.

The DT801 system consists of a voltage monitoring unit and a current monitoring unit. This system adopts a distributed architecture, allowing for flexible configuration based on actual field monitoring conditions, thus improving system reliability and flexibility.

Schematic diagram of online monitoring device for surge arresters

1) Flexible Configuration

Utilizing a node-based design, adding or removing monitoring equipment and items does not require altering the system structure. Different types and quantities of local monitoring units can be connected to the central early warning server as needed, enabling monitoring and diagnostics of various devices.

2) Simple Installation

Simply install the corresponding monitoring unit below the electrical equipment being tested, connecting it to the monitoring device’s bus via a single

cable.

3) Accurate Measurement

Employing high-precision and high-stability zero-flux current sensors, and employing advanced digital signal analysis and digital communication technologies, ensures accurate phase measurements, thus resolving issues related to the accuracy and stability of parameters such as dielectric loss, capacitive current, and resistive current.

4)Reliable Data

Each monitoring unit possesses comprehensive self-testing capabilities, promptly determining its operational status and uploading data to the server and users. All monitoring data is transmitted digitally, completely eliminating signal transmission problems caused by power frequency electromagnetic interference or other high-frequency interference, thereby improving the reliability of the monitoring system.

5) Simple Maintenance

All monitoring units adopt a modular design, possessing high versatility and interchangeability. Maintenance of all components, including sensors, can be performed without affecting equipment operation.

Safe and Reliable

Main monitoring parameters of surge arrester online monitoring device

Monitoring Parameters	Measurement Range	Measurement Accuracy
Total Current	100μA～50mA	±（Standard Reading×5%+5μA）
Resistive Current	10μA～10mA	±（Standard Reading×5%+5μA）

2,Other monitoring parameters

Monitoring Parameters	Measurement Range	Measurement Accuracy
Bus voltage:	35kV～1000kV	±0.5%
System frequency	45Hz～65Hz	±0.01Hz
Harmonic current	3rd, 5th, 7th, 9th orders	±5%
Harmonic voltage	3rd, 5th, 7th, 9th orders	±5%
Ambient temperature	-40℃～+80℃	±0.5℃
Ambient humidity	0～100%RH	±2%

For more information about this product, please download the brochure from here, or contact Britop directly.
Contact information:
For international sale, please contact:
Qingdao Britop International Trading Co.,Ltd.
Website:                     https://qdbritop.com
Contact:                     Bright Meng
Email:                         britop@qdbritop.com
Tel (Wechat): +8613811458455