ESS960U voltmeter is an instrument used for power system monitoring and measurement. It integrates current and voltage measurement functions and can be used to monitor current, voltage, power factor and other parameters in three-phase AC circuits. This multi-functional voltmeter is usually used for power quality analysis, energy consumption monitoring, fault diagnosis, and signal feedback in automatic control systems. Its main features include:

1. 1. Wide range of measurement capabilities: ESS960U is able to measure a wide range of current and voltage ranges to adapt to different power system needs.
2. 2. High precision: This combination meter has high-precision measurement functions and can provide reliable data.
3. 3. Communication interface: It may have communication interfaces such as RS-485 and Modbus to facilitate connection with computers or automation systems to achieve remote data transmission and centralized management.
4. 4. Digital display: With digital display, measurement parameters can be read directly.
5. 5. Alarm function: Threshold alarm can be set. When the current or voltage exceeds the preset safe range, an alarm will be issued.
6. 6. Recording function: It may include a data recording function, which can store measurement data over a period of time to facilitate subsequent analysis and review.

The ESS960U multifunctional voltmeter is an important monitoring device in the power system. It can help users understand the operating status of the power system in real time, ensure the stable operation of the power system, and also facilitate users to manage energy consumption and save energy and reduce emissions. ESS960U three-phase current and voltage combination meter plays multiple roles in the power system. The main functions include:

1. 1. Real-time monitoring: This combination meter can monitor changes in three-phase current and voltage in real time to ensure the stable working status of the power system. With real-time data, operators can quickly identify potential problems or anomalies.
2. 2. Data recording and analysis: ESS960U may have a data recording function that can record current and voltage data over a period of time. This data is critical for power system maintenance, fault analysis, and energy consumption analysis.
3. 3. Fault diagnosis: By monitoring the imbalance of current and voltage, faults in the power system can be diagnosed, such as phase-to-phase short circuit, single-phase grounding, etc., so that repair measures can be taken in a timely manner.
4. 4. Energy management: The combination table can provide accurate energy consumption data to help power users and managers manage and optimize energy to achieve energy conservation and emission reduction.
5. 5. Protection and alarm: ESS960U usually has overload protection and alarm functions. When the detected current or voltage exceeds the preset safety range, an alarm will be triggered to protect the safety of equipment and personnel.
6. 6. Integration with automation systems: The combination meter may have communication interfaces, such as RS-485, Modbus, etc., and can be integrated with SCADA (supervisory control and data acquisition) systems or other automation systems to achieve remote monitoring and control.
7. 7. Power quality analysis: By measuring parameters such as power factor, the quality of the power system can be evaluated, which is of great significance for ensuring equipment performance and reducing grid losses.

To sum up, the ESS960U three-phase current and voltage combination meter is an indispensable monitoring and measurement tool in the power system. It helps to improve the reliability, efficiency and safety of the power system.