1. The scope of use

The over-voltage online monitor produced by our company is an intelligent discharge recording instrument with a high-performance microprocessor as the core component. It is a precision electronic instrument. When used, it must meet the following tasks under the premise of non-special requirements and permits. condition:

1. Power supply voltage: 220V±5% AC/DC

2. Input signal: ≮200A peak

3. Ambient temperature: -5℃ ～＋45℃; average temperature within 24 hours: <＋40℃

4. Altitude of installation site: 2000m and below

5. Atmospheric conditions: the average maximum relative humidity of the wettest month of the installation site is less than or equal to 90%, and the average temperature of the month is less than or equal to +25°C

For damage caused by unauthorized use beyond the scope of the warranty period (see the warranty clause on the following page for the warranty period), our company is not responsible for the warranty, but can provide paid maintenance services.

This product is a supporting product of our company's three-phase combined overvoltage protector. It can monitor the overvoltage of the system online in real time, and record the time and phase of the overvoltage. It can also be used in other places that meet the requirements and require overvoltage recording. .

After you receive the over-voltage online monitor, please carefully open the outer packaging of the product, and check the accessories according to the carton packing list on the next page. If there is any damage or missing, please contact our sales department through appropriate channels. Our company will do so in the shortest possible time. Solve the problems you find.

2. Packing list

For newly purchased products (reworked products and replacement products are not included in the scope of this list), when you open the box, please check the accessories according to the following list (for optional products, please consult our company):

3. Brief introduction of function and principle

Once the protected equipment generates overvoltage, the combined overvoltage protector protects the equipment by increasing its own current to discharge the overvoltage energy, and the protector action current is input to the monitor via a high-performance signal sensor. The input signal is photoelectrically isolated, signal shaped, and input to the microprocessor. Once the microprocessor receives the signal, it will immediately query the three input signals, and record and process the query results and the corresponding time. The initial time of the system can be set by keyboard input; the recorded results can be arbitrarily searched; the stored recorded results can be cleared when necessary.

The display output part includes a six-digit digital display and four-way signal lamp indication. Under normal circumstances, the LCD part displays the real-time time and the running signal lamp flashes; when an overvoltage occurs, the overvoltage phase signal part indicates the current discharge phase situation; the query result is displayed during query . Power monitoring and power-down protection circuit can ensure that all recorded results are saved in the case of system reset and power-off. Through the RS485 serial communication interface, data transmission can be carried out with the upper computer.

4. The functions and characteristics of the overvoltage online monitor are as follows:

1. The anti-interference design of the device is not to be interfered by the strong magnetic field generated by overvoltage. The input signal range: 0.1mA~200A.

2. It has the function of indicating the discharge phase signal at the current moment.

3. With discharge time recording function, it can be recorded in phases, divided into seven forms of phase-to-phase and phase-to-ground.

4. The discharge record content can be arbitrarily inquired.

5. The internal clock of the instrument can still ensure accurate timing after power failure, which can avoid the trouble of adjusting the time after power failure.

6. The data in the memory has a power failure protection function, which can ensure that the recorded data will not be lost during the storage period (100 years).

7. Designed with RS485 communication interface, which can realize multi-computer networking and data transmission with the upper computer, and form the required data file on the upper computer and perform operations such as saving, editing or printing.