With the widespread use of power electronic devices, nonlinear loads continue to increase, and the harmonic content in the power grid also continues to rise. Harmonic pollution poses a potential threat to the stability and economic operation of the power system, and has a great impact on the surrounding electrical environment. For example, consuming the reactive power reserve of the power system; Increase transmission line losses; Increased the additional harmonic losses of the motor, causing it to generate heat and shorten its service life; Causing significant errors in electrical energy measurement; Causing important and sensitive automatic control and protection devices to malfunction, resulting in increased incidents of misoperation and refusal to operate, leading to decreased reliability.

The TZY-XB500B harmonic online monitoring device is a new generation product of our company, which can monitor and analyze the fundamental waves and 2-30th harmonics of the voltage and current of the busbar and lines in the power grid in real time. It can give an alarm for harmonic exceeding the limit and upload the data to the background monitoring system through RS485 or RS232 communication interface, meeting the user's monitoring requirements for power quality.

This device is widely applicable to power plants, substations, petroleum, coal mines, steel, metallurgy, chemical and other large-scale industrial and mining enterprises with voltage levels ranging from 380V to 220kV.

▶  Adopting industrial grade processors, it has fast computing speed, stable working state, and strong anti-interference performance.

▶  The device adopts frequency automatic locking technology, which can still obtain correct analysis results even when the system frequency changes.

▶  Based on the principle of fast Fourier transform, the calculation results are fast and accurate, and can be used for daily monitoring of the fundamental wave, 2nd to 30th harmonic voltage, current, and total harmonic distortion rate of power lines.

▶  The human-machine interface is friendly, with Chinese characters displayed, and the operation is simple and intuitive.

▶  The device can record 60 out of limit records.

3.1 Environmental Requirements

▶  Indoor use should have good ventilation.

▶  Environmental temperature: -10 ℃ to+50 ℃

▶  Relative humidity: less than 90%, no condensation on the surface.

▶  Atmospheric pressure: 80-110Kpa.

▶  Altitude:<2000m.<>

▶  The surrounding medium should be free of conductive dust, corrosive gases, molds, etc. that can cause metal or insulation damage.

3.2 Technical Parameters

▶ Working power supply: AC/DC220V (please specify when ordering if there are special requirements), power consumption ≤ 20W.

▶  Signal measurement range: Voltage: 5~450V; PT circuit power consumption: 0.5VA/phase.

▶  Current: 0.06A~6A; CT circuit power consumption is 0.5VA/phase.

▶  Communication interface: RS232/485 (choose one, please specify when ordering), baud rate 600-19200bps.

▶  Communication protocol: Internal protocol interface (serial port 1).

▶  103 protocol/modbus (serial port 2).