1 high-power devices with fast load changes, such as welding machines, will cause the voltage drop of distribution network, the dropping voltage depends on the load power and short-circuit capacity of distribution network . secondary voltage drop of the transformer reflected to the primary side, leading the deterioration of the distribution network affects the whole transformer circuit.

(2) the impact of distribution network voltage-drop depends on the amplitude and frequency of the dropping voltage .Thyristor Switched filter can be inhibition of these effects and ensure the voltage of distribution network conform to the standard.

3 due to support and stabilize the power grid voltage, Thyristor Switched tuning filter can reduce the energy consumption of manufacturing equipment, it can improve its productivity.

For industry:

1 apply to rapidly changing loads: such as iron and steel industry, welding machine load and the industry that using elevators, driving.

2 thyristor switching tuned filter with fast switching capability can be used to support the distribution system voltage , improvement of load power factor.

3 thyristor switches have no mechanical wear, operation with no noise, and has advantages of no transient .

4 The control signals can be sent directly from the load to the tuning filter, which means that the power factor improvement with minimal delay.

5 control system make the minimal time of input and removal of the tuning filter only be 20ms in all segments
6 Each tuning filter consists of a capacitor and a reactor in series, the two components form a series resonant circuit, the resonant frequency below the lowest harmonic frequency present in the system (such as 150Hz, 250Hz).

7 choice of tuning filter depends on the control requirement , and in accordance with the required amount of reactive power compensation and load types, the load can be symmetric or asymmetric, can also be connected to the linear-voltage or phase-voltage.

8 In order to make power factor correction of high-speed welding machine achieve the best possible results, the control signal directly sended from the welding machine to the tuning filter, the tuning filter power factor compensation is based on the needs of reactive power.

Features:

Thyristor Switched tuning filter compensate power factor for the load changed greatly, such as elevators, cranes and rolling mill,. thyristor switch make switching speed faster than contactor, also reduces the work of maintenance and replacement as contactor is easy to wear .
control system input and removal of each tuning filter according to the needs of Reactive power:

1. “the earlier input the latter removal” principle, the first filter to be input then the final cut.

2. “the earlier input the earlier removal” principle, the first filter to be input then the first cut.

3. “Loop input removal” principle, system for the same capacity using this model .

Technical parameters:

System voltage: 400 ~ 690V

Rated capacity: 50 ~ 300KVAR / cabinet

Cabinet Dimensions: width × depth × height (mm)

1000 × 800 × 2000/300kvar

Install location: indoor

Temperature range: minimum 0 ℃, the highest 45 ℃, maximum of 24-hour average temperature is +35 ℃,annual average maximum +25 ℃.

Protection: IP20

The number of segments per container: 6

Standard: IEC 60831 EN 60439-1

Color: light gray RAL7032

Because of its switching devices are IGBT, so its dynamic compensation effect is higher than phase modifier, capacitors and reactive power compensation device. reactive power compensation device with its lower harmonics, high efficiency, fast dynamic response become a important equipment in modern flexible AC transmission system, The device is mainly used to compensate for reactive power which is fluctuated frequently, suppressing flicker and harmonic in grid and improve power factor, improve the quality and efficiency of distribution network, thereby reducing network losses and help to extend the service life of transmission line .