1, overview

The ore furnace is a kind of high energy consumption electric smelting furnace, which has the characteristics of electric arc furnace. Because of its low resistance, the power factor of electric arc furnace is lower than that of other electric smelting furnace. In order to reduce the loss of power grid, improve the quality of power supply, Power Supply Bureau requires the power factor of the power supply enterprise to be more than 0.9, or to use electric enterprises to impose high fines. At the same time, the power factor is low, and it can also reduce the line voltage of the ore smelting furnace. The large capacity submerged arc furnace to install reactive power compensation device, in order to improve the power factor of submerged arc furnace, improve product quality, improve product yield, reduce power consumption per ton.

2, the use of environmental conditions

2.1 ambient air temperature: -25 ~ +50.
2.2 relative humidity: 40 DEG C = 50%, C = 90% 20.
2.3 workplace: indoor or outdoor
2.4: altitude less than 2000 meters (note when the elevation is higher than 2000 meters with plateau type capacitor)
2.5 the installation of the gradient is not more than 5 degrees.

3, the main parameters and their technical characteristics

3.1 main technical parameters
3.1.1 rated voltage: 0.2KV AC
3.1.2 rated frequency: 50HZ
3.1.3 switching mode: vacuum contactor, high power thyristor module
3.2 technical features:
3.2.1 independent research and development of special application and mine thermal furnace low voltage compensation of dry self-healing capacitor, using imported high quality polypropylene film manufacture its surface after rough processing, stable performance, high resistance to electricity. Capacitor shell adopts high quality aluminum rectangular shell, top with piping sealing process, not only solve the problem of heat dissipation of capacitor, preventing electromagnetic induction loss can prevent dust from entering inside the capacitor, so as to ensure the safe and reliable operation of capacitor.
The goal of 3.2.2 control algorithm, the zero sequence current and negative sequence current compensation to a minimum, while the power factor is increased greatly, reduce the iron loss, copper loss and short net loss of transformer. The device has RS232/485 communication interface, communication mode can be used in the field of communication or remote communication, can achieve real-time call or real-time call.
3.2.3 single phase capacitor using angle type wiring, namely AB, BC, CA phase can be controlled separately, so as to achieve the equivalent of the entire set of capacitor cut.
3.2.4 according to the size of the reactive power compensation, does not generate the oscillation. At the same time, it can effectively eliminate the phenomenon of reactive power supply and high voltage, so that the furnace condition is kept in a stable state.
3.2.5 can not damage the frequent switching capacitor, with switching delay adjustable control, have the function of loop switching, no harmonic, no harmonic amplification, anti interference is very strong. Can be based on user requirements for the installation of a limited flow or filter reactor.
3.2.6 products with short circuit protection and isolation protection, when short circuit and other internal faults, can automatically cut off the single loop circuit, as well as temperature protection, temperature detection, to ensure the safe operation of the equipment.

4, the implementation of standards

GB/T15576-2008 low voltage complete reactive power compensation device
JB/T9663-1999 low voltage reactive power automatic compensation controller
Self healing shunt capacitors for AC power systems with nominal voltage 1KV and below GB12747.1-2004
GB4208-2008 enclosure protection rating (IP code)
Data transmission protocol of DL535 power load control system
JB/T10695-2007 low voltage reactive power dynamic compensation device
GB/T14549-1993 power quality utility grid harmonic