Low-Voltage Capacitor Voltage capacitor
2014-09-23 20:32:44   Hist：

Low-Voltage  Capacitor Voltage capacitor

UEG (USA electrical) capacitor belongs to cylindrical, self-healing, capacitor dry. Capacitors are used to increase the power factor and improve the power quality, according to different occasions is divided into single-phase and three-phase.

UEG (USA electrical) capacitor element in manufacturing reached 100 clean level in the environment, in the 10-3Bar under the condition of vacuum heating simultaneous perfusion of elements. This method can be used to make the air and moisture discharged from the internal capacitance, thereby avoiding the oxidation of the electrode and partial discharge. After this complex process and strict factory evaluation test and quality, ensure the stability of the capacitor with excellent and long service life.

Technology of microwave pattern cutting edge

UEG (USA electrical) capacitor using high-quality thickening (8 m/9 m) self-healing metallized film. The use of corrugated type special cutting edge design, so that the effective components of metal winding side spraying area increased by 20%.

So that the element and additional connection point has been very good strengthening, to resist high current and ensure the capacitance stability plays an important role in.

Self -healing

When the capacitance overvoltage, overcurrent ornery the useful life is very likely breakdown phenomenon, in a few microseconds can put the metallization layer breakdown, evaporation. This will be in the breakdown region formed an insulating region without metallization layer (the area out of work not to participate in the process of charge and discharge). In the breakdown occurs after the capacitor can work normally. Capacity loss due to self-healing by less than 100P, adopting metal film quality, this product is self-healing density can reach more than 60%.

Self-healing diagram

When the capacitor in overheating, overload or near the lifetime of extremely possible breakdown phenomenon. This will produce a small arc, he in a few microseconds can put the breakdown region metallization layer evaporation, air pressure and here by the high temperature generated by the metal film blowing and melting breakdown region, so that in the breakdown region formed an insulating region without metallization layer, in the breakdown occurs after and the process of the occurrence of capacitor can still work normally.

    1, dielectric

2, metal electrode

3, the replacement of the shock wave materials

4, metal vapor air gap

5, the plasma region

6, the plasma region

The boundary layer between the 7, the gas phase dielectric and plasma zone

8, the breakdown channel

9, the gas phase dielectric

10, alternative metal layer and the dielectric layer(insulating region) region

Safety protection system

Over voltage, over current and fast melting threeweight capacitor overheating protection, overload ornear lifetime produces a lot of gas breakdown, pressure in the capacitance will increase rapidly, which makes the protection device with a groove is opened, the maximum stretching more than 1cm can pull off, when the capacitor instant bear great current shock breaking point can also be fuse protection.

The matters needing attention

1 may not be hindered, elastic elements.

Such as:

Wiring using easy to bend cord Elastic space enough capacitor terminals above. Folding groove cannot be entrapment.

2, the capacitor overload parameter must comply with IEC50831 regulations.

ULBYD single-phase cylindrical miniature low-voltage self-healing capacitor

Verified by practice of many years, adopting metal thin film low voltage shunt capacitor induction less winding has a very good performance in practical application. Suitable for application in civil industry of low voltage reactive power compensation.

The main technical conditions

Over voltage range of Umax 1.1Un (last 8 hours a day) 1.15Un (duration 30 minutes per day) 1.3Un(every 1 minutes duration)

Over current range of Imax 1.3In, the highest 1.8In(higher design under certain conditions)

The surge current capability of Is is less than or equal to 200In, the maximum is less than or equal to 400In

The dielectric loss of Loss is less than or equal to 0.2W/Kvar (20 C ambient temperature)

Capacitance Deviation Co -5%Cn ~ +5% to 15%Cn

The environment temperature is 25 DEG /D, up to a maximum of +55 C

Natural cooling (cooling mode can also be made by rapid cooling conditions)

Environmental conditions is less than or equal to 2000m above sea level (maximum 4000m)

Installation method recommended installed vertically (please specify can also provide other)

Earthling protection for M12 bolts on the shell directly grounding

Safety design of five level safety design: self-healing, dry, over voltage and over current protection, earthling of casing

Protection grade IP20, with protective cover up to IP55 (meet the outdoor use)

Terminal enhanced can touch, bipolar type, the largest 32mm - junction

The product range of rated voltage 100V ~ 500V, the rated capacity of 1 ~ 100Kvar (> 30Kvar using parallel combination)

GB/T1274.1&2-2004 technical standards

IEC60831-1 (1996/2002) IEC60831-2 (1995)

Selection