FFM series protective capacitorsDetailed product description：

summary:
The FFM series protective capacitors are connected in parallel with the vacuum switch. When the vacuum switch is connected to an inductive load, it can not only limit the operating overvoltage within a certain range, but also delay the rise time of the cut-off overvoltage and reignition overvoltage waves, reduce steepness, and protect the insulation of electrical equipment from the front edge impact of the shock wave. Composed with resistors, it is used in 50HZ, 3KV, 6KV, 10KV, and 35KV power systems to reduce amplitude by absorbing energy through capacitors. The damping effect of resistors attenuates oscillations, preventing overvoltage; At the same time, do not limit the neutral grounding method to ensure compatibility with the motor edge level and improve the quality of power supply in the grid.
In other situations, it can also be used as a high-voltage capacitor. When connected between the line and ground, it can reduce atmospheric overvoltage, wavefront steepness, and peak to peak values.
Cooperating with lightning arresters can protect electrical equipment; The supporting capacitor used for the RC overvoltage absorption device of the vacuum circuit breaker system.

Technical performance and requirements of FFM series protective capacitors:
1. The capacitance deviation is 5%~+10%.
2. Tangent value of dielectric loss angle tan at rated voltage UN, 20 degrees:
For film paper composite media, tan is less than or equal to 0. 002.
For full film media, tan is less than or equal to 0. 0005.
3. Rated frequency: FN=50HZ.
4. The container can be in 1. Long term operation under 1UN, and able to withstand the first peak value less than or equal to 2. Operating overvoltage caused by the opening and closing of circuit breakers, ranging from 5 to 2UN.
5. The container can be in 1. Under long-term operation at 5LN, this current includes both the current caused by steady-state overvoltage and the current caused by harmonics, as well as the current increased by capacitance deviation.
6. Cooling method: Natural convection of air on the surface of the capacitor casing.
7. The altitude of the installation and operation area shall not exceed 1000M;
Range of ambient air temperature in the installation and operation area:
Indoor -40~+45 degrees; The relative humidity of the air is less than or equal to 95%.
8. The installation and operation site should be free of corrosive gases and vapors; No conductive or explosive dust and severe mechanical vibration.
9. The surface of the capacitor porcelain bushing should not accumulate a large amount of dust and dirt. If oil leakage is found, it must be shut down.

model	rated voltage Un/Kv	Rated capacitance Cn/uF	remark	model	rated voltage Un/Kv	rated voltage Cn/uF
FFM6.6/√3-0.3	6.6/√3	zero point three		FFM4.62-25	6.6/√3	zero point three
FWF10.5/√3-0.1	10.5/√3	zero point one		FFM4.65-25	10.5/√3	zero point one
FWF10.5/√3-0.2	10.5/√3	zero point two		FFM6.9-0.5	10.5/√3	zero point two
FFM11/√3-0.2	11/√3	zero point two		FWF10.5/√3-0.025	11/√3	zero point two
FFM11/√3-0.5	11/√3	zero point five		FFM12-0.4	11/√3	zero point five
FWF13.8/√3-0.5	13.8/√3	zero point five		FFM24-0.26	13.8/√3	zero point five
FWF35/√3-0.1	35/√3	zero point one		FWF35/√3-0.1G	35/√3	zero point one
FFM35/√3-0.1G	35/√3	zero point one		FFM35/√3-0.1	35/√3	zero point one

FFM series protective capacitors