AFM 4/6/8/12/12√3KV 2-334kvar High Voltage AC Filter Power Capacitors for Oil Immersion Filters

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Product Description

AFM, AAM full-film AC filter capacitor This product is mainly used as a filter component, and is connected with other devices (such as reactors, etc.) to form an AC filter capacitor. It is used in electrical equipment with harmonics to prevent harmonics from affecting the power grid. pollution, or connected to the power system. It is used to provide a low impedance channel for a harmonic current to achieve the goal of reducing the harmonic level of the power grid and improving the power factor of the system.

Model Description

Technical parameters and structure dimensions

Main Specifications
1. Rated voltage: 1.2~12kv;
2. Rated frequency: 50Hz or 150Hz, 3 Capacitance deviation: -5%-+5%,
For the filter with channel, the difference between the measured capacitance value of the capacitor and the rated value should not exceed ±5% of the rated value
For high channel filters, the difference between the measured capacitance value of the capacitor and the rated value should not exceed ±7.5% of the rated value
The capacitance of the capacitor is taken as a symmetrical deviation, and the specific deviation is determined by the user and the factory through negotiation.
Loss tangent (tg δ) ≤ 0.0005
■Execution standard: GB/T11024-2001 standard "Parallel capacitor for AC power system with nominal voltage above 1KV"
■Stable overvoltage:
The capacitor's continuous operating voltage is 1.0Un, and it can operate for a corresponding time under the total rated harmonic voltage Un plus the fundamental voltage specified in the table below.

Product features and scope of use

1. The capacitor is mainly composed of the shell, the core and the outlet sleeve. The outer shell is welded with thin steel plate or stainless steel plate. The cover is hanging welded with the outlet sleeve. The two side walls are welded with climbers for installation and lifting. The core is composed of components. , composed of insulating parts. The components are rolled with polypropylene film as the medium and aluminum foil (plate) or with polypropylene film and capacitor paper as the medium and aluminum foil.
2.Small size, light weight and good performance
3. Small loss, low temperature rise, long life
4. The use of insulating oil with excellent performance to supply base armor does not allow the production to run at a low temperature of minus 40 ℃

Use environmental conditions：
The altitude of the installation and operation area does not exceed 2000m, and plateau capacitors can be provided for areas with an altitude higher than this limit. The ambient air temperature range in the installation area is -25/+45°C and -40/ +40°C. For outdoor (indoor use) use, the installation site should be free of harmful gases and vapors, no conductive or explosive dust, and no severe mechanical vibration. Products suitable for special environmental conditions are available on request.

Ordering information

The selection of the rated voltage of the capacitor must be based on the network voltage. Considering that the input of the capacitor will increase the voltage, so when selecting the rated voltage of the capacitor, it is at least 5% higher than the network voltage ; when there is a reactor in the capacitor circuit, the terminal voltage of the capacitor The ground increases with the reactance rate of the reactor in series, so when selecting the rated voltage of the capacitor, it should be determined after calculation according to the reactance rate of the reactor in the string. Capacitors are low-impedance channels of harmonics. Under harmonics, a large amount of harmonics will be injected into the capacitors to make the capacitors overcurrent or overvoltage. In addition, the capacitors will amplify the harmonics and cause resonance when they expire, endangering the safety of the power grid and making the capacitors lifespan. Therefore, capacitors with large harmonics must be used under reactors that suppress harmonics. The inrush current when the capacitor is closed can be as high as hundreds of times of the rated current of the capacitor. Therefore, the switch for switching the capacitor should choose a switch without re-breakdown. In order to suppress the closing inrush current, a reactor that suppresses the inrush current can also be connected in series. After the capacitor with internal discharge resistance is disconnected from the power supply, it can drop from the peak value of the rated voltage to below 75V within 10 minutes . be explained when. Capacitors used for line compensation should be installed at 150~200kvar in one place, and be careful not to install the capacitors on the same stage as the transformer, and do not use the same group of dropouts to prevent overshooting caused by ferromagnetic resonance when the line is not running in all phases. Current overvoltage can damage capacitors and transformers. The zinc oxide surge arrester for the protection of operating overvoltage should be selected for the zinc oxide surge arrester dedicated to the capacitor, and it is best to install it between the capacitor poles. The fuse specially used for capacitor is selected for quick-break, and the rated current should be selected according to to 1.42~1.5 times of the rated current of the capacitor. When the capacitor is directly connected to the high-voltage motor in parallel, in order to prevent self-excitation when the motor is disconnected from the power supply, causing the voltage of the capacitor terminal to rise greater than the rated value, the rated current of the capacitor must be less than 90% of the no-load current of the motor; When using Y/△ wiring, it is not allowed to connect the capacitor directly to the motor in parallel, and a special wiring method should be adopted. When the capacitor is used at an altitude higher than 1000 meters or the capacitor is used in the humid tropical zone, it should be stated when ordering. Special spe certifications or special requirements for capacitors should be specified when ordering.