Single phase self healing low voltage shunt capacitor

Main purpose and scope of application
Self-healing low-voltage shunt capacitors are suitable for low-voltage power systems with a frequency of 50 days or 60 days. They are mainly used to improve power factor, reduce reactive power loss, improve voltage quality, and tap transformer capacity. It is the best energy-saving product strongly recommended by the country.
This product complies with: National Standard GB/T 12747.1&2-2015 (our company is the main drafting unit of this standard).

Working conditions After the
capacitor is cut off from the power supply, it must be ensured that the remaining voltage of the capacitor drops to j0% of the rated voltage before it is allowed to be switched on again. Normally, this time will take about 200s. Controller. If a general controller is used, a quick discharge facility must be installed separately. For the use of equipotential switching switches, this limit is not required.
The altitude does not exceed 2000m. The
ambient temperature category is 25/C, the minimum temperature is 25t, and the maximum temperature is category C. (The maximum temperature does not exceed 50CC, the average temperature within 24 hours does not exceed 40t, and the average temperature within one year does not exceed 30'C) . Capacitors should be guaranteed to work under well-ventilated conditions, and not allowed to work in a closed and unventilated environment.

Note: The subscript "L" means that the capacitor has a built-in reactance coil. Large-capacity capacitors should not be charged with reactive coils, which will cause loss and excessive temperature rise, which will affect the service life and energy consumption of the capacitors. It is not conducive to energy saving. It is better to adopt other methods to limit inrush current. The charged reactor coils in the capacitors cannot be used. Used to suppress harmonics.

Main technical parameters
Rated voltage: 230V, 400V, 450V, 480V, 525V, 690V, 750V, 1200V, other voltages can be ordered specially.
Rated capacity: 0.4-0.69kv and 1-60kvar, the capacity of other voltage levels will be determined separately.
Rated frequency: 50Hz or 60Hz.
Capacity tolerance: -5%-+10%.
Loss angle tangent: tanδ ≤ 0.1% at 20°C.
Withstand voltage: 2.15 times the rated voltage between poles for 5 seconds, between pole shells 2Un+2kV or 3kV, whichever is higher, 10 seconds, no permanent breakdown or flashover.
Maximum allowable overvoltage: when 1.1 times the rated voltage, no more than 8 hours per 24 hours; when 1.15 times the rated voltage, no more than 30 minutes per 24 hours; 1.2 times the rated voltage, no more than 5 minutes; 1.3 times At rated voltage, no more than 1 minute.
Maximum allowable current: allowable current does not exceed 1.3 times the rated current to run. Transient overcurrent, considering the influence of overvoltage, positive capacitance deviation and harmonics, the maximum transient overcurrent does not exceed 1.43 times the rated current. Connection: △ angle connection, ya star connection, ya star connection to neutral point lead, Sichuan three-segment type , Single-phase and other connection methods, other connection methods are negotiated according to user needs.
Self-discharge performance: 3 minutes after the capacitor is powered off, the remaining voltage drops from Pan Un to below 50V.
Compliance with standards: GB/Ti 2747-2015, 1EC60831:2014.

Structural features
◆Small size, light weight, easy to install
Using high-quality high-temperature resistant metalized polypropylene film new material as the medium, and unique structural design make the capacitor volume and weight only 1/4 and 1/50 of the old product
◆Low loss , Low heat generation, low temperature rise. The
use of new gold spraying technology and unique metalized film edge thickening technology greatly enhances the anti-surge capacity of the capacitor, stable performance, greatly prolonged working life, and the capacitor's own energy consumption is reduced. The actual value is less than 0.08 %, less heat, low temperature rise, and good energy saving effect.
◆Excellent self-healing performance The
local breakdown of the medium can quickly self-heal and resume normal operation, which greatly improves the reliability.
◆Safety
Built-in self-discharge resistance and safety device, safe and reliable to use.
◆Dry structure does not leak oil, safe and environmentally friendly.
The latest developed microcrystalline wax is used. It is solid at room temperature and has a dripping melting point higher than 700C. The entire unit is immersed under high vacuum. It has stable performance, no oil leakage, safety and environmental protection during use. It not only has the characteristics of dry structure, but also has the advantages of vacuum impregnated capacitors. In addition, the unique dipping process makes the operation of the capacitor more reliable.
◆Corrosion-resistant and anti-counterfeit metal shell, beautiful and firm. The
metal shell has undergone special double anti-corrosion treatment, which greatly improves the corrosion resistance. It has a unique anti-counterfeit design and is fine and beautiful.

Ordering and use instructions
◆The selection of the capacitor's rated voltage must be based on the network voltage, and consider that the input of the capacitor will increase the voltage. Often the actual voltage of the network is much higher than the nominal voltage of the network. The capacitor voltage level should be at least 5% higher than the grid voltage. For example, at least 400V capacitors should be used for 380V grids, and at least 690V capacitors should be used for 660V grids. Especially when the capacitor loop has a reactor in series, the voltage on the capacitor terminal will increase correspondingly with the reactance rate of the series reactor. At this time, the rated voltage of the capacitor should be calculated according to the series reactance rate. The selection of the capacitor's rated voltage should not blindly pursue the higher the better. When the voltage is selected higher and the actual use voltage is lower, the actual output capacity of the capacitor will be greatly reduced.
◆Capacitors cannot use the measured current to judge whether the capacitor is qualified. It should be judged by measuring the capacitance value of the capacitor with a microfarad meter. Three-phase capacitor: The actual measured value of the capacitance between any two terminals should be one-half of the total capacitance value marked on the nameplate of the capacitor, and the error is within -5%~10%. Single-phase capacitor: The measured value of the capacitance between the two terminals should be the total capacitance value marked on the nameplate of the capacitor, and the error should be within -5%~10%.
◆Our company is a temperature category C capacitor. The maximum ambient temperature should not exceed 5OC, the average temperature within 24 hours should not exceed 4OC, and the average temperature within one year should not exceed 3OC0.
◆Capacitors are low impedance channels for harmonics. A large number of harmonics are injected into the capacitor, which will reduce the partial discharge performance of the capacitor and over-current and over-voltage. The capacitor will also cause harmonic amplification or even resonance, endanger the safety of the power grid, and greatly reduce the life of the capacitor. Especially metallized capacitors, because of their structural characteristics, are most afraid of harmonics, so the capacitors must be used in series with harmonic suppression reactors where the harmonics are large. In developed countries abroad, it is rare to see the use of non-string suppressing harmonic reactors. Rectifier equipment, intermediate frequency furnace, electric arc furnace, power electronic devices (variable frequency speed regulator, thyristor voltage regulator, thyristor control equipment, inverter power supply, frequency conversion and induction heating occasions), magnetic iron core equipment (transformer, power frequency Induction furnaces, electric welders, low-quality motors) are all sources of harmonics.
◆When ordering capacitors, be sure to order correctly according to the method of capacitor model marking. For example, 380V network capacity 15kv& three-phase BSMJ capacitor, when ordering, you should choose the model: BSMJ-O.4-1 5-3.
◆The remaining voltage of the capacitor must be lowered to less than 1O%Un. After disconnecting the power supply for 5mmn, it can be touched or tested by short-circuit discharge to prevent personal electric shock or damage to the test equipment.
◆When the load is light, that is, when the transformer is at no load or light load, the capacitor must be removed. It is not allowed to put the capacitor without any measures. In severe cases, harmonic amplification will occur, damage the capacitor or even burn the transformer.
◆The capacitor is capacitive. When connected to the inductive load of the power grid, the two parameters of capacitive and inductive will resonate at a certain coincidence. This must be estimated when using capacitors. Resonance calculations must be carried out in advance for the design of each grouping capacity of the capacitor device. Avoid resonance points.
◆When the capacitor is fixedly connected to the motor (commonly known as in-situ compensation), the capacity of the capacitor must be selected so that its current is less than 0.9 times the motor's excitation current. (For special equipment without inertia when the motor is stopped, this list is not required).
◆When the motor is equipped with a Y/△ starting device, the local compensation capacitor should be used according to a specific connection method. It is wrong to simply connect it to the motor in parallel.
◆The power factor control type controller is prone to switching oscillation when a large-capacity capacitor is put into light load, so the controller should choose a reactive current or reactive power controller that will not cause switching oscillation.
◆Capacitors can only be used upright, not lying down.
◆When selecting a circuit breaker for protection, it should be selected according to 1.5 times the rated current of the capacitor, and the instantaneous current setting value is l0in. It is strictly forbidden to operate the circuit breaker to open and close the capacitor.

Main specifications

Shape and installation dimensions

Shape and installation dimensions of single-phase capacitors