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The fast harmonic-resistant intelligent power capacitor is designed for the situation where the harmonic content of the power network is large, the reactive power changes rapidly, and ordinary power capacitors cannot operate normally. It uses special technologies and processes and is composed of a circuit breaker, a thyristor, a reactor, and an aluminum-shell low-voltage power capacitor. It has the characteristics of fast response speed, zero-crossing switching of the capacitor, no inrush current impact, effectively prolonging the service life of the capacitor, no amplification effect on harmonics, and the ability to absorb some harmonics.
Here, I'd like to introduce a dehumidifier manufacturer to you. A product called the CSL-8000 series micro dehumidifier under its brand has won a lot of praise in the industry. In the eyes of consumers, the CSL series products have very significant features. It has high cost performance. For consumers, high cost performance is almost...?
At about 19:00 yesterday, in a resident's home on the 3rd floor, Unit 1 of Yishuiyuan, a white square box the size of a mooncake was seen placed beside the dining table. The screen shows the date, time, and the indoor temperature of 21.2℃. This is the wireless remote room temperature monitor. "The heating company installed it at 15 o'clock. They said it should be placed in the room more than 1 meter above the ground and less than 1 meter below the ceiling, away from doors, windows, and radiators, and it cannot be moved casually."Intelligent Reactive Power CompensationCapacitoris an intelligent reactive power compensation device for reducing line losses, improving the power factor, improving the power quality, and saving energy and reducing consumption in the 0.4kV low-voltage distribution network. Based on theIntelligent Reactive Power CompensationControllerThe designed reactive power compensation scheme can refer to the following principles
| Non-linear load ratio | Reactive power compensation design scheme | | | |
| Three-phase balanced static load | Three-phase unbalanced static load | Three-phase balanced frequently changing load | Three-phase unbalanced frequently changing load | |
| Non-linear equipment in the load ≤ 15% of transformer capacity (mainly linear load) | Three-phase common compensation, composite switch zero-crossing switching, | Phase-separated compensation or hybrid compensation, Composite switch zero-crossing switching; | Three-phase common compensation, thyristor switch dynamic switching | Phase-separated compensation or hybrid compensation, Thyristor switch dynamic switching; |
| 15% | Three-phase common compensation Composite switch zero-crossing switching A 6% or 12% filtering reactor is connected in series in the capacitor circuit | Phase-separated compensation or hybrid compensation Composite switch zero-crossing switching A 6% or 12% non-tuned filtering reactor is connected in series in the capacitor circuit | Three-phase common compensation Thyristor switch dynamic switching A 6% or 12% non-tuned filtering reactor is connected in series in the capacitor circuit | Phase-separated compensation or hybrid compensation Thyristor switch dynamic switching A 6% or 12% non-tuned filtering reactor is connected in series in the capacitor circuit |
| Harmonic governance target | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and higher harmonics in the system | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and higher harmonics in the system | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and higher harmonics in the system | Destroy the parallel resonance between the capacitor and the system, and partially absorb the 3rd, 5th, 7th and higher harmonics in the system |
| The ratio of non-linear equipment in the load > 50% of the transformer capacity (there are a large number of harmonics) | Three-phase common compensation Zero-crossing switching of composite switch Tuned filter circuit composed of capacitor or reactor | Phase-separated compensation or mixed compensation Zero-crossing switching of composite switch Tuned filter circuit composed of capacitor or reactor | Three-phase common compensation Dynamic switching of thyristor switch Tuned filter circuit composed of capacitor or reactor | Phase-separated compensation or mixed compensation Dynamic switching of thyristor switch Tuned filter circuit composed of capacitor or reactor |
Factories will suffer losses due to the damage of products and equipment. Since this problem has been discovered, scientists cannot sit idly by, so dehumidifiers have been developed. The development of industrial dehumidifiers in China has a history of more than a decade, but it is still in its primary stage. The overall capacity is very limited, and the scale has not been formed yet. The main export sales direction is mainly "household dehumidifiers". So as long as the resistance of the potentiometer is less than or equal to 10K, it is okay. If the output voltage of the frequency converter is 0 - 10V, a 10K potentiometer should be selected. If the output voltage of the frequency converter is 0 - 5V, a 4.7K potentiometer should be selected. If the current is too large, it will cause unnecessary power loss. Current signal 4 - 20ma When the external input signal is 4 - 20ma, connect a 500 - ohm resistor in series in the circuit. Under a 10V power supply, the resistance corresponding to 20ma is 500. Check the wiring Check whether the wiring of the potentiometer pins is correct. When debugging the potentiometer, measure whether the voltage of the potentiometer pins changes.
Dry-type transformer temperature controller BWD - 3K Multifunctional power meter PD977E - 9A
High-voltage live display device DXN4B - Q Reactive power dynamic compensation regulator ED - KCS1A(30kvar)
Voltmeter YS - 96 - 250V
Surge protector NPS02 - FA50/420 Capacitor KDBC - 250/5 - 1
Overvoltage protector YCB - B - 12.7 - 3200 Ammeter PD11345I - 3K1
Backup protector ARD - SCB25/T1 Digital display ammeter XH394I - 9T1
Digital current display meter YTD1 - 1BX Circuit breaker LUGM6 - 225/100 - 3200
Miniature circuit breaker 5SY61MCBC6 Molded case circuit breaker BE1N - 125/63/3 Digital display pressure gauge SM/XMT - 226NH
Leakage circuit breaker BkZ45L - 63D/3p Intelligent control device EYCK99 - 6
Miniature leakage circuit breaker THB1LE - 63/2P Temperature controller WSK - TLD
Voltmeter CD194U - AX1 Reactor CHKSG - 34/0.411
Sensor CGZ1 - 40.5/320 Multifunctional power meter LYHD - 9C302 Leakage circuit breaker LBM1L - 225/140A/4300
Surge protector SPD - 1/12.5 - 320 Switchgear intelligent control device DN8520/HS2/X/K/DC220V/Z
Small circuit breaker DZ47 - 63 Reactor ISK50/400 - 7
Single-phase digital display ammeter CEA72 - A15/M Multifunctional power meter PMH920(72)
Motor protector PDM - 810M2×DCS2 - A+Z - TY - MT100 - 400V Hall voltage sensor HV301GB Multifunctional power meter ST521P
Contactor EW040 - C Isolation transmitter NPWD - C1 - SDF326
Cross-flow cooling fan GFD470/150 - 1050SF - 90W - 220V Overvoltage protector YH5WZ1 - 51/150*51/134J
Frequency converter MD480T22G Instrument AI2000
Frequency meter SM194F - DI1
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