Summary

Hkkic6 series intelligent capacitors are mainly composed of two (△type) or one (Y type) low-voltage power capacitors. The latest technological achievements, such as microelectronic software and hardware technology, micro sensor technology, micro network technology and electrical appliance manufacturing technology, are adopted to make it intelligent, miniaturized and modular. It is a major breakthrough in low-voltage power automatic reactive power compensation technology. It can be flexibly used in various occasions of low-voltage reactive power compensation. It has many advantages such as simple structure, simple production, low cost, improved perfo rmance and easy maintenance.

Product features

1. Realize the perfect combination of measurement and control technology and synchronous switch, control the motion speed of switching switch, eliminate the bounce, improve the life, track and correct the closing phase Angle, and realize the switching life of millions of times. Compared with the existing similar intelligent power capacitors, it has many advantages such as high reliability, low fault, low power consumption and long life.

2. Closing without inrush current, it can realize zero-crossing input of capacitor voltage and zero-crossing excision of current, and synchronous switching can completely avoid over-voltage of switch, no over-voltage breakdown, no arc tension and reignition.

3. Compensation in the most appropriate way, complete control functions, with high-end power analyzer functions, complete functions, good performance, but also can be configured with a variety of peripherals to meet different customer needs. The measurement and protection function of the product is complete, with special protection of temperature inside the control room, harmonic content of the power grid, broken phase, three-phase unbalance, etc.

4. The product can be used by multiple building blocks, and the host machine will be automatically generated when used, while the rest are slave machines, constituting the reactive automatic control system. The automatic exit of individual failures from the machine will not affect the work of other machines. Automatic exit of host failure, new host, the composition of new system work, high degree of intelligence. The monomer capacitor displays the product working condition and the electrical circuit condition, the man-machine dialogue is simple and intuitive.

Types of meaning

Operating principle of machine

1. Quick circuit breaker, main power access end, main switch, voltage quick cut protection

2. Intelligent measurement and control

Voltage sa mpling for distribution voltage measurement and power factor measurement, as well as protection sampling for overvoltage, undervoltage and loss voltage Zero switching switch assembly, capacitor discharge switch and capacitor over voltage, under voltage, loss voltage, short circuit, over current, off phase, over harmonic, over temperature protection outlet

3. Current sampling

Temperature sensor is built in the control room for capacitor overtemperature protection Shunt ca pacitor, for reactive compensation

4. Display device, man-machine dialogue

RS485 online plug-in, mutual online and peripheral controller, constitute the system operator distribution current input

Operation principle of each component

1. MCU intelligent measurement and control part

All electronic components in the intelligent measurement and control module adopt wide temperature type and industrial grade, which can adapt to the harsh environment with large temperature change and serious electromagnetic interference, and can work reliably without interruption for a long time, with high intelligence degree and stable control performance.

2. Zero-crossing switch synchronization technology based on mechanical contact

The company summarizes the characteristics and disadvantages of mechanical contactless thyristors, contactless thyristors and composite switches. Combined with years of development and practical operation experience, the company independently develops a new generation and USES microelectronic software and hardware technology to effectively control mechanical electromagnetic relay contacts. The synchronous switch technology of low voltage power capacitor based on mechanical contact is realized. When the ac current at the two ends of the contact is zero, it is closed; when the contact is closed, it is disconnected when the AC voltage at the two ends is zero. Avoid the impact of the inrush current on the system voltage when the capacitor is put in. Reduce equipment loss and increase capacitor service life.

3. Low voltage power capacitors

The low-voltage power capacitor in the product adopts self-healing low-voltage shunt compensation capacitor, and progressive thickening zinc aluminum metallized polypropylene film is used as dielectric, with high stability and reliability. Among capacitors of the same brand, the larger a single capacitor is, the longer and thicker its core components are. The length of the element leads to the increase of resistance loss, the thickness of the element is large, the conductive layer area of the end surface is large, and the temperature difference between the inside and outside of the element increases, which makes the conductive layer more likely to be separated from the plate. Therefore, the use of single-closed large- capacity capacitor is not as reliable as the use of small-capacity capacitor in parallel, and the switching series of the capacitor can be effectively increased. At the same time, the temperature sensor is built in the capacitor to reflect the internal heating degree of the capacitor in the case of over-voltage, over-harmonic, leakage flow and high ambient temperature, so as to realize over-temperature protection.

Application in complete cabinets

Maximum compensation capacity: 800kVAR; Number of installed machines:≤20

Maximum compensation capacity of 800mm wide reactive power compensation cabinet: 600kVAR; Number of installed machines:≤16

Product terminal

Appearance and installation dimensions

Note: The width and depth of intelligent capacitors are consistent with different capacities, only the height is different

Technical specifications of the product

1.Power supply conditions

Rated voltage ~ 220V / 380V Voltage deviation ±20%

Voltage waveform harmonics shall not be greater than 5%

Voltage waveform: sine wave, the total distortion rate is not more than 5%

Frequency: 48.5~51.5Hz Power consumption: <1W(when  removing the capacitor) <1W(when putting two capacitors)

2. Measurement and error

Voltage: 0.5% or less

Current: 1% or lessPower

factor :≤±1.5%

Temperature: +/- 1 °C

3. Protection error

Voltage: 0.5% or less

Current: 1% or less

Temperature: +/ -1 °C

4. Environmental conditions

Ambient temperature: -40~40°C

Relative humidity: 40°C，20-90%

Altitude:≤2000m

5. Reliability parameters

Control accuracy :100%

Control tolerance :1 million times

6. Electrical safety

The electrical clearance and crawl distance, insulation strength, safety protection, short-circuit strength, adoption and control circuit protection all meet the requirements of the corresponding clauses in the standard of the power industry of the People' S Republic of China DL/T842-2003 "Operating Conditions of Low-Voltage Shunt Capacitor Devices" and GB/T22582-2008 "Low-Voltage Power Ca pacitor Power Factor Compensation Devices" .

Product design application scheme

1. Electrical symbols of products

According to GB5465.1, GB5465.2 and GB715, the graphic symbol of HKKIC6 series intelligent capacitors is determined as shown in the picture on the right, and the character symbol is "S" and"Y

2. Reference legend of centralized compensation mode design

Online attachment
RS-485 online plug

Product external controller diagram

1. Electric schematic diagram of three phase mixed complement (total complement + partial complement)

2. Three-phase common complement electrical schematic diagram