1. Basic situation Siemens Automation and Drives Group is a leading global supplier of industrial automation. The group's product line covers the manufacturing, process and electrical installation industries, as well as system solutions. Siemens provides a full range of inverter products with different needs, from standard drive series to high-performance engineering inverters, with power ranges from 0.12KW to 10MW. . Due to the strong competitiveness of its products, it has a large market share in the textile, petroleum, metallurgical and other industries, and has an absolute advantage in the rolling mill and lifting fields.
Siemens inverters are mainly divided into three types: general-purpose, engineering and special-purpose. The reasons for the rapid growth of Siemens universal inverters are mainly the following:
(1) Continuously launch new products to meet the specific requirements of different users. The general update cycle of Siemens products does not exceed 5 years. Its products can meet the special requirements of different users.
(2) Powerful communication functions and comprehensive supporting software are a major feature of Siemens automation products. This is particularly evident in the rapid development of China's papermaking, chemical, steel, machinery manufacturing and other industries in the rapid development of technological transformation to automation control.
(3) The new-generation MM4 inverter introduced in the past two years not only has the good structure of Siemens engineering inverter MasterDrive, but also has a high performance-price ratio. Although the price is not high, it has more powerful functions than similar products. BiCo function can be used to program more complex functions. It can be used for input (digital, analog, serial communication, etc.) and output (current, frequency, analog output, relay node output, etc.) Establish Boolean algebra and mathematical relationships.
(4) Another significant feature of the new-generation MM4 inverter that is different from other inverters is that it provides users with a completely open programming platform so that users can make maximum use of limited resources to achieve maximum performance according to their needs. Possibly complex control characteristics. Its dozens of free function blocks can replace PLC to achieve some simple programming operations.
Second, the characteristics of frequency conversion control cabinet
1. Adopt inverters from well-known brands at home and abroad. Nanjing Kangzhuo Environmental Technology Co., Ltd. mainly uses inverters from famous companies such as ABB, Siemens, Schneider, Orui etc. as the core components of our inverter control cabinet. 2. Manufacture Kangzhuo's own inverter control cabinet.
2. Well-designed Our frequency conversion control cabinets are designed, selected, and produced in complete sets. Each link is strictly in accordance with the national 3C quality certification and strict control. The design, procurement, production, inspection, and delivery are of high quality and strict requirements. Every process of the company is subject to strict quality management and tracking. Before designing, our design engineers according to the requirements of the customer, the site environment (temperature, humidity, electromagnetic radiation level, explosion-proof level, etc.); the specific parameters of the motor such as origin, rated current, rated voltage, number of phases, motor load type, Working system; motor starting method; the number of frequency converter cabinets to drive the motor, control cabinet control methods, such as manual / automatic, local / remote; power quality requirements for power supply applications, lightning protection, surge, electromagnetic radiation, in-depth understanding of the drive The mechanical characteristics of the machine, and then comprehensively consider which brand of inverter of that series is used as the core device of the electric drag. After comprehensive consideration, design the electrical schematic diagram. In the design, do some suppression measures for possible interference, For example, installing reactors for incoming and outgoing lines, isolating transformers, using shielded cables for sensors, and grounding the inverters separately, partly install lightning protection, surge protection measures, and other protective measures according to the installation location of the control cabinet.
After the design of the electrical control principle is completed, we will carry out targeted electrical process design, including electrical wiring, layout of component installation positions, and sheet metal design of the electrical cabinet. Consider whether to install according to the temperature and humidity of the environment Cooling fan, corresponding dehumidifier. Also, whether there is explosive gas, and other comprehensive selection of cabinet material, protection level and so on.
3. Excellent assembly In the process equipment, strictly follow the design and the country's corresponding wiring installation specifications. Strive to achieve beautiful and generous wiring, clear layers, firm and reliable wiring, and good contact. The markings are complete, clear and firm. The panel is neat and the components are arranged evenly and beautifully.
4. Strict inspection During the inspection, strict standards are adopted, and the design and inspection processes are strictly followed. Once problems are found, they are tracked down until the problem is found, and sufficient tests are performed during the inspection to ensure zero errors.
5, affordable. Thoughtful and timely after-sales service and timely delivery.
3. The main components of the frequency conversion control cabinet are selected. Our company's frequency conversion control cabinet is selected from manufacturers with good brand reputation and quality at home and abroad. For example, the contactor is mainly selected from Chint and Schneider. The circuit breaker is mainly selected from Schneider and Chint. The buttons are also selected from Schneider and Chint, and the intermediate relays are also selected from Chint, Schneider, Omron and other outstanding quality brands. At the same time, for the pumps, we also use the self-developed Kangzhu brand comprehensive protection, which has been independently proven by our company and has proven quality and reliability. The converter and pump controller work with the frequency converter. PLC uses Siemens brand. Good design and reliable components are an important guarantee to ensure the quality of our control cabinet. We generally have the function of switching between power frequency and frequency conversion. When there is a problem with the inverter, it can be switched to power frequency operation, which improves the flexibility of accident response. The autotransformer uses Zhengtai products and chooses different configurations according to different customer requirements. If customers pay attention to quality and stability, there is a slight margin for engineering cost. Our components are generally Schneider, and the inverter is ABB, Schneider or Siemens. ; If the customer pursues cost-effectiveness, we will configure Chint and Orient inverters to balance the performance and price relationship for the customer.
Fourth, Nanjing Kang Zhuo frequency conversion control cabinet is suitable for occasions Our frequency conversion control cabinet is mainly for fans and pumps, mainly using PLC technology, PID algorithm, intelligent adjustment of the operating frequency of the inverter to meet the needs of actual production.
Main application areas:
1. Widely used in urban and rural water supply systems.
2. Closed-loop constant-pressure water supply for high-rise buildings, domestic and firefighting water, and industrial water.
3. Automatic control of boiler make-up water pump and thermal heating circulation pump.
4. Farmland irrigation and fountain control.
5, air-conditioning control and cold water circulation control.
6. Flow control and secondary pressure control in water plants, pumping stations, and petrochemical industries.
7. Various energy-saving transformations and various production lines with high requirements on speed regulation performance.
8. Various occasions requiring constant pressure gas supply.
Fifth, the installation and commissioning of Nanjing Kangzhuo inverter control cabinet :
1. First confirm that there is no explosive, corrosive gas or dust in the installation place of the frequency conversion control cabinet;
2. Confirm that there is no severe vibration at the installation place of the frequency conversion control cabinet. Reserve a maintenance channel during installation;
3. Confirm that the ambient temperature is between -5 ¡ã C and 40 ¡ã C, the relative humidity does not exceed 90% at normal temperature, and there is no condensation; if the ambient temperature and humidity exceed this requirement, a specially designed inverter control cabinet is required.
4. The power supply fluctuates between -10%-+ 10.
5. The altitude does not exceed 1000 meters.
Preparation before commissioning: confirm whether the control cabinet installation is in place; confirm whether the wiring inside the cabinet is loose or disconnected; confirm again whether the wiring of the inverter is incorrect, whether the DC and AC wiring are incorrect; whether the main power wiring is correct; whether the motor wiring is correct Correct; whether the cable model matches the selected motor (load); whether the rated power of the inverter is greater than or equal to the rated power of the selected motor; if it is a heavy load, the rated power of the inverter is greater than the motor power by one or two Grade; whether the setting value of the thermal relay is correct. Are there any extra wires or foreign objects in the cabinet? Close the main power circuit breaker and test once, and quickly disconnect it to see if the wiring is correct and the phase sequence is correct.
Debugging: There are no problems in the above links. According to the control requirements of the on-site process, set the parameters strictly in accordance with the instruction manual of the inverter. After setting, confirm whether the motor rated power, rated voltage, rated current and other parameters are correct, the protection parameters are set correctly, and the control method meets the process control requirements. After confirming that there is no error, start the test run, and judge whether it needs to be modified based on the signal on site Set the parameter value. For closed-loop control, especially constant pressure control, first adjust the P parameter when setting the PID. Generally, it is slowly adjusted from small to large. If the P parameter is set large, the system's adjustment speed is fast and it is easy to cause system oscillation and integration. The parameter can not be set too short. If the integration time is too short, the integral regulator will be too strong and repeated overshoot will occur, making the system unstable until oscillation occurs. The integration time is generally adjusted from large to small, gradually adjusting the integration time, and observing the adjustment effect of the system until the stable speed of the system reaches the requirements.
Sixth, maintenance and repair products one month from the time of sale, three months of replacement free warranty within one year, life-long maintenance services in the process of using technical assistance, the company has established a professional customer service marketing services, free of charge to provide pre-sales users Technical consultation, installation and commissioning guidance during, during and after sales, to solve the problems raised by users .
24- hour service hotline: 400-0940-400
* Ordering Information: Please specify model, quantity, and whether there are special needs.