This rectifier unit is used for the scientific experiment of multiphase flow energy transfer and as the power supply for the critical heat flux density experiment of fuel assemblies. It meets the requirements of multiple tests for stable voltage, adjustable voltage and low ripple of DC power supply.
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Techicel Conditions
| Use ambient temperature | The altitude does not exceed 1000 meters, the ambient temperature is 5°C-35°C, the relative humidity of the air is less than 85% (when the relative humidity is less than 85°C), there is no conductive dust Egyptian explosive gas around, and the installation inclination is not greater than 5° in indoor places. |
| Rated AC input voltage | The main power supply is 35KV50Hz, and the control power supply is 380V 50Hz |
| Rated DC output voltage | DC 300V |
| Rated DC output current | DC 40000A |
| Voltage regulation accuracy | 1% |
| Unit power factor | 0.9 |
| Pressure regulation method | Transformer on-load voltage regulation + triac phased voltage regulation, including 27-level on-load voltage regulation, 50V-300V stepless phased voltage regulation, 0-300V. On-load voltage regulator switch specification VIII-350D/72.5, level 27, rated current 350A |
| Cooling method | transformer strong oil circulating water cooling, rectifier cabinet group water-water cooling; |
| Strong oil circulating water cooler | Model YSLC0.6-400KW, cooling capacity 400KW, oil flow rate 45m3/h, oil pump power 5.5KW, inlet oil temperature 70°C, oil-water heat exchange channel gap 14mm, external access cooling water flow rate 45m3/h, inlet water temperature 30°C, water pressure not greater than 0.5MPa, water pipe connection flange DN100. (External cooling water system is provided by the user) |
| Pure water cooler | Model LSS-250B, cooling capacity 250 KW, cooling main water flow rate 42 T/H, water temperature 5°C-40°C |
| Unit protection function | It has protection functions such as low main water pressure, main water overtemperature, circulating secondary water overtemperature, rectifier overtemperature, fuse fuse alarm, transformer oil overtemperature, heavy gas protection, DC overcurrent, etc |
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FAQ
Here, common questions are answered and clarified
Voltage fluctuation fault
● Youdaoplaceholder6 Common causes:
- The external power supply is unstable or abnormal.
- There is a wiring error during the operation of the equipment.
- Environmental factors (such as temperature changes) cause voltage fluctuations.
● Solve the problem:
- Use a reliable power supply and avoid relying on external power sources.
- Check and adjust the connection method of the equipment.
- Reserve sufficient protection circuits or use step-down circuits to limit the impact of voltage fluctuations.
Short-circuit fault
● Youdaoplaceholder6 Common causes:
- Internal circuit short circuit (such as coil damage).
- External short circuit (such as short-circuiting of power pins).
● Solve the problem:
- Inspect the internal structure of the equipment, identify and repair the short-circuit points in the internal circuits.
- Use disconnected pins or external pins for protection and isolation.
- Reserve sufficient buffer layers or cooling systems to prevent the silicon wafers from overheating and getting damaged.
Current out-of-control (IQN) fault
● Youdaoplaceholder6 Common causes:
- The external current is too large, causing the silicon wafer to bear an excessively high current.
- During the operation of the o equipment, the load was too heavy, causing the silicon wafers to be overloaded.
● Solve the problem:
- Reserve sufficient safety current to ensure that the current during equipment operation does not exceed the designed maximum value of the silicon wafer.
- Use protection circuits or step-down circuits to limit the influence of external currents.
- Reserve sufficient buffer layers to prevent excessive current from damaging the silicon wafer.
Excessively high temperature fault
● Youdaoplaceholder6 Common causes:
- High-temperature environments cause silicon wafers to expand due to heat and get damaged.
- The cooling system failed to effectively cool the silicon wafers.
● Solve the problem:
- Reserve sufficient buffer layers or cooling systems to prevent the silicon wafers from overheating and getting damaged.
- Use a heat sink or coolant (such as water) to lower the temperature of the silicon wafer.
- Regularly inspect and maintain the cooling system of the equipment.
Overload fault
● Youdaoplaceholder6 Common causes:
- During the operation of the equipment, the load was too heavy, causing the silicon wafers to bear excessive current.
- If the external load exceeds the design maximum value of the silicon wafer, it may cause damage to the silicon wafer.
● Solve the problem:
- Reserve sufficient safety load to ensure that the load during equipment operation does not exceed the design maximum value of the silicon wafer.
- Use protection circuits or step-down circuits to limit the influence of external loads.
- Reserve sufficient buffer layers to prevent the silicon wafer from being damaged due to excessive load.
Summary of Solutions for Current Anomaly (IQN) Faults
● Test with a volt-ampere meter: Measure the output voltage and current to ensure they meet the design parameters of the silicon wafer.
● Apply phase difference test: Check the phase deviation of the silicon wafer to ensure its stability in AC signals.
● Dynamic calibration equipment: Dynamically adjust the equipment or external power supply according to the actual working environment (such as temperature changes).
Through regular Testing and Diagnosis processes, faults of thyristor equipment can be identified and resolved more accurately.
Certification
It has passed the ISO9001:2015 quality management system certification. In 2005, it was awarded the titles of "National Rectifier Product Quality Assurance and Honest Business Demonstration Unit" and "National AAA Quality Brand Enterprise" by the China Marketing Association. It has been rated as a "Contract-abiding and Creditworthy Enterprise" by the Wuhan Administration for Industry and Commerce for many years.
Project Case
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Factory
The total number of employees in the unit, including the situation, number and composition ratio of technical personnel at all levels, currently has over 60 employees, including more than 18 engineering and technical personnel. Among them, there are 4 senior engineers, 10 engineers, and 4 assistant engineers and technicians.
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As a designated manufacturer of rectifiers by the former Ministry of Machinery Industry, we specialize in the production of electrolytic and electrochemical rectifiers. We have numerous production achievements and rich manufacturing experience in the electrolytic copper industry.