What is the pump's full performance test bench? A: The equipment capable of accurately testing the full performance parameters of a pump with precision instruments is the full-performance test bench. National standards for the B-level accuracy. The flow rate is measured with a precision worm gear flowmeter and the head is measured with a precision pressure gauge. Suction with a precision vacuum gauge measurement. Power measured with a precision shaft power machine. Speed ​​with tachometer. Efficiency according to the measured value: n = rQ102 calculation. Pump high-voltage motor frequency control transformation should pay attention to the problem With the continuous improvement of industrial automation and power electronics technology, water projects using high-voltage frequency control technology more and more, Guangxi Branch intends to take in the pumping station 12-pulse voltage source high-voltage inverter to control the power of the pump motor 355KW, pump motor frequency control technology upgrade, in order to achieve the purpose of electrical energy saving and process optimization, high-voltage inverter in the engineering design should pay attention to: a Motor characteristics test and re-revision of technical specifications When an ordinary motor is supplied with power by frequency conversion, the voltage and current harmonic components at the output of the inverter increase the motor loss, reduce efficiency and increase the temperature. The increase in losses caused by higher harmonics is mainly manifested in the increase of copper loss, iron loss and additional loss of the stator and the rotor. Among them, the rotor copper consumption is the most significant, because the induction motor is always in the state of slip near 1 rotation, so the rotor copper loss is very large. In ordinary induction motors, the skin effect of the rotor increases the actual impedance to improve the starting performance of the motor, thereby increasing the copper consumption. On the other hand, due to the distributed capacitance between the motor coils, the voltage between the coils is not uniform when the harmonic voltage is input. This long-term repetitive effect causes damage to the insulation of a portion of the stator coil, resulting in The coil is aging, which is unacceptable in the insulation structure of a conventional induction motor. In addition, the electromagnetic circuit of the motor can not be absolutely symmetrical, so all the harmonic components contained in the output power of the inverter will interact with the space harmonic components inherent in the electromagnetic circuit to form various electromagnetic pulsations. At the same time, the motor is in the working condition that the frequency is constantly adjusted, it is easy to produce mechanical resonance with the mechanical part of the motor, resulting in damage to the mechanical parts of the motor. Therefore, in the frequency control project, in order to avoid the above problems in the operation of the variable frequency speed regulation system, the technical design must take into consideration the technical cooperation with the motor manufacturer, carry out the speed experiment on the relevant characteristics of the motor and re-amend the original motor Technical specifications. Second, the main points of power cable selection and laying requirements Because the connection between the output of the inverter and the motor by cable attachment, and the circuit has the capacitance of each phase, so the capacitance of the circuit current is not equal. If the cable is attached with a long distance and there is a higher harmonic current in the line, the arc extinguished by the fault capacitor current will be extinguished for a long time if single-phase grounding occurs, which will cause the cable to generate heat and cause non-fault insulation. Therefore, in the frequency control project, for the output power cable, consider the three-phase symmetry and shielding of the cable structure, the appropriate increase in cable cross-section, laying length does not exceed the limit (100m), if the original output power cable is unshielded Or cross-section flow of less than 2, should be replaced to meet the requirements of the power cable. The laying of the site construction of the power cables and control cables and signal cables laid separately to avoid the power cables from the high harmonics of the magnetic field to interfere with other signals. Third, the basic requirements of the working environment of the inverter As the inverter part of the high-voltage inverter using high-voltage IGBT and other power devices, the opening and closing frequency greater than 100HZ, easy to form high-order harmonic current, making the frequency conversion device will produce a certain amount of work Heat. The top of the inverter cabinet is generally equipped with exhaust fan, which will discharge the heat inside the cabinet, which makes the indoor temperature continues to rise, and ultimately will affect the reliable operation of the various components inside the cabinet. Therefore, in the water works engineering general frequency control device is set separately in the frequency control room, indoor must be equipped with spare air-conditioning facilities, control the indoor temperature in the inverter required range, at the same time with ventilation doors and windows, if necessary Dedicated duct for forced ventilation and cooling. Fourth, the high-voltage power supply system, the outlet breaker control technology improvements High-voltage side of the transformer used in high-voltage system of the transformer to connect directly with the switchgear, but the protection of the switchgear is only the supply line and the transformer low-voltage side of the short circuit, and variable frequency The fault of the inverter should be completed by the inverter's own detection and protection system. When the inverter fails to issue a trip signal, the circuit breaker should trip reliably. However, there is a situation where the tripping circuit disconnection or DC control power disappears inside the ordinary circuit breaker high-voltage switchgear. When the inverter happens to be faulty (the circuit breaker is required to be tripped), the tripping coil has lost power and the circuit breaker refuses to act, thus causing the inverter Internal power device is damaged. Therefore, in the design, the circuit breaker with undervoltage tripping coil is selected. Once the tripping circuit disconnects or the control power disappears, the circuit breaker will firstly automatically trip to protect the safety of the inverter.
Led Fish Tank Lights With Remote
Led Fish Tank Lights With Remote ADVANTAGE
1. Light using CREE LED chips.
2. Unique technology of Standard module design.
3. Brand new idea,all-round LED optic lens.
4. Increases 15% of the growth.
5. Air-circulation system designed to improve The plants' photosynthesis and growth.
6. Easy Disassembling and Reassembling .
7. Exclusive Design:Checking and indicating defects Automatically.
8. Grow your corals under LEDs
9. Enhance the colors on your fish
Our Led Fish Tank Lights With Remote is popular in led market,cause its elegant outlook and its high quality and competitive price.
Item Display
Key Features
1.The lifespan is over 50000 hours,low maintenance costs.
2.Energy conservation,saving over 80% energy than the traditional HPS.
3.High light efficiency,90% of the light will be absorbed by the aquatic plants,while just 8%-10% to the HPS.
4.Build-in cooling system,could solve the heat dissipation excellently.
5.Built-in power supply, CE approved, No setup required, just simpler and safer plugs directly into AC85V-264V, no reflector & ballast needed.
Convenient in using lights at the same time.
Package Include
1 X LED Aquarium Light
1 X Free Hanging Kit
1X Free Power Cord
Quality Control systems and after-sales
All the lamps have passed strict quality examination and are packed carefully before shipping.In order that our customers get high quality lamps,we attach importance to every details.
Application
1. coral reef lighting,fish tank lighting,coral reef tank lighting
2. aquarium lighting,aquarium art,aquarium shop,aquarim centre
3. fish bowl lighting,fish lighting,freshwater lighting,saltwater lighting
Our Company
Philizon enjoys a high reputation in grow led lamp and led Aquarium Light fields throughout Europe and America,Philizon also insists on taking high technology to design the newest&best led Grow Light and aquarium light constantly as the market request. Our R&D team with more than 10 people has rich experience in appearance design, electronic structure,heat dissipation simulation analysis,optical lens design,light control system etc.Most of our hydroponics full spectrum led grow lighting and Led Fish Tank Lights With Remote are private modules,we have 10 more design patent and utility model patent till now.
Trade Terms
Payment: T/T, L/C, Paypal, 30% deposits before production, 70% balance to be paid before deliverying(Western Union are welcome)
Sample will be delivered within 7 working days.
Discounts are offered based on order quanlityes.
MOQ:sample order are acceptable
Delivery ways:DHL,UPS,FedEx,TNT, door to door,by sea,by air,etc.
Our products ranges:
LED plant grow lights for agricultural lighting;
LED aquarium lights for fish tanks,corals,saltwater tank,marine tank with reef,coral,sps,lps,fish,etc;
Warmly welcome to take a visit on our factory at any time and we will pick you up at the airport in Shenzhen.
Dimmable Led Aquarium Light,Dimmable Aquarium Light,Coral Reef Led Aquarium Light,Dimmable Aquarium Light Led
Shenzhen Phlizon Technology Co.,Ltd. , https://www.szledaquariumlighting.com