High Strength Steel Tie Rod are steel structural members made of carbon structural steel and alloy steel, processed by machining, heat treatment and surface anti-corrosion treatment, supplemented by adjusting sleeves, lock and joints etc. The Steel Tie Rod are important components of steel structures for construction of giant, large span buildings and ship docks. They are mainly used for prestressed parts and large span buildings in construction projects. While the strength of the product is improved, but the plasticity index is not reduced, which satisfies the principle of using the same amount of strength in the architectural design. The tie rods, tie bars, tension rods and tension bars steel grades are specified as , grade 785, grade 830, grade 930, grade 1080 etc. Post Tension Bar,Tie Bar Construction,Post Tension Rods,Post Tension Bar For Bridge SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.lerenspecialsteel.com
The automatic transformer characteristic comprehensive tester adopts a high-efficiency, low-cost and high-quality material and a special bypass booster. The microprocessor performs data acquisition, analysis and storage. The built-in micro printer can print test data and curves, and when the CT ratio is measured. , can automatically calculate the transformation ratio value. One person can complete all the testing work. This machine is lightweight, portable, and easy to operate. Its unique performance is currently a rare instrument. Is designed for relay protection professional test current transformer volt-ampere characteristics, ratio test and polarity discrimination design, but also for transformer polarity discrimination test, is a performance-price ratio, relatively high multi-functional test equipment.
Automatic transformer characteristic comprehensive tester use method:
Method of use Volt-ampere characteristic test 1. The user selects the input voltage appropriately according to the volt-ampere characteristic of the equipment to be tested. When the voltage above 500V is required to be output, the voltage of 380V should be input.
2. Ground the instrument reliably.
3. Check that the current transformer has no grounding point.
4. Turn switch “16†to volt.
5. The instrument output and voltage measurement are connected to the secondary side of the current transformer (as shown in Figure 2).
6. Check if the regulator is zeroed. Open the “24†switch and press the reset button. The indicator above it is on, and the microprocessor is waiting for storage.
7. Turn on the output switch 4 and slowly turn the pressure regulator clockwise. Press the memory button when it needs to be stored. The indicator above the memory button is on and the internal buzzer sounds. (Note: It is not allowed to recall the regulator during the whole process of measurement. The retention time when adjusting to high current should be as short as possible.)
8. Up to 20 sets of current and voltage values ​​can be stored.
9. After the storage is completed, the regulator is zeroed.
Ratio test 1. Turn switch “16†to gear ratio.
2. When the input AC 220V, 0-400A output; when the input AC 380V, 0-600A output.
3. Turn the knob "5" to zero, turn on the switch "24", switch "4" open, slowly turn the knob "5", so that the header "7" shows a current value of IO (A) at the same time 6" has a corresponding current value Ii (mA). After the display is stable, press the "10" key to store the data. Turn the knob "5" to zero and the "11" key to print the ratio data and calculation results. Turn off switch "4".
4. After the test is completed, disconnect the power supply. Pull out the cable.
5. When the test current is less than the primary current, the external current transformer can be connected with the external sensor through the power cable of the current booster and then connected to the 25 external jack. The secondary connection is still connected to the secondary jack. Do not open 4 regulator switch when doing the test.
Automatic transformer characteristic integrated tester built-in structure: