1, according to the wiring diagram to connect the working line, it must be noted that the use of the test transformer must be "high voltage tail" and reliable grounding.
2. Before turning on the power, adjust the regulator of the operation box (Taiwan) to zero. After the power is turned on, the green indicator light is on, the start button is pressed, and the red indicator light is on, indicating that the transformer is powered on and waiting for boost.
3. Rotate the pressure regulator handle clockwise with a speed of 1.5-2KV/S, and pay close attention to the meter indication and the condition of the tested product. When the leakage current is too large or the test product is broken down, overcurrent protection The relay will quickly cut off the power supply.
4. After the oil-immersed test transformer is completed, adjust the pressure regulator to zero at a uniform speed.
5. If the voltmeter pointer is found to be oscillating during the test, the current meter indication value increases sharply, or the sample smokes, arcs, has a focal position, and abnormal noise, the voltage should be immediately depressurized, cut off the power source, and check the cause.
6. When the oil immersed test transformer is used for DC test, the high voltage test transformer shall loosen and loosen the silicon stack short circuit rod (D) and the series tapping terminal rod (C) in the high voltage sleeve, and wrap it with clean insulation paper. When conducting the AC voltage test after the DC test, two shorting rods must be screwed.
7. Current limiting resistors and filter capacitors should be added to the DC test to prevent damaging the silicon stack.
8, the environment; temperature is too high, the top of the casing may have a small amount of oil overflow, is a normal phenomenon. When the DC test, if the corona on the inner wall of the casing appears obvious, it is generally a phenomenon of low oil. At this time, the shorting rod should be taken out, and the qualified 25# transformer oil should be supplemented with a syringe from its hole.
9. When the test transformer is used in series, the high voltage test transformer must pay attention to the corresponding contact between the output terminals (A) and (X) of the operation box and the output terminals (a) and (x) of the first test transformer. The first test transformer The output terminals (A, X) are connected to the test transformer input terminals (a) and (x) on the second JT1. The housing of the test transformer should be connected to the input of the primary transformer, and the input terminal of the test transformer on the third JT2. (a) and (x) are connected to the top output terminals (A) and (X) of the test transformer bushing on the second JT1.
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Galvanized steel sheet is carbon steel sheet coated with zinc on two sides. the process used to do this is known as the continuous hot dip process. this process results in a layer of zinc which adheres tightly to the base steel and has a spangled, or snowflake-type, appearance. The layer of zinc acts as a sacrificial coating.
Galvanised steel is mild steel with a coating of zinc The zinc protects the steel by providing cathodic protection to the exposed steel, so should the surface be damaged the zinc will corrode in preference to the steel Galvanised steel is one of the most widely used products, used extensively in the building sector, automotive, agricultural and other areas where the steel needs to be protected from corrosion.
Hot-Dip Galvanizing or HDG is a process in which zinc bonds to steel at the molecular level to produce a four-layer corrosion-resistant finish. The first three layers are zinc-iron alloy layers that are actually harder than the base steel. The fourth or top layer is pure zinc.
Galvanized Steel Sheet, Hot Dipped Galvanized, Galvanized Sheet Coil, Gi Sheet
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