(1) Select the type of the energy meter according to the task. When single-phase power is used, single-phase electric energy meter is used; when three-phase power is used, three-phase four-wire electric energy meter or three single-phase electric energy meters are selected; except for complete power distribution equipment, three-phase three-wire electric energy meter is generally not used.
(2) Select the model of the energy meter according to the maximum current and rated voltage of the load and the accuracy of the required measured value. The rated voltage of the energy meter should be consistent with the rated voltage of the load; and the rated current of the energy meter should be greater than or equal to the maximum current of the load.
(3) When there is no load, the aluminum turntable of the electric energy meter should be stationary. When there is no current in the current line of the electric energy meter and there is a rated voltage on the voltage line, the rotation of the aluminum disc should not exceed the allowable value of the creep.
The ball diameter ranges from 0.4mm to 250mm, and the ball diameter tolerance can reach +/-0.001mm, and the product consistency is good. It is widely used for coupling between optical fiber and semiconductor laser, or another optical fiber, or photodetector.
Processing materials mainly include optical glass, quartz, float glass, high borosilicate glass, laser crystal, sapphire, ruby, germanium glass, germanium single crystal, zinc selenide, single crystal silicon, K9 crystal glass, calcium fluoride, silicic acid Salt glass, zinc selenide and cyanide infrared glass lens.
Among them, H-K9L (N-BK7) is crystal clear and has excellent transmittance from visible to near infrared (350-2000nm). It is the most commonly used optical glass for preparing high-quality optical components. When the extra advantage of UV fused silica is not required ( When it has good transmittance and low thermal expansion coefficient in the ultraviolet band), H-K9L is generally selected for optical coating and other fields.
K9 (BK7) has excellent mechanical properties and very low bubbles and impurities, and has good scratch resistance. Due to its stable chemical properties, special grinding and polishing are not required. It is used in many fields such as optoelectronics, microwave technology, diffractive optical element and so on.
H-K9L Half Ball Lens,N-Bk7 Half Ball Lens,H-K9L Optical Half Ball Lens,Hemispherical Lens
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