How does an AC power supply operate?
AC contactor is a kind of switching device that uses electromagnetic force and spring elasticity to achieve contact connection and breakage to control the load circuit on and off, suitable for frequent operation and long-distance control, and is an important component in the automatic control circuit system. With the demand of national economy and the growth of electric power industry, the demand for AC contactors continues to grow, and the competition is getting more and more intense, in order to ensure the quality of the product, the test work of AC contactors is especially important.
AC power system is the most important working power supply of the substation, the automatic switching device is an important equipment that can automatically switch the AC power supply without loss of voltage of the station when there is a fault in the AC power system.
Principle of operation:
When the attraction coil of the AC contactor is energised, the static iron core generates electromagnetic suction, the armature is suctioned, and the connecting rod connected with the armature drives the contact to act, making the normally closed contact open and the normally open contact close, both of them are linked, and the contactor is in a powered state; when the attraction coil is de-energised, the electromagnetic suction disappears, and the armature releases under the action of the spring, so that the normally closed contact closes, the normally open contact is open, and the contactor is in a de-energised state. The contactor is in a de-energised state.
AC power supply series adopts advanced high-precision linear amplification line design, can provide low noise, high stability output, adjustable phase angle function is suitable for all kinds of switchgear current impact test and debugging rectifier, sweep scanning function is applied to all kinds of power electronic products efficiency test, and can capture the maximum power point of the voltage and frequency value, in addition to this, dimming, speed controller simulation function can be on the electric lamp, In addition, the dimmer and speed controller simulation function can be used to test the dimming and speed control of electric lamps and motors, which is used to verify the condition of the products when the end-users use the dimmer or speed controller, and determine whether there are any safety hazards; the interference simulation function of the input power supply can simulate the power supply transient breaks, surges, traps, specific phase angle turn on or off, and the AC sinusoidal waveform amplitude and frequency of the slow rise and slow fall characteristics. The products have been widely used in electronic motor industry, lighting, aviation, military, as well as R & D quality inspection units and factory production line testing and other fields.
