In the fields of electric power, industry and mechanical equipment, industrial automation and motor control technology are becoming more and more widely used.
Detecting information such as phase sequence and motor rotation direction is essential to ensure the normal operation of equipment, improve production efficiency, and reduce failure rates.
Three-phase electricity, a powerful engine for industry and commerce
The power system is the core infrastructure for the functioning of modern society. Generally, single-phase electricity is mainly used to power residential and office appliances, while three-phase AC systems are widely used in power distribution systems, as well as directly supplying power to high-power equipment.
Three-phase electricity is an alternating current system consisting of three phases. These three phases are often referred to as phases A, B, and C, and each phase has its own voltage and current waveform, and the phase difference between them is 120 degrees.
The principle of three-phase electricity is mainly based on:Interaction of electromagnetic induction and rotating magnetic fields
First of all,The principle of electromagnetic induction is the foundation。When a conductor moves in a magnetic field or the magnetic field changes, an electromotive force is generated in the conductor, which in turn generates an electric current. In three-phase electricity, each phase corresponds to a separate wire or coil, and when an electric current is passed through the wire, they create a magnetic field.
Secondly,The rotating magnetic field is the key to three-phase electricity。By introducing the current of three phases into three separate coils or windings, the magnetic field generated by each winding has a phase difference of 120 degrees. When these three magnetic fields are present at the same time, they interact with each other to form a rotating magnetic field. The speed and direction of this rotating magnetic field is determined by the frequency and phase relationship of the three phases.
Three-phase phase sequence is related to the operation safety of the power system
In all areas where motors, drives, and electrical systems with three-phase power supply provide electrical energy, the phase sequence of ABC three-phase is important. Generally speaking, yellow, green, red correspond to A, B, C three phases, the three phases of the generator can never be connected wrong, the correlation and connection of different phase sequences, directly determine the magnetic field compliance and rotation direction of the motor.
For example, when using a three-phase AC motor, it is necessary to know the phase sequence of the connected three-phase power supply, if the phase sequence is incorrect, the direction of rotation of the motor will be opposite to the desired direction, which may lead to equipment failure or even safety accidents.
In electrical systems, detecting the phase sequence, rotating magnetic field, and motor steering of a three-phase system can provide engineers with important information about the motor's operating status, load conditions, and electrical faults to avoid production interruptions or equipment damage due to incorrect operation.
The all-in-one design efficiently measures phase and steering
Huashengchang DT-902 motor and phase sequence rotation indicator, is specially used to measure the rotary magnetic field and motor steering instrument of three-phase system, can be used:Determine the direction of the rotating magnetic field, test lines, test motor line connections and indicate the direction of motor rotation
As a portable handheld motor and phase sequence rotation indicator, the DT-902 has excellent high voltage tolerance. Worksat 1V 400Vand2~400hzThe wide measurement range allows the DT-902 to be compatible with a wide range of electrical equipment in the three-phase electrical industry, and efficiently complete the phase sequence detection task.
The operation interface is simple and easy to use, which can clearly indicate the 3 phase lines and the direction of rotation of the phase sequence, and the phase loss and inversion state can be intuitively displayed without any button operation after the connection, and the average response speed of the test is as low as 1s. There is also a corresponding indication** on the back of the instrument for easy viewing.
The DT-902 accurately measures magnetic fields, and the non-contact motor steering indication does not require a wiring connection, and the instrument can be measured within one foot of the motor.
There is no need for batteries or external power supply, and the measurement object is directly powered, which greatly saves the cost and working time, and there is no need to worry about power supply during long-term inspection.
Safety is another highlight of the DT-902, which is electrically safe in accordance with the international standards DIN VDE 0411, IEC 61010 DIN, VDE 0413-7, IEC 61557-7 EN 61557-7. The dual injection molded housing design further ensures the safety of engineers and instruments during use.
DT-902 has a wide range of applications, and can be widely used in phase sequence detection of three-phase power equipment in electric power, communications, meteorology, railways, oil fields, construction, measurement, scientific research and teaching, and industrial and mining enterprises.
Huashengchang brand always adheres to scientific and technological innovation as the driving force, and is committed to providing users with high-quality products and services.
In the future, Huashengchang will continue to uphold the concept of "innovation, professionalism and quality", constantly pursue excellent quality and innovative technology, and provide users with more intelligent and efficient power equipment and solutions.