Q:Various types of contactors are classified

This non-contact power electronic switch circuit does not produce arc, which avoids the traditional contactor arc on the contact material of electrical wear, it greatly increases the contact life and reliability

Q:Why should the thermal relay be used with the AC contactor

When the push button SB2 is pressed, the AC contactor coil KM is energized and its main contact is closed, so that the motor is started and the auxiliary contact is closed from the self-locking action.

Q:Contactor frequent pull is how the matter

Coil voltage is too low, need to check the control coil power is normal.

Q:What types of contactors can be divided into?

magnet combined with the combination of operating mechanism, not just the use of the original electromagnetic Suction and spring reaction as the core of the pull and separation of powe

Q:What are the principles of selection of contactors?

Select the rated voltage of the main contact of the contactor The rated voltage of the main contact of the contactor shall be greater than or equal to the rated voltage of the control circuit.

Q:Computer-centric development trend

Compared with the traditional oscilloscope detection, the contact arc arc voltage waveform is accurate

Q:Application of Virtual Instrument Technology in Parameter Detection of Switchgear

Compared with the traditional compilation, VB, VC and other text programming language, LabDes software program is very simple to write. In the Lab VIEW environment to install the data acquisition card driver

Q:How to get the relay time parameter

The literature refers to a relay time parameter computer detection method, which uses self-developed acquisition board, which is mainly composed of single-chip and its peripheral circuit

Q:What is the main component of the contactor?

The power of the AC contactor is derived from the magnetic field generated by the AC core coil. The solenoid core is made of two "mountain" shaped silicon steel sheets

Q:What is the contactor's formula?

The rated current and rated voltage of the low voltage circuit breaker shall not be less than the normal operating voltage of the line and the calculated load current (the total current at all load operation, multiplied by the actual situation)