When the inverter is used to form an automatic control system for control, in many cases, the PLC and the inverter are used together, and how to correctly connect the PLC and the inverter together has become the key to the success of the system. 1.PLC switch ...

1. Low-voltage electrical appliances should be equipped in a place without violent vibration, and should have an appropriate height from the ground. It is necessary to connect the power cord such as the knife switch and the load switch to the fixed contact, and it is forbidden to hang the power cord on the knife switch. 2. Low-voltage ...

Most of the motors used in the industry are of this type. The rotational speed of an induction AC motor (henceforth referred to as a motor) is approximately determined by the number of poles and frequency of the motor. The number of poles of the motor is fixed by the working principle of the motor. Since the pole ...

1) Survey and research method. The investigation and research method is to understand the obvious problem phenomena through "seeing", "listening", "smelling", "touching" and "asking"; After visiting the operator, understand the cause of the failure; A common way to help find the fault point after asking others or consulting information ...

Although the "measurement and control skills and instruments" category of majors touch the fields of national defense, aerospace, aviation, sailing, railway, machinery, light industry, chemical industry, electronics, electric power, telecommunications, metallurgy, petroleum, mining, geology, surveying and other industrial, agricultural and scientific research categories, the Ministry of Education has a special understanding of "measurement and control skills and instruments".

With the development of the electric power industry, now the electricity has been accompanied by every detail of our days, so the maintenance of the electric power industry, began to get more and more attention from everyone, because the circuit in the daily operation side, very simple because of overvoltage or undervoltage and present a certain problem, which ...

What problems should be paid attention to when the motor works beyond 60Hz? The following precautions should be taken when operating beyond 60Hz (1) Machinery and equipment should have sufficient potential to work at this speed (mechanical strength, noise, vibration, etc.). (2) ...

1. Check whether all switches are in the disconnected position; 2. Check whether there are foreign objects in the UPS uninterruptible power supply cabinet and transformer; Check whether the flat cable connection is correct and whether it is loose; 3. Check that the connected plug is ...

1. LMC058 & LMC078 Modicon Motion Controller Product Information Faster machine planning The motion controller uses the same programming software as the PLC; Custom-made utility blocks for complex use; Dedicated motion function library for programming, debugging, and diagnosis ...

1. According to the requirements of measurement intention: It is required to select the unit with instantaneous flow rate or cumulative flow rate (cumulative flow), the unit of flow display, measurement accuracy, repeatability, linearity, flow scale and scale, measurement temperature, pressure loss, temperature and pressure compensation, output signal characteristics and echoes.

Protective functions can be divided into the following two categories: (1) After detecting the abnormal situation, the correction action is automatically carried out, such as overcurrent loss speed avoidance, regeneration overvoltage stall avoidance. (2) After detecting the abnormality, the PWM control signal of the power semiconductor equipment is closed, so that the motor automatically stops. As...

P0.0——P0. 7 : Port P0 is an 8-bit open-drain bidirectional I/O port. When visiting off-chip memory, it is time-shared for a low-8-bit address and an 8-bit bidirectional data bus. When EPROM is programmed, the instruction byte is input by P0, and when the program is verified, it outputs ...

There are many series of contactors: LC1-SK series: below 6ALC1-K series: 6A-16ALC1-D series: 9A-150ALC1-F series: 115A-800ALC1-B series: 750A-1800A When installing, it should be in accordance with the regulations...

1. Different safety standards UPS is mainly used to protect users' equipment or business from economic loss, and its product technical certification mainly includes Thiel certification, CQC certification, etc. The development of EPS power supply stems from the sudden failure of the power grid, in order to ensure the power safety and fire linkage needs, it can be supplied immediately.

Problem: After the UPS is turned on, there is no display on the panel, and the UPS does not work Problem analysis: Judging from the problem phenomenon, the problem lies in the mains input, the battery and the mains detection part and the battery voltage detection loop: 1. Check ...

1 Contingency plan Contingency plans are the top priority of preventive protection. Arrangements need to be better partnered with service providers to be part of the corporate programme. This means implementing processes and procedures for every type of thing, including contingency plans. ...

In order to ensure that the APCUPS power supply can continue to provide high-quality power to the computer in the event of a power outage, it is particularly important to equip the battery backup battery. When the frequency load does not agree to be supplied with power, the backup time of the UPS battery in the communication room should be greater than the time from the suspension of the mains power to the recovery or until the generator set is normal.

The effect of the thermal relay is mainly used to carry out overload maintenance on the asynchronous motor, his operating principle is that after the overload current passes through the thermal element, the bimetal sheet is heated and bent to advance the action mechanism to drive the contact action, so as to disconnect the motor control circuit to complete the motor power-off thermal relay ...

In general, depending on the phenomenon of equipment problems, the scope of the problem can be roughly confirmed as follows: 1) All button functions fail, and there is a high possibility of power supply or fuse problems. 2) Some buttons are invalid, and some of the buttons are functioning normally ...

Reducing power consumption is also a key point reflected, because Taiwan imports power proportion of 99%, improve power efficiency, comprehensive development of power transformation is the absolute direction, in the future Schneider each new product will also buckle the two major tones of energy saving and intelligence, in the words quite Schneider to from the power expert identity ...

There are many novices who are not familiar with the fake load when repairing the inverter, and the repair of the inverter saves many of their modules with the false load, because the novice repairer generally does not know how to do this, and now the light is on to make it clear that the module is going to be broken. A false load is a resistor with a few hundred ohms ( ...