With S7300 313C of CPU added IM365 again extended a machine frame. 313C itself since with 24DI16DO and the simulation entered output 5AI/2AO, see Configuration Manual above CPU behind can placed 8 a module, wants to will about, CPU itself integrated of I/O surface to except did? is regardless of is what CPU Hou end … Continue reading S7300 hardware configuration and module power consumption calculation method

Electrical fire caused by line failure is common for many reasons, mainly below for everyone to resolve the main cause of electric lines caught fire and prevention measures.A main cause of the fire, electrical lines:(A) short circuit. So-called short circuit is the circuit of communication two wires touch each other, current does not pass through … Continue reading Causes and prevention methods of electric line fire

General Household circuit, leakage power line zero leakage, if the said method, see:Electrical lines because of the long service life, it will cause the insulation, insulatorsdamaged, damp or worn insulation layer, produced on the line leakage. In total by one meter on the switch, remove the load and connect the load switch.If ammeter pointer swings, … Continue reading How to detect the leakage of the line?

Wire and cable products used in power system are mainly bare overhead wires, bus (bus), power cable (plastic cable, oil paper power cable (basically replace the plastic power cables), rubber cables, overhead insulated cables), branch cable (instead of part of the bus), electric wire with electrical equipment and power equipment wire and cable etc..1, model, … Continue reading Wire and cable specifications

High-voltage switch cabinet is very important in electrical power system equipment.Switchgear condition deterioration is one power causes a system failure. So, what are the common faults of high voltage switch cabinet?(A) outdoor-and indoorFrom the placement of high-voltage switch cabinet, can be divided into both outdoor and indoor, 10KV and below use the indoor type. Under … Continue reading Types of high voltage switchgear and analysis of common faults

A, the causes of short circuit(1) the connection error; (2) the insulation damage; (3) the operation error; (4) the mechanical damageB, the harm of short circuitBecause of the short circuit current without load, only flows in the power source internal resistance is very small, so the current large, strong currents will generate heat effect and … Continue reading How to prevent short circuit between electrical circuits

1, zero-sequence current protection of the protected area is how to divide?I survived the end of the line of zero-sequence current earthing short circuit through the protection the maximum setting of zero sequence currents; do not protect thefull length of the line, but should not be less than the length of the protected circuit15%~20%; zero-sequence … Continue reading Electrical knowledge

Mechanical reasons:① the motor fan is damaged or loose fastening screws of the blades, resulting in fan Ye Gai collide with the wind, its sound with the chink of light is small;II bearing wear or shaft is not straight, causing motor rotor eccentricity, which the stator and rotor are clean, the motor produces excessive vibration … Continue reading How to judge the fault causes from the abnormal vibration and sound of the asynchronous motor?

Result in asynchronous motor no-load current reasons are the following:① voltage too high: when the power supply voltage is too high, the motor produces magnetic saturation of the iron core, leading to excessive no-load current;② motor due to improper Assembly or after repair the gap is too large;③ number of stator winding is not enough … Continue reading What causes the no-load current of the asynchronous motor to be too big?

Causes of shaft voltage produced is as follows:① because of generator stator flux imbalance in the shaft of the generator EMF is on. Reason of unbalanced magnetic field is usually because local magnetic stator core is large (such as corrosion of the stator iron core), as well as between the stator and rotor air gap … Continue reading What is the reason for the generator shaft voltage? What harm does it have on the operation of the generator?