Since last year, more and more products have been installed in low voltage cabinets, but the installation is reasonable, but they are often ignored. Now, talk about the reactor installation.
First of all, let's review the problems in the installation of the call register during the year. A plurality of capacitors in the production of a contract last year, after the installation of supporting the installation of reactors all serious bending phenomenon, the main reason for this problem is the installation of supporting structure is not reasonable so that the strength is not enough, after the installation of supporting again design, re processing, workshop demolition, two installation only after solving, and remove the install support for drilling can cause unnecessary waste, based on the above summary of the problem research, in the design process of low voltage reactor installation should pay attention to the following items:
1. first of all, consider the reactor volume, weight, specifications, quantity and installation methods.
2. reactor mounting should have enough strength, usually should use the groove plate, try not to use angle iron. The groove plate shall be designed with high 60mm and hem 30mm, with 2.5mm thick galvanized sheet.
3. special specifications of the reactor shall be designed separately according to special conditions, taking into account the reduction or increase of the size of the channel plate.
4., the installation must be solid, and with other components to leave a certain heat clearance, it is necessary to ensure adequate electrical clearance, wiring should also consider convenience.
How should the frequency converter use reactor? The following aspects are analyzed from the selection of rated AC current, the selection of voltage drop, the inductance, the inductance of the rated current and the length of the cable.
1. selection of rated AC current
The rated AC current is designed from the heating aspect of the reactor's long operating current, while sufficient harmonic components should be considered. That is, the output current of the output reactor is the output current of the motor load of the inverter.
2. voltage drop
Voltage drop is the actual voltage drop at the end of the reactor coil when 50HZ corresponds to the actual rated current. Usually the voltage drop is about 4V~8V.
3. selection of inductance
The rated inductance of the reactor is also an important parameter! If the inductance is not suitable, it will directly affect the voltage drop under the rated current, thus causing a fault. The magnitude of inductance depends on the sectional area of the core of the reactor, the number of turns of the coil and the adjustment of the air gap.
4. inductance and cable length corresponding to rated current:
电缆长度 额定输出电流 电感量
Cable length, rated output current, inductance