Why are industrial equipment equipped with voltage stabilizers
2024-11-05
The stable operation of industrial equipment requires a stable power supply. Due to the different power standards in each country overseas, safety hazards are prone to occur when adapting to industrial equipment manufactured in China.
[The power supply has the following main effects]
a. Overvoltage: It will cause overvoltage alarms in the CNC system, accelerate the aging of components and even damage.
b. Undervoltage: If the voltage is too low, the CNC system will alarm undervoltage, which will cause the CNC system to crash or restart and cause system parameters to be lost.
c. Voltage fluctuations: It will cause the motor to run unsteadily; data loss; relays and contactors to shake and malfunction.
d. Surge shock: It is easy to cause damage to the CNC system or servo drive components, causing insulation breakdown of electrical equipment; at the same time, it is easy to cause system crashes and data errors.
e. Harmonic interference: The harmonic currents generated by nonlinear loads will affect multiple working links of the CNC system, causing system crashes, resets, data parameter loss, communication failures and false alarms.
1. According to the above-mentioned influence of grid quality defects on industrial equipment, the developed CNC machine tool special voltage stabilizer provides high-quality power quality for industrial equipment through the following aspects.
2. Maintain ±1% accuracy output when the grid voltage fluctuates within ±20%, avoiding the influence of overvoltage, undervoltage, and voltage fluctuation on machine tools.
3. Reduce the influence of harmonics on machine tools through filtering devices.
4. Reduce the influence of surge shock through surge protection devices
What is our solution?
1. Capacity safety factor The AC voltage stabilizer is based on the output apparent power (kVA) as the nominal rated capacity, and in general, the load is not purely resistive, that is, the power factor COS￠≠1, and the actual active power that the voltage stabilizer can output is kW=capacity (kVA)×COS￠. Therefore, in actual selection, it is necessary to reasonably select the voltage-stabilized power supply according to the rated power, power factor and load type of the electrical equipment. The output power should have an appropriate margin, especially when selecting impact loads. The margin should be larger. The specific selection safety factor is shown in the table below. Load nature Equipment type Safety factor Select voltage-stabilized power supply capacity Pure resistive load Incandescent lamp, resistance wire, electric furnace and other equipment 1.25~1.5 1.25~1.5 times the total load power Inductive and capacitive load Fluorescent lamps, fans, motors, water pumps, air conditioners, computers, refrigerators, etc. 2 ~ 3 ≥2~3 times the total load power In the environment of large inductive and capacitive loads (such as motors and computers), the starting current of the load should be considered to be particularly large (up to 5~8 times the rated current) when selecting, so the capacity of the voltage stabilizer should be 2.5~3 times the load power. For example: 1 three-phase motor of 2.2kW and 1 three-phase motor of 5.5kW. When selecting a voltage stabilizer, the capacity should be ≥ (2.2kW + 5.5kW) × 2.5 = 19.25 kVA, that is, at least a three-phase SJW-20 kVA or above voltage stabilizer should be selected.
[Application scope of high-power voltage stabilizer]
The voltage stabilizer can be widely used in: electronic computers, precision machine tools, computer tomography (CT), precision instruments, test equipment, elevator lighting, imported equipment and production lines in industries, medical equipment, oil fields, railways, rail transit, construction sites, schools, hospitals, post and telecommunications, hotels, scientific research departments, etc., where stable power supply voltage is required. It is also suitable for users at the end of low-voltage distribution networks with low or high power supply voltage and large fluctuations, and electrical equipment with large load changes. It is especially suitable for all places with high requirements for power grid waveforms.