Our company manufacture in nuclear Cable Tray and have been exported to India. Compared with the normal cable tray, nuclear cable tray requires more technically demand, and our company makes full use of robot welding, not only for better look, but also solid. Cable tray is an important equipment in nuclear power station. The cable trays in nuclear power plants must have good seismic performance, which is an important condition for nuclear power plants to operate safely or piled safely. Structurally, nuclear cable tray can be divided into two types: ladder type and perforated type. Ladder type cable tray is generally applicable to cable laying with large diameter, especially for high and low voltage power cable laying; perforated type cable tray is not only suitable for the installation of power cable , also suitable for the control of cable laying.
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The 616G3 uses a two-stage switching power supply, somewhat similar to the Fuji G5. The first-stage switching power supply converts more than 500 volts of DC voltage on the DC bus side to more than 300 volts DC voltage. Then through the secondary coil of high-frequency pulse transformer output 5V, 12V, 24V and other lower voltage for the inverter control board, drive circuit, detection circuit, etc. to do the power use. In the design of the second-stage switching power supply, Yaskawa uses a controlled voltage regulator device called TL431 to adjust the duty cycle of the switching transistor so as to stabilize the output voltage.
The LG inverters that we talked about in previous issues also use similar control methods. The QM5HL-24 and TL431, which are used as switch tubes, are all easily damaged devices. In addition, if we hear harsh screams during use, this is caused by a pulse transformer. It is very likely that there is a short circuit on the output side of the switching power supply. We can find the fault from the output side. In addition, when there is no display, the control terminal has no voltage, DC12V, 24V fan does not run, we should first consider whether the switching power supply is damaged.
Inverter's switching power supply damage repair
Switching power supply repair damage to the drive <br> <br> drive in the course of the switching power supply damaged advantages will appear. The switching power supply damage is the most common failure of many inverters, usually caused by the short circuit of the load of the switching power supply. In the design of switching power supply lines of many inverters, Yaskawa's inverter is more successful because of this. Here we use Yaskawa's inverter as an example to introduce its maintenance method: