I. The switches in the electric control cabinet are shown in the following figure.
Figure 1 Internal view of electric control box
2.The system first power-up precautions
After the whole system wiring is completed, the unit can be powered on for commissioning.
However, before powering on, it is also necessary to use a multimeter to measure whether there is a short circuit between phase and phase, between phase and zero, between phase and ground, and between zero and ground on the site of the two power sources. If there is none, it means that the power can be powered on normally. If any of the above short-circuit conditions exist, the fault should be investigated before powering up.
After the front end of the system is powered on (the system itself is not yet powered on), you also need to measure the voltage of the front end to see if it meets the power requirements of the device.
The power requirements of the device are: AC415V±5%, 60Hz.
Translated with www.DeepL.com/Translator (free version)
3. The system power-up sequence
When the front end of the system is powered up, and the voltage meets the requirements of the device, then the system can be powered up at this time.
1: First power up the electronic control box.
When the electric control cabinet door is open, open MCB17 first, then MCB 18, MSS6 and then the inverter front-end circuit breaker. mcb-DC1, mcb-DC2 and mcb-DC3 are 24V, 12V and 5V DC switches. After powering on, make sure the three switches are on. At this point, the screen on the cabinet door and the PLC start working.
When the electric control cabinet door is closed and the system needs to be energized, first open MCB18, MSS6, MCB-DC1, MCB-DC2, MCB-DC3 and the protection switch on the front of the inverter in the cabinet, then close the cabinet door and open MCB17 by the cabinet door operation handle. at this time, the unit is energized.
A trained electrician can operate the system via the touch screen to set parameters, modify thresholds, change the operation mode (automatic/manual), start and stop a motor individually or run it automatically. At this point, the liquid cooling system can be run to control the supply temperature within the required temperature range before meeting the conditions for turning on the calculation unit.
2: After the electric control box is powered on, the conditions for turning on the computing unit are met only when the liquid supply temperature is maintained near the target temperature in accordance with the control system operation procedure. At this time, you can open the circuit breakers in distribution cabinets A and B and start to power on the calculation unit. The order of powering up the power distribution cabinet is as follows.
MCB-A1 and A2 are opened first, then MCB-15, 16, 21, 22, B1 and B2 are opened. Next, rows of computing units are started in an orderly manner according to the requirements. Since there are 210 calculation units in total, there are 14 rows. When starting the computing units, you should start one row (15 computing units) and then start the next row after an interval of 20S, and so on.
Translated with www.DeepL.com/Translator (free version).
4.The system power-off sequence
When the system for some reason to power off, according to the requirements, first disconnect the power of the computing unit, which is to ensure that the water temperature before and after the power failure of the computing unit consistent, equivalent to the power module to protect the computing unit.
When the calculation unit power off, and then artificially through the touch screen to make the liquid cooling system to stop working, at this time the water temperature will rise a little, but the system has no impact. Finally, disconnect the total power supply of the electrical control box and distribution cabinet, so that the entire system in a complete power failure.
The above practice is the safety of power off behavior. However, when there is a serious fault in the system, you can directly press the emergency stop button on the door of the container, so that the main circuit breaker of the distribution cabinet, the main circuit breaker of the electric control box tripped instantly, so that the system is in a state of complete power failure, easy for professionals to carry out maintenance work.
*Note: This to the Air China version 1.3 water-cooled container parameters, if your product for other manufacturers or other versions, may be slightly different from this parameter, this parameter is for reference only.
If you have any questions, please feel free to contact the Ant Mining Machine after-sales service