2) Precautions for First Power of the System
After the entire system wiring is completed, the equipment can be powered on for debugging.
However, before powering on, it is necessary to use a multimeter to measure whether there is a
short circuit between phase wires, between phases wire and neutral wire, between phase wire and
ground wire, and between neutral wire and ground wire of the two power supplies. If not, it means
it can be powered on normally. If any of the above short circuits exist, the fault should be identified
first and then powered on. After the front-end of the system is powered on (the system itself is not
yet powered on, and the main switch of the distribution cabinet and main control cabinet are not
closed), it is necessary to measure the voltage of the front-end to see if it meets the power
requirements of the equipment.
The power requirement for this device is AC 400V ± 5%, 50/60Hz.
3) System Power-on Sequence
After the front-end of the system is powered on and the voltage meets the requirements of the
device, the system can be powered on at this time.
1: Firstly, power on the main control cabinet.
When the main control cabinet door is opened, first open QFWCU, and then open all circuit
breakers inside the main control cabinet. QFP1 and QFPZ1 are switches for 24V power supply in
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