Are there any requirements of CE switches' power modules on input voltage fluctuation

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Power modules used on CE series switches are independent of each other. You only need to ensure that the input voltage of each power module fluctuates within the specified range and do not need to care about differences in the voltage phases or amplitudes of different power modules.

Other related questions:
Does a 3000 W AC&high-voltage DC power module support AC power input on CE12800 series switches
A 3000 W AC&high-voltage DC power module supports 220 V/110 V AC power input and 240 V DC input, and provides 53.5 V DC/3000 W output. Description: When AC power supply is used and the input voltage is lower than or equal to 175 V AC, the rated output power reduces to 1500 W.

Are CE series switches required to use matching power modules
CE series switches must use matching power modules. Using unmatched power modules may cause unexpected risks. The chassis and power modules adopt foolproof designs to prevent misuse of power modules. For the mapping between CloudEngine chassis models and power modules, see the "Power Module" section in the Hardware Description.

How do I calculate the number of power modules required on a CE switch
Description
How do I calculate the number of power modules required on a CE switch?
Solution
Calculate the total power consumption of all working modules on the switch and divide this value with the maximum power that a power module can provide. Add 1 to the integer part of the calculation result. The sum N is minimum number of power modules required for the switch. In real-world applications, more than N power modules are configured to implement power redundancy. The power modules can work in N+1 or N+N backup mode.
For example, a CE12808 chassis uses 2700 W AC power modules and is configured with two 48*10GE interface cards, five CE-SFU08A cards, and two MPUs.
With this configuration, the maximum power consumption of the chassis is 2455 W. 2455 W divided by 2700 W is smaller than 1, so the integer part is 0. That is, a minimum of one power module is required (0 + 1 = 1). Considering power redundancy, the number of power modules used on the chassis is:
In N+1 backup mode: N + 1 = 1 + 1 = 2
In N+N backup mode: N + N = 1 + 1 = 2
For details, visit http://support.huawei.com/onlinetoolsweb/network_configtool/index.jsp?lang=en&audience=enterprise

Solution of abnormal input to the power module
You can take the following measures if input to the power module is abnormal: If the power supply is abnormal, check whether the power modules and power cables are securely connected. If the inputs of multiple power modules are abnormal, check whether the patch board has normal input.

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