How to explain why the electricity meter shows that there is still 30 degrees but the power has been cut off

Jiaodong Online News: A netizen recently left a message on this column reflecting: I am a resident of the eastern area of Fushun Garden in Nanyao. Today, my home still has 30 kWh of electricity left but it was cut off. After inquiring, many residents in our community have encountered this situation. How can I explain it? The magnetic card electric meter will automatically power off once when there is remaining alarm power, reminding customers that the remaining power in the meter is not much and they need to purchase electricity in a timely manner. If the customer inserts the power card, the meter will automatically restore power supply, http://www.zbwf.net