The PSE policy only applies to the situation that when a new
board (PSE) is inserted, and the power is overload.
A value of priority(2) means that the power will stop supplying
to the low priority PSE. About PSE priority, please refer to
h3cMainPsePowerPriority. A value of disabled(1) means that the
power will stop supplying to the new inserted PSE. The default
value of this object is disabled(1).