At installation site . 3 . the capacitance tolerance in each serial group and segment shold no more than 0 . 5 % . the ratio between maximum value and minimum value of capacitance which is measured at any two termin - als of capacitor unit in three phases should no more than 1 . 02 3 .电容器内部每个串联组串联段间的电容之差不大于0 . 5 % ,三相单元中在任何两个线路端子之间测得的最大电容与最小电容之比不超过1 . 02 。