Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_55 ( freq INTEGER, owner VARCHAR, day_power___w__ VARCHAR )

### Question ###
What is the WPW freq with a day power of 250?

### Accurate SQL ###

SELECT SUM(freq) FROM table_name_55 WHERE owner = "wpw" AND day_power___w__ > 250