how to just get time from a date

hello

I am just trying to get a time from the query I have and its giving me the default date then my time. The time is the only part that I need in that field.

What i get

1900-01-01 00:00:55.000

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what i need

00:00:55

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my SQL

 select  datediff(hour, 0, cast(CallTime as time)),
  DATEADD(ms, SUM(DATEDIFF(ms, '00:00:00.000',  convert(varchar(10), dateadd(second, Duration, 0), 108))), '00:00:00.000') as time
  from NT_API_CallLogs
 WHERE Duration <> 0
 AND cast(CallTime as date) = '2017-3-08'
GROUP BY datediff(hour, 0, cast(CallTime as time) )
ORDER BY datediff(hour, 0, cast(CallTime as time) )

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