About 30 people were evacuated from the Telstra Tower following a small electrical fire on Friday morning.

The Emergency Services Agency said about 30 people were evacuated after the fire was sparked in a refrigeration unit at the tower, on Black Mountain Drive.

Fire crews were on the scene about 11am, commencing ventilation and air monitoring operations. It was completed by noon, and all staff were able to return to the building.

ACT Ambulance Service intensive care paramedics were called to the scene to assess one female patient for suspected smoke inhalation.

Transport to hospital was not required.