FTT7111 – Overfluxing Relay
Products family :
Sector : Industry
The FTT 7111 is dedicated to the protection of power transformers against overfluxing. Saturation of the magnetic circuit would increase the losses. The associated heating involves premature ageing of the insulation, which can lead to internal faults and breakdown.
The flux in the magnetic circuit is proportional to the voltage applied to the transformer, and inversely proportional to its frequency. The FTT 7111 relay analyzes an image of the value V/f and compares it with an adjustable maximum threshold.
ANSI codes
24 – Overfluxing