Prediction of the Progressive Loss of Winding Clamping Pressure in Power Transformers

Table 1

Maximum strain under 5 MPa of aging pressboards.

Aging hour	Strain (%)	Aging hour	Strain (%)
0	2.90	100	3.32
196	3.50	244	3.62
292	3.88	340	4.04
436	4.26	484	4.43
528	4.62	580	4.69
628	4.84	676	4.99
720	5.13	800	5.54