MR OILTAP R, Installation And Commissioning Instructions, Page: 189 / 206

11 Appendix
Maschinenfabrik Reinhausen GmbH 2015 189 4427410/00 EN OILTAP® R
Appendix
Limit values for dielectric strength and water content of on-
load tap-changer oil
The following tables provide the limit values for dielectric strength (measured
in accordance with IEC 60156) and water content (measured in accordance
with IEC 60814) of the on-load tap-changer oil for OILTAP® on-load tap-
changers. The values have been established on the basis of IEC 60422.
U
d
H
2
O
When commissioning the trans-
former for the first time > 60 kV/2.5 mm < 12 ppm
During operation > 30 kV/2.5 mm < 40 ppm
After maintenance > 50 kV/2.5 mm < 15 ppm
Table 15: Limit values for on-load tap-changer oil in neutral point applications
U
d
H
2
O
When commissioning the trans-
former for the first time > 60 kV/2.5 mm < 12 ppm
During operation > 40 kV/2.5 mm < 30 ppm
After maintenance > 50 kV/2.5 mm < 15 ppm
Table 16: Limit values for on-load tap-changer oil in delta-type applications
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