MR VACUTAP VMS - Technical Data; Technical Data for On-Load Tap-Changer; On-Load Tap-Changer Properties; Permissible Ambient Conditions

8 Technical data
Maschinenfabrik Reinhausen GmbH 2020 595993419/02 EN VACUTAP
®
VMS
®
8 Technical data
An overview of all key technical data for the on-load tap-changer and motor-
drive unit exists in the form of separate documents, which are available on
request.
8.1 Technical data for on-load tap-changer
8.1.1 On-load tap-changer properties
Electrical data
On-load tap-changer VMSIII400Y VMSIII650Y
Max. rated through-current I
rm
[A] 400 650
Rated short-time current [kA] 4 6.5
Rated duration of short-circuits [s] 3
Rated peak withstand current [kA] 10 16.25
Max. rated step voltage U
irm
[V]
1)
1300
Step capacity (P
StN
) [kVA] 520 845
Rated frequency [Hz] 50...60
Table8: Electrical data for VACUTAP®VMSIII, selector size C
1)
The maximum rated step voltage may be exceeded by 10 % due to
overexcitation of the transformer if the step capacity is limited to its rated
value.
Mechanical data
Number of operating positions Without change-over selector: maximum 18
With change-over selector: maximum 35
Number of equipped sectors 3
Selector sizes C
Dimensions See dimensional drawings
Weight
Displacement and oil volume
Table9: Mechanical data for VACUTAP®VMSIII, selector size C
8.1.2 Permissible ambient conditions
Air temperature during operation -25°C…+50°C
Temperature of the insulating fluid in operation -25°C…+105°C (up to +115°C when the transformer is in
emergency operation)
Transport temperature, storage temperature -40°C…+50°C