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

8 Technical data
Maschinenfabrik Reinhausen GmbH 2020 755788897/03 EN VACUTAP
®
VVS
®
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 VVS III 400 Y
Number of phases and application 3, neutral point
Max. rated through-current Ium (in A) 400
Rated short-time current (in kA) 4
Rated duration of short-circuits (in s) 3
Rated peak withstand current (in kA) 10
Maximum rated step voltage Uim (in V) 1300
Step capacity (PStN, in kVA) 400
Rated frequency (in Hz) 50, 60
Table8: Electrical data
Mechanical data
Number of operating positions with change-over selector: max. 19
Weight On-load tap-changer assembly, with-
out oil: approx. 220 kg
On-load tap-changer head cover with
integrated motor-drive unit without
pressure relief device: approx. 35 kg
Displacement (in dm
3
) 170
Oil fill quantity Vs and minimum useful volume V2 of oil conservator
1)
(in dm
3
) V
s
: 140; V
2
: 21
Table9: Mechanical data
1)
Applies to temperature range of -30 °C…+100 °C
8.1.2 Permissible ambient conditions
Air temperature during operation -25 °C…+50 °C
Oil temperature during operation -25 °C…+105 °C (up to +115 °C when the transformer is in
emergency operation)
Transport temperature, storage temperature -40 °C…+50 °C
Drying temperatures See installation and commissioning instructions, chapter "As-
sembly"