MR VACUTAP VM I 1002, Operating Instructions Manual, Page: 18 / 82

3 Product description
Maschinenfabrik Reinhausen GmbH 2020 18 4360571/02 EN VACUTAP
®
VM
®
3.1.2.1 Pipe connections
The on-load tap-changer head features 4 pipe connections for different pur-
poses.
Depending on the order, some or all of these pipe connections are fitted with
pipe bends ex factory. All pipe bends without terminal box for the tap-change
supervisory control can be freely swiveled once the pressure ring is loos-
ened.
Figure 3: Pipe connections with pipe bends
Pipe connection Q
The pipe connection Q is closed with a blank cover. If the on-load tap-
changer is equipped with a tap-change supervisory device, the connection
cables for the tap-change supervisory device are fed through the pipe con-
nection.
The functions of the R and Q pipe connections can be interchanged.
Pipe connection S
The pipe bend on pipe connection S features a vent screw and can be con-
nected to a pipe that ends with a drain valve on the side of the transformer
tank at operating height. If the on-load tap-changer is fitted with an oil suc-
tion pipe, the on-load tap-changer can be completely emptied via pipe con-
nection S.
Pipe connection R
Pipe connection R is intended for attachment of the protective relay and con-
nection of the on-load tap-changer oil conservator and can be interchanged
with pipe connection Q.