3 Product description
Maschinenfabrik Reinhausen GmbH 2020
18
5788897/03 EN
VACUTAP
®
VVS
®
3.1.3 Nameplate and serial number
The nameplate with serial number is on the on-load tap-changer head cover.
Figure 4: Nameplate
3.1.4 Protective devices
The on-load tap-changer is equipped with the following protective devices.
3.1.4.1 Protective relay
3.1.4.1.1 Function description
The protective relay is looped into the circuit breaker tripping circuit, thus
protecting the on-load tap-changer and transformer in the event of a fault
within the on-load tap-changer oil compartment. It is tripped when the speci-
fied speed of flow from the on-load tap-changer head to the oil conservator
is exceeded due to a fault. The flowing insulating fluid actuates the flap valve
which tips over into position OFF. The contact in the dry-reed magnetic
switch is thereby actuated, the circuit breakers are tripped, and the trans-
former is de-energized.
The protective relay is a component of an on-load tap-changer filled with in-
sulating fluid and its properties conform to the respective applicable version
of IEC publication 60214-1.
Diverter switch operations at rated switching capacity or at permissible over-
load will not cause the protective relay to trip.
The protective relay responds to flow, not to gas accumulated in the protec-
tive relay. It is not necessary to bleed the protective relay when filling the
transformer with insulating fluid. Gas accumulation in the protective relay is
normal.
Summary of Contents for VACUTAP
Page 1: ...On load tap changer VACUTAP VVS Operating Instructions 5788897 03 EN ...
Page 82: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 82 5788897 03 EN VACUTAP VVS 9 Drawings ...
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