MR VACUTAP VV, Инструкции по установке и вводу в эксплуатацию

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3 Product description
Maschinenfabrik Reinhausen GmbH 2020 23 4349322/01 EN VACUTAP
®
VV
®
3.2.4.1.3 Nameplate
The nameplate is on the back of the protective relay.
Figure 8: Nameplate
3.2.4.2 Pressure monitoring device DW
3.2.4.2.1 Function description
The DW 2000 pressure monitoring device protects the on-load tap-changer
from impermissible pressure increases, contributing to the safety of the
transformer. The pressure monitoring device is installed on the outside of the
on-load tap-changer and is tripped by impermissible static and dynamic
pressures in the on-load tap-changer oil compartment.
The pressure monitoring device uses a concept where a corrugated tube
acts as a barometer together with a spring providing counter force. This as-
sembly is mechanically linked to the sensor on the snap-action switch.
The pressure increase activates the sensor on the snap-action switch, which
flips into the OFF position. This triggers the circuit breaker and de-energizes
the transformer. The sensor on the snap-action switch has to be reset to the
initial position by hand after tripping.
Low-energy interference does not cause the pressure monitoring device to
trip since the required tripping pressure is not reached. The tripping pressure
is set at the factory and prevented from being changed.
The pressure monitoring device responds to large pressure increases faster
than the protective relay. The protective relay is part of the standard MR pro-
tection system and comes as standard.
Additional use of a pressure monitoring device also requires installation of
the provided protective relay.
The features and characteristics of the pressure monitoring device comply
with the respective applicable version of IEC publication 60214-1.