MR VACUTAP VMS - Page 24

3 Product description
Maschinenfabrik Reinhausen GmbH 202024 5993419/02 ENVACUTAP
®
VMS
®
Figure11: Pressure monitoring device with cover cap and ventilation
1 Ventilation 2 Cover cap
3.1.4.3 Rupture disk
The rupture disk is a pressure relief device without signaling contact in ac-
cordance with IEC 60214-1 and is located in the on-load tap-changer head
cover.
The rupture disk responds to a defined overpressure in the oil compartment
of the on-load tap-changer.
3.1.4.4 Pressure relief device MPreC®
On request, MR will supply a pre-fitted MPreC® pressure relief device in
place of the rupture disk. This device responds to a defined overpressure in
the oil compartment of the on-load tap-changer.
The on-load tap-changer therefore meets the requirements of IEC 60214-1
regarding pressure relief devices.
3.1.4.5 Temperature monitoring
The temperature monitoring system monitors the temperature of the insulat-
ing fluid in the oil compartment of the on-load tap-changer.