MR ETOS IM - Page 216

7 Operation
Maschinenfabrik Reinhausen GmbH 2019216 5163667/06 ENETOS
®
IM
7.15.2.2 Configuring dissipation factor monitoring
The device monitors the change in difference of dissipation factor tanδ be-
tween the phases. If tanδ of all 3 phases changes in the same way (e.g. due
to a temperature change), the difference in the dissipation factor Δtanδ re-
mains constant.
If the dissipation factor of one or two bushings changes, the difference in dis-
sipation factor also changes. If the difference in dissipation factor is greater
than the set limit value, the device triggers an event message.
tanδ
t
Max.
Min.
Sollwert
Max.Min. Analogsignal
0,3 Pt, gestrichelt (5, 25)
1,5 Pt, rgb(0,147,214)
0,7 Pt, Pfeil (Voll, 4, 30)
Arial 9 Pt
Δtanδ
t
Δtanδ>
L3
L1
L2
L1
L3
L2
1
Figure162: Dissipation factor monitoring
1 Status of the bushing
(gray: ok, yellow/red: limit
value exceeded)
tanδ Dissipation factor tanδ
Δtanδ Dissipation factor differ-
ence Δtanδ
Δtanδ> Limit value Δtanδ>
L1, L2, L3 Phase L1, L2, L3
If bushing monitoring with the option "Monitoring of 6 bushings" is used, the
parameters for both field 1 (F1) and field 2 (F2) must be set. Field 1 and
field 2 each describe a set consisting of 3 bushings respectively. If bushing
monitoring with the option "Monitoring of 3 bushings" is used, only the pa-
rameters for field 1 are displayed.