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7 Operation
Maschinenfabrik Reinhausen GmbH 2019
213
5163667/06 EN
ETOS
®
IM
If the capacitance of one or two bushings changes, the difference in capaci-
tance also changes. If the difference in capacitance is greater than the set
limit value, the device triggers an event message.
C1
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
ΔC1
t
ΔC1>>
ΔC1>
5 %
10 %
L3
L1
L2
L1
L3
L2
1
Figure 160: Capacitance monitoring
1 Status of the bushing
(gray: ok, yellow/red: limit
value exceeded)
C1 Capacitance C1
ΔC1 Capacitance difference
ΔC1
ΔC1> Limit value ΔC1>
ΔC1>> Limit value ΔC1>>
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.
To monitor the capacitance of the bushings, the following parameters must
be set for commissioning the transformer:
▪ F1/F2-C: Activate cap. monitoring
▪ F1/F2-C: C1 Phase L1/L2/L3
▪ F1/F2-C: ΔC1 >
▪ F1/F2-C: ΔC1 >>
▪ F1/F2-C: Perform standardization
Содержание ETOS IM
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