Logic Diagram; Technical Data - ABB REG650 Technical Manual

1MRK 502 034-UEN -
8.4.7.6
8.4.8
Technical Manual

Logic diagram

BLOCK
U3P
Calculation
Ei
of internal M=
induced
(Ei / f)
voltage Ei
(Ur / fr)
IEC09000161 V2 EN
Figure 124: A simplified logic diagram of the Overexcitation protection
OEXPVPH
Simplification of the diagram is in the way the IEEE delays are calculated. The
cooling process is not shown. It is not shown that voltage and frequency are
separately checked against their respective limit values.

Technical data

Table 149: OEXPVPH technical data
Function
Operate value, start
Operate value, alarm
Operate value, high level
Curve type
Minimum time delay for inverse
function
Alarm time delay
AlarmLevel
t
tAlarm
M>V/Hz>
t
V/Hz>
tMin
k
M
M
kForIEEE
1800 s
t
M>V/Hz>>
V/Hz>>
M = relative V/Hz as service value
Range or value
UBase /f
(100–180)% of (
(50–120)% of start level
(100–200)% of ( UBase /f
IEEE
×
(0.18 ) k
=
IEEE t :
-
2
( M 1)
EQUATION1319 V1 EN
where M = (E/f)/(Ur/fr)
(0.000–60.000) s
(0.000–60.000) s
Section 8
Voltage protection
ALARM
&
t>tAlarm
t>tMin TRIP
&
³1
IEC09000161_2_en.vsd
Accuracy
) ± 0.5% of U
rated
± 0.5% of U
± 0.5% of U at U > U
) ± 0.5% of U
rated
Class 5 + 40 ms
(Equation 84)
± 0.5% ± 25 ms
± 0.5% ± 25 ms
at U ≤ U
r r
r
245