ABB REG650 - Page 50

Table 45. Overexcitation protection OEXPVPH
Function Range or value Accuracy
Operate value, start (100–180)% of ( UBase /f
rated
) ± 0.5% of U
Operate value, alarm (50–120)% of start level ± 0.5% of U
r
at U ≤ U
r
± 0.5% of U at U > U
r
Operate value, high level (100–200)% of ( UBase /f
rated
) ± 0.5% of U
Curve type IEEE
2
(0.18 )
:
( 1)
k
IEEE t
M
×
=
-
EQUATION1319 V1 EN (Equation 2)
where M = (E/f)/(Ur/fr)
± 5% + 40 ms
Minimum time delay for inverse
function
(0.000–60.000) s ± 0.5% ± 25 ms
Alarm time delay (0.00–9000.00) ± 0.5% ± 25 ms
Table 46. 100% Stator E/F 3rd harmonic STEFPHIZ
Function
Range or value Accuracy
Fundamental frequency level UN
(95% Stator EF)
(1.0–50.0)% of UBase ± 0.5% of U
r
Third harmonic differential level (0.5–10.0)% of UBase ± 5.0% of U
r
Third harmonic differential block
level
(0.1–10.0)% of UBase ± 5.0% of U
r
Timers (0.020–60.000) s ± 0.5% ± 25 ms
Filter characteristic:
Fundamental
Third harmonic
Reject third harmonic by 1–40
Reject fundamental harmonic by
1–40
-
Generator protection REG650
1MRK 502 050-BEN B
Product version: 1.3
50 ABB