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Settings
Curve A
Curve B
Voltage level 4
-
0.9 · Un
Recovery time 4
-
1500 ms
Voltage level 5
-
0.9 · Un
Recovery time 5
-
3000 ms
It is necessary that the last active
Voltage level X
setting is set greater than
or equal to
Voltage pickup value
. Settings are not accepted if the last active
Voltage level X
setting is not set greater than or equal to
Voltage pickup
value
.
describes an example of operation of 27RT protection function set to operate
with
Num of pickup phases
set to “Exactly 2 of 3” and
Voltage selection
as “Lowest Ph-
to-Ph” voltage.
Time in ms
Vn
Voltage
xVn
TRIP
PICKUP
Voltage pickup value
PICKUP
Num of start phases =
Exactly 2 of 3
Voltage selection
= Lowest Ph-to-Ph
TRIP
V_AB
V_CA
V_BC
100ms
GUID-532E4687-DF59-4DA7-9F93-6186FBA14C64 V1 EN
Figure 331:
Typical example of operation of 27RT function
Activation of the
BLOCK
input resets the timers and deactivates the function outputs.
Section 4
1MAC059074-MB A
Protection functions
662
615 series ANSI
Technical Manual
Содержание Relion 615 series
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