Siemens SENTRON 3WL10 - Page 81

Description
2.8 Electronic trip unit ETU
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
79
Enhanced protection functions - only available with
MF Advanced metering function
ETU650 LSI
ETU660 LSIG
Setting range of the delay time for overvoltage
protection
0.05 to 120 s (in steps of
0.01)
Default value: 10 s
0.05 to 120 s (in steps of
0.01)
Default value: 10 s
Enabling/disabling of tripping on overvoltage
protection
● ●
f
u
Underfrequency protection f
u
Protection function can be enabled/disabled
●
●
Setting range for underfrequency protection f
u
=
f
n
x …
0.9 to 0.999 (in steps of
0.001)
Default value: 0.9
0.9 to 0.999 (in steps of
0.001)
Default value: 0.9
Setting range of the delay time for underfre-
quency protection
3 to 300 s (in steps of 0.01)
Default value: 3 s
3 to 300 s (in steps of 0.01)
Default value: 3 s
Enabling/disabling of tripping on underfre-
quency protection
● ●
f
o
Overfrequency protection f
o
Protection function can be enabled/disabled
●
●
Setting range for overfrequency protection f
o
=
f
n
x …
1.001 to 1.1 (in steps of
0.001)
Default value: 1.1
1.001 to 1.1 (in steps of
0.001)
Default value: 1.1
Setting range of the delay time for overfre-
quency protection
3 to 300 s (in steps of 0.01)
Default value: 3 s
3 to 300 s (in steps of 0.01)
Default value: 3 s
Enabling/disabling of tripping on overfrequency
protection
● ●
PP
Reverse power protection RP
Protection function can be enabled/disabled
●
●
Setting range for reverse power PR = S
n
x … -0.050 … -1.0 (in steps of
0.001)
Default value: -0.1
-0.050 … -1.0 (in steps of
0.001)
Default value: -0.1
Setting range of the delay time for rever-
se power protection
0.5 to 100 s (in steps of 0.1)
Default value: 5 s
0.5 to 100 s (in steps of 0.1)
Default value: 5 s
Definition of direction of power flow Bottom → top; top → bottom
Default value: top → bottom
Enabling/disabling of tripping on reverse power
●
●