Siemens SENTRON 3WL10, Manual

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Description
2.4 Electronic trip unit ETU
Air circuit breaker 3WL10
54
Manual, 11/2017, L1V30499596002-01
2.4.3 Parameters of the trip units
The parameter values of the trip units that can be set are listed below.
Electronic trip units of the 3-series
Protection functions of the ETU ETU320 LI ETU350 LSI ETU360 LSIG
L LT: Overload protection
Setting range of operating value I
r
= I
n
x
…
0.4; 0.5: 0.6; 0.7; 0.75;
0.8; 0.85; 0.9; 0.95; 1
Default value: 0.4
Tolerance
1)
: Tripping
between 1.05 and
1.2 x I
r
0.4; 0.5: 0.6; 0.7; 0.75;
0.8; 0.85; 0.9; 0.95; 1
Default value: 0.4
Tolerance
1)
: Tripping
between 1.05 and
1.2 x I
r
0.4; 0.5: 0.6; 0.7; 0.75;
0.8; 0.85; 0.9; 0.95; 1
Default value: 0.4
Tolerance
1)
: Tripping
between 1.05 and
1.2 x I
r
Setting range for delay time t
r
at I²t
(reference point 6 x I
r
)
0.75; 1; 2; 5; 8; 10; 14;
17; 21; 25 s
Default value: 0.75 s
Tolerance
1)
:
± 10% I ≤ 6 x I
n
± 20% I > 6 x I
n
0.75; 1; 2; 5; 8; 10; 14;
17; 21; 25 s
Default value: 0.75 s
Tolerance
1)
:
± 10% I ≤ 6 x I
n
± 20% I > 6 x I
n
0.75; 1; 2; 5; 8; 10; 14;
17; 21; 25 s
Default value: 0.75 s
Tolerance
1)
:
± 10% I ≤ 6 x I
n
± 20% I > 6 x I
n
Overload pre-alarm 50 to 100% x I
r
(in steps of 1%)
Default value: 90%
50 to 100 % x I
r
(in steps of 1 %)
Default value: 90 %
50 to 100% x I
r
(in steps of 1 %)
Default value: 90 %
S ST: Short-time-delayed short-circuit protection
Protection function can be enabled/
disabled
— ● ●
Setting range of operating value
I
sd
= I
n
x …
— 1; 1.5; 2; 2.5; 3; 4; 6;
8; 10
Default value: OFF
Tolerance
1)
:
± 7% I ≤ 6 x I
n
± 10% I ≤ 6 x I
n
1; 1.5; 2; 2.5; 3; 4; 6;
8; 10
Default value: OFF
Tolerance
1)
:
± 7% I ≤ 6 x I
n
± 10% I ≤ 6 x I
n
Characteristic (switchover possible) — I²t / t = constant I²t / t = constant
Setting range for delay time t
sd
(fixed
delay) t=k
— 0.08; 0.15; 0.22; 0.3;
0.4
Tolerance
1)
:
The better value out of
± 10 % or ± 40ms
0.08; 0.15; 0.22; 0.3;
0.4
Tolerance
1)
:
The better value out of
± 10 % or ± 40ms
Setting range for delay time t
sd
at I²t
(reference point 10 x I
n
)
— 0.1; 0.2; 0.3; 0.4; 0.5
Default value: 0.1 0.1; 0.2; 0.3; 0.4; 0.5
Default value: 0.1
I INST: Instantaneous short-circuit protection
Protection function can be enabled/
disabled
● ● ●
Setting range for operating value
I
i
= I
n
x …
1.5; 2; 3; 4; 6; 8; 10;
12; 15
Default value: 1.5
Tolerance
1)
: ± 10%
1.5; 2; 3; 4; 6; 8; 10;
12; 15
Default value: 1.5
Tolerance
1)
: ± 10%
1.5; 2; 3; 4; 6; 8; 10;
12; 15
Default value: 1.5
Tolerance
1)
: ± 10%