Parameters Of The Trip Units - Siemens SENTRON 3WL10 Series Manual

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