Description
2.4 Electronic trip unit ETU
Air circuit breaker 3WL10
58
Manual, 11/2017, L1V30499596002-01
Protection functions of the ETU
ETU650 LSI
ETU660 LSIG
G
GF: Ground-fault protection
Protection function can be enabled/disabled
—
●
Characteristic
—
I²t / t = constant
Default value: t = constant
Setting range for operating value I
g
= I
n
x …
—
0.1 to 1 (in steps of 0.001)
Default value: 0.1
Tolerance
1)
: ± 7%
Setting range for delay time t
g
(fixed) t=k
—
0.1 to 1 s (in steps of 0.05)
Default value: 0.1 s
Tolerance
1)
: The better value
out of ± 10% or ± 40 ms or
50 ms with
t
g
= instantaneous
Setting range for delay time t
g
at I²t
(reference point 2 x I
g
)
—
0.1 to 1 s (in steps of 0.05)
Ground-fault protection pre-alarm
—
50 to 90 % x I
r
(in steps of
1 %)
Default value: 90 %
Tripping can be deactivated
—
●
Switchover to the alternative of the external,
directly measured ground-fault protection
—
●
Default value: OFF
Switchover to alternative operating values with
ground-fault current during the switch-on phase
(inrush adaptation) for tripping characteristic t=k
(fixed) possible
—
●
Default value: OFF
Setting range of the switch-on phase
(inrush adaptation)
—
0.1 to 30 s (in steps of 0.01)
Default value: 0.1
Setting range I
g
= I
n
x … during the switch-on
phase (inrush adaptation)
—
0.2 to 1 (in steps of 0.01)
Default value: 1
Extended parameter range with ext. auxiliary
power supply of the ETU
—
- I
g
full range,
otherwise I
g
limited to
min. 0.2 I
n
or 0.25 I
n
(for
I
n
= 400 A)
- t
g
possible instantaneously
Summary of Contents for SENTRON 3WL10
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Page 8: ...Table of contents Air circuit breaker 3WL10 6 Manual 11 2017 L1V30499596002 01 ...
Page 170: ...Operation 6 3 Troubleshooting Air circuit breaker 3WL10 168 Manual 11 2017 L1V30499596002 01 ...
Page 180: ...Technical specifications Air circuit breaker 3WL10 178 Manual 11 2017 L1V30499596002 01 ...
Page 199: ...Air circuit breaker 3WL10 Manual 11 2017 L1V30499596002 01 197 Circuit diagrams 10 ...
Page 212: ...Circuit diagrams Air circuit breaker 3WL10 210 Manual 11 2017 L1V30499596002 01 ...
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