User Manual

Description
2.4 Electronic trip unit ETU600
3WA Air Circuit Breakers
96 Equipment Manual, 05/2021, 92310000002-03
ETU600 LSIG Hi-Z
Protective function
Setting range
G: Ground-fault protection GF Hi-Z
Tripping
Can be switched on/off
Method of ground-fault detection Residual Detection of the ground-fault current
through calculation of the total current
in all phases of the N-conductor
Dual Hi-Z,
for high-impedance connection of the
external current transformers
UREF protection zone: Detection of the
ground-fault current through calcula-
tion of the total current
REF protection zone: Measurement of
the ground-fault current using an ex-
ternal current transformer combination
Characteristic GF curve
with LSIG GFx option plug
I
0
t / I
2
t / I
4
t / I
6
t
Current setting Ig
with LSIG GFx option plug
UREF protection zone Depending on the size:
• Size 1 / 2: 100 … 2000 A
• Size 3: 400 … 2000 A
REF protection zone
15 … 2000 A
Tripping time t
g
For I
x
t = OFF
0 … 5 s
For I
x
t = ON at 3 x Ig
in UREF protection zone
0 … 30 s
Intermittent acquisition
Can be switched on/off
G: Ground-fault GF alarm
Alarm Can be switched on/off
Current setting Ig alarm
with LSIG GFx option plug
UREF protection zone Depending on the size:
• Size 2: 100 … 5000 A
• Size 3: 400 … 5000 A
Alarm time t
g alarm
0 … 0.5 s
Switching between the parameter sets
Switching between the parameter sets A and B can be done manually via:
• Display of the ETU600
• Digital ETU600 input on circuit breaker, terminals X8-5 and X8-6
• Input signal on a digital input/output module
• Switchover command via a communication module
• SENTRON powerconfig configuration software
For security reasons, parameter set B can only be deactivated using the same method by
which it was activated.