Siemens SENTRON 3WA1 - Page 557

Appendix
A.1 Basic settings of the electronic trip unit on delivery
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
555
ETU600 LSI, ETU600 LSIG, ETU600 LSIG Hi-Z
Protective function
Basic setting
Zone-selective interlocking ZSI (requires the ZSI200 module)
Received signal acts on short-time-delayed short-circuit
protection ST
On
Received signal acts on ground-fault protection GF
On
Sends signal on pick-up of short-time-delayed short-
circuit protection ST
On
Sends signal on pick-up of ground-fault protection GF
On
Delay t
ZSI
for short-time-delayed short-circuit protection
ST
0.05 s
Delay t
ZSI
for ground-fault protection GF
0.1 s
Monitoring of the ZSI200 module
Off
Rated voltage U
LL
Size 1, 2, 3 with breaking capacity N/S/M/H/C
690 V AC
Size 1 with breaking capacity E
1000 V AC
Size 2, 3 with breaking capacity E
1150 V AC
Rated frequency f
n
Sizes 1, 2, 3
50 Hz
ETU600 LSIG
Protective function
Basic setting
G: Ground-fault protection GF
Tripping
Off
Method of ground-fault detection
Residual
Characteristic GF curve
I
0
t
Current setting I
g
Depending on the size:
• Sizes 1 and 2: 100 A
• Size 3: 400 A
Tripping time t
g
0.1 s
Intermittent detection
Off
G: Ground-fault GF alarm
Alarm
Off
Current setting I
g alarm
Depending on the size:
• Sizes 1 and 2: 100 A
• Size 3: 400 A
Alarm time t
g alarm
0 s
ETU600 LSIG Hi-Z
Protective function
Basic setting
Configuration, measurement of ground-fault current
Shunt resistance
100 Ω