Siemens SENTRON 3WA1 - Page 558

Appendix
A.1 Basic settings of the electronic trip unit on delivery
3WA1 air circuit breaker
556 Equipment Manual, 02/2023, 92310000002-06
ETU600 LSIG Hi-Z
Protective function
Basic setting
Primary/secondary ratio
1000
G: Ground-fault protection GF Hi-Z
Tripping
Off
Method of ground-fault detection
Dual Hi-Z
Characteristic GF curve
I
0
t
UREF current setting I
g
Depending on the size:
• Size 2: 100 A
• Size 3: 400 A
UREF tripping time t
g
0.1 s
REF secondary current setting I
g
0.05 A
REF alarm 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:
• Size 2: 100 A
• Size 3: 400 A
Alarm time t
g alarm
0.1 s