Siemens SENTRON 3WA1 - Page 188

Description
2.9 Self-monitoring and diagnostics
3WA1 air circuit breaker
186 Equipment Manual, 02/2023, 92310000002-06
Stored measured values
Depending on the trip cause, the following measured values are stored and shown on the
display:
Basic protective functions
Trip cause
Measured value
1
2
3
4
5
L: Long time LT
LT
I
L1
I
L2
I
L3
I
LN
--
L: Long time LT, neutral conductor
LT
I
L1
I
L2
I
L3
I
LN
--
S: Short time ST
ST
I
L1
I
L2
I
L3
I
LN
--
S: Directional short time dST forward
dST forward
I
L1
I
L2
I
L3
I
LN
--
S: Directional short time dST reverse
dST reverse
I
L1
I
L2
I
L3
I
LN
--
I: Instantaneous INST
INST
I
L1
I
L2
I
L3
I
LN
--
G: Ground fault GF Residual
GF residual
I
L1
I
L2
I
L3
I
LN
I
g
G: Ground fault GF Direct
GF direct
I
L1
I
L2
I
L3
I
LN
I
g
G: Ground fault GF Dual UREF
GF UREF
I
L1
I
L2
I
L3
I
LN
I
g
G: Ground fault GF Hi-Z UREF
GF UREF
I
L1
I
L2
I
L3
I
LN
I
g
Reverse power RP
Reverse power
P
L1
P
L2
P
L3
--
--
Enhanced protective functions EPF
Trip cause
Measured value
1
2
3
4
5
Unbalance
Current
Unbalance voltage
I
L1
I
L2
I
L3
I
LN
I
nb
Voltage
Unbalance current
U
1N
U
2N
U
3N
U
nb
--
Harmonic analysis
THD current
Over THD current
I
L1
I
L2
I
L3
I
LN
THD I
THD voltage
Over THD voltage
U
1N
U
2N
U
3N
THD U
--
Voltage
Undervoltage
Undervoltage
U
1N
U
2N
U
3N
--
--
Overvoltage
Overvoltage
U
1N
U
2N
U
3N
--
--
Power
Power forward
Power forward
P
L1
P
L2
P
L3
--
--
Power reverse
Power reverse
P
L1
P
L2
P
L3
--
--
Frequency
Underfrequency
Underfrequency
U
1N
U
2N
U
3N
f
--
Overfrequency
Overfrequency
U
1N
U
2N
U
3N
f
--
Phase rotation
Phase rotation
Phase sequence=
{L1L2L3 , L3L2L1}
--
--