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5.4 Fault type and phase
Bit
Range
Value
Meaning
0~7
0~4
0=Phase A
1=Phase B
2= Phase C
3=N-phase
4= N/A
Fault phase
0,1
When fault type =18:
0=DI1
1=DI2
8 ~ 15
0~2
See below table
Fault type
Note:
When the fault type is "DI status change tripping".
Fault type table
Fault code No.
Fault type description
0
No fault
1
Phase sequence fault
2
Under frequency fault
3
Over frequency fault
4
Under voltage fault
5
Over voltage fault
6
Voltage imbalance fault
7
Overload fault
8
Short circuit short delay inverse time fault
9
Short circuit short delay fi xed time fault
10
Short circuit instantaneous fault
11
MCR action
12
HSISC action (over-limit trip)
13
Ground fault
14
Residual current fault trip
15
Current imbalance fault
16
Maximum demand overfl ow
17
Reverse power fault
18
DI status change trip
19
Ground zone interlocking trip
20
Short circuit zone interlocking trip
21
Test overload fault
22
Test short circuit short delay inverse time fault
23
Test short circuit short delay fi xed time fault
24
Test short circuit Instantaneous fault
25
Test MCR action
26
Test HSISC action (over-limit trip)
27
Test ground fault
28
Test residual current fault
Instruction Leafl et
Effective September 2022
IZM6 Series Air Circuit Breaker
Operating Instruction Leafl et
