Bit 7 6 5 4 3 2 1 0
Not used Not used Ground
fault phase
3
Ground
fault phase
2
Ground
fault phase
1
Ground
fault direc-
tion B
Ground
fault direc-
tion A
Ground
fault
general
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
Format 16-bit unsigned integer
Unit –
Range 0 to 65535
The following criteria explains the bit information of a ground-fault status registers:
•
If the ground fault is detected, then the ground-fault general is set to 1.
•
If the ground fault is detected in forward direction, then the ground fault direction A is set to 1.
•
If the ground fault is detected in reverse direction, then the ground fault direction B is set to 1.
•
If the ground fault is detected in an undetermined direction, then the ground fault direction A and B are
set to 1.
•
If the 1-phase-to-ground fault at phase 1 is detected, then the ground fault phase 1 is set to 1.
•
If the 1-phase-to-ground fault at phase 2 is detected, then the ground fault phase 2 is set to 1.
•
If the 1-phase-to-ground fault at phase 3 is detected, then the ground fault phase 3 is set to 1.
NOTE
The ground-fault status register shows an actual status only if the ground-type connection is isolated/reso-
nant and if the ground-current acquisition is measured.
Phase Current I
1
(Address 1058) This register contains the phase current I
1
.
Bit
15 14 13 12 11 10 9 8
2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
Bit 7 6 5 4 3 2 1 0
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
Format 16-bit unsigned integer
Unit 1/10 A
Range 0 to 65535
Phase Current I
2
(Address 1059) This register contains the phase current I
2
.
Refer to Phase Current I
1
, Page 142.
Phase Current I
3
(Address 1060) This register contains the phase current I
3
.
Refer to Phase Current I
1
, Page 142.
Ground Current I
N
(Address 1061) This register contains the actual ground-current value I
N
.
Modbus Registers
B.5 Register-Type Data – Input Registers
142 SICAM, Feeder Condition Monitor, Manual
E50417-H8940-C580-A4, Edition 03.2019
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