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P72x/EN CT/A11
Communication database
Page 24/78
MiCOM P721/P723
3.11.1
Meaning of each value channel
•
IA, IB, IC and I
O
channels:
The value is an signed 16 bits word equivalent to the ADC value
3.11.2
Calculation formula for phase current values
Line phase current value (primary value) = phase sampled value x phase primary CT / phase
internal CT ratio (mapping address 0007 = 800) x
√
2
3.11.3
Calculation formula for earth current values
Line earth current value (primary value) = earth sampled value (e.g. word 10 or 14) x earth
primary CT / earth internal CT ratio (mapping address 0008h) x
√
2
3.11.4 Logic
channels
Logic channel
MODBUS & DNP 3.0
IEC 61870-5-103
Bit 0
Trip relay (RL1)
Earth Starting
Bit 1
Output relay 2
General Starting
Bit 2
Output relay 3
CB Fail
Bit 3
Output relay 4
General Trip
Bit 4
Watch-dog relay
[95] tSUP
Bit 5
Output relay 5
[87] tDIFF
Bit 6
Output relay 6
Reserved
Bit 7
Output relay 7
[95N] tSUP
Bit 8
Output relay 8
[87N] tDIFF
Bit 9
Reserved
Reserved
Bit 10
Logic input 1
Logic input 1
Bit 11
Logic input 2
Logic input 2
Bit 12
Logic input 3
Logic input 3
Bit 13
Logic input 4
Logic input 4
Bit 14
Logic input 5
Logic input 5
Bit 15
Reserved
Reserved
3.12
Page 22h – Disturbance record index frame
Disturbance record index frame (7 to 9 Words)
Access in word reading (
function 03
)
Addresses
Contents
2200h
Disturbance data index frame
Disturbance record index frame
Word
Contents
n° 1
Disturbance record number
n° 2
Disturbance record finish date (second)
n° 3
Disturbance record finish date (second)
n° 4
Disturbance record finish date (millisecond)
n° 5
Disturbance record finish date (millisecond)
n° 6
Disturbance record starting condition:
1: tripping command (RL1)
2: instantaneous
3: remote command
4: logic input
n° 7
Frequency at the post-time beginning
n° 8
(=0) Optional
n° 9
(=0) Optional
Содержание P721
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