Operation Principle - ABB RED650 Technical Manual

1MRK 505 394-UEN A
18.5.6
Line differential protection RED650 2.2 IEC
Technical manual
Name Type
OperatorBlocked BOOLEAN
Oscillatory BOOLEAN
OutOfRange BOOLEAN
Overflow BOOLEAN
Source BOOLEAN
Test BOOLEAN
Validity INTEGER

Operation principle

The merging units (MUs) are situated close to the primary equipment, like circuit
breakers, isolators, etc. The MUs have the capability to gather measured values
from measuring transformers, non-conventional transducers or both. The gathered
data are then transmitted to subscribers over the process bus, utilizing the
IEC/UCA 61850-9-2LE protocol.
The IED communicates with the MUs over the process bus via the rear access
points. For the user, the MU appears in the IED as a normal analogue input module
and is engineered in the very same way.
Station communication
Values (Range) Unit
1=Yes -
0=No
1=Yes -
0=No
1=Yes -
0=No
1=Yes -
0=No
0=Process -
1=Substituted
1=Yes -
0=No
0=Good -
2=Reserved
1=Invalid
3=Questionable
Section 18
Description
OperatorBlocked
indication output for U4
Oscillatory indication
output for U4
OutOfRange indication
output for U4
Overflow indication
output for U4
Source indication output
for U4
Test indication output for
U4
Validity indication output
U4
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