ABB Relion SMU615 Product Manual page 18

Substation Merging Unit
SMU615
Product version: 1.0
Condition monitoring and supervision functions
Table 26. Circuit-breaker condition monitoring (SSCBR)
Characteristic
Current measuring accuracy
Operate time accuracy
Travelling time measurement
Table 27. Current circuit supervision (CCSPVC)
Characteristic
1)
Operate time
1) Including the delay of the output contact
Table 28. Current circuit supervision (CCSPVC) main settings
Parameter
Start value
Max operate current
Table 29. Fuse failure supervision (SEQSPVC)
Characteristic
Operate time 1)
1) Includes the delay of the signal output contact, f
measurements
Table 30. Arc detection (ARCDSARC)
Characteristic
1)
Operate time
1) Includes the delay of the heavy-duty output contact
2) Normal power output
3) High-speed power output
18
Function
CCSPVC
CCSPVC
NPS function
Delta function
= 50 Hz, fault voltage with nominal frequency injected from random phase angle, results based on statistical distribution of 1000
n
Value
±1.5% or ±0.002 × I
n
(at currents in the range of 0.1...10 × I
±5.0%
(at currents in the range of 10...40 × I
±1.0% of the set value or ±20 ms
+10 ms / -0 ms
Value
<30 ms
Value (Range)
0.05...0.20 × I
n
1.00...5.00 × I
n
Value
U = 1.1 × set Neg Seq voltage
Fault
Lev
U = 5.0 × set Neg Seq voltage
Fault
Lev
ΔU = 1.1 × set Voltage change rate <30 ms
Voltage change rate <24 ms
ΔU = 2.0 × set
Value
Minimum
2)
9 ms
3)
4 ms
1MRS758420 B
)
n
)
n
Step
0.01
0.01
<33 ms
<18 ms
Typical Maximum
2)
10 ms 12 ms
3)
6 ms 7 ms
2)
3)
ABB