ABB Relion SMU615, Product Manual, Page: 18 / 32

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