Supervision and monitoring functions
Table 98. Runtime counter for machines and devices (MDSOPT)
Characteristic Value
Motor run-time measurement accuracy
1)
±0.5%
1) Of the reading, for a stand-alone protection relay without time synchronization
Table 99. Runtime counter for machines and devices (MDSOPT) main settings
Parameter Function Value (Range) Step
Warning value MDSOPT 0...299999 h 1
Alarm value MDSOPT 0...299999 h 1
Initial value MDSOPT 0...299999 h 1
Operating time hour MDSOPT 0...23 h 1
Operating time mode MDSOPT Immediate
Timed Warn
Timed Warn Alm
-
Table 100. Circuit breaker condition monitoring (SSCBR)
Characteristic
Value
Current measuring accuracy At the frequency f = f
n
±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
Traveling time measurement ±10 ms
Table 101. Fuse failure supervision (SEQRFUF)
Characteristic
Value
Operation accuracy At the frequency f = f
n
Current: ±1.5% of the set value or ±0.002 × I
n
Voltage: ±1.5% of the set value or ±0.002 × U
n
Operate time
1)
• NPS function U
Fault
= 1.1 × set
Neg Seq voltage
Lev
U
Fault
= 5.0 × set
Neg Seq voltage
Lev
Typically 35 ms (±15 ms)
Typically 25 ms (±15 ms)
• Delta function ΔU = 1.1 × set
Voltage change rate
ΔU = 2.0 × set
Voltage change rate
Typically 35 ms (±15 ms)
Typically 28 ms (±15 ms)
1) Includes the delay of the signal output contact, f
n
= 50 Hz, fault voltage with nominal frequency injected from random phase angle
Table 102. Current circuit supervision (CCRDIF)
Characteristic
Value
Operate time
1)
<30 ms
1) Including the delay of the output contact
Generator Protection and Control
1MRS757583 C
Product version: 1.3
ABB 49
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