VAMP 259 - Synchrocheck Function; Second Harmonic Function; Circuit-Breaker Failure Protection

9.3 Protection stages
9 Technical data
Technical description
290
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VM259.EN007
9.3.6. Synchrocheck function
Sync mode
Off; ASync; Sync;
Voltage check mode
DD;DL;LD;DD/DL;DD/LD;DL/LD;DD/DL/LD
CB closing time
0.04 – 0.6 s
U
dead
limit setting
10 – 120 % U
n
U
live
limit setting
10 – 120 % U
n
Frequency difference
0.01 – 1.00 Hz
Voltage difference
1 – 60 % U
n
Phase angle difference
2 – 90 deg
Request timeout
0.1 – 600.0 s
Stage operation range
46.0 - 64.0 Hz
Reset ratio (U)
0.97
Inaccuracy:
- voltage
±3 % U
n
- frequency
±20 mHz
- phase angle
±2when Δf < 0.2 Hz, else ±5
- operating time
±1% or ±30 ms
NOTE! When “sync” mode is used, Δf should be less < 0.2 Hz.
9.3.7. Second harmonic function
2. Harmonic stage (51F2)
Settings:
- Setting range 2.Harmonic
10 – 100 %
- Operating time
0.05 – 300.00 s (step 0.01 s)
Inaccuracy:
- Starting
±1%- unit
NOTE! The amplitude of second harmonic content has to be at least 2% of the
nominal of CT. If the moninal current is 5 A, the 100 Hz component needs
to exceed 100 mA.
9.3.8. Circuit-breaker failure protection
Circuit-breaker failure protection CBFP (50BF)
Relay to be supervised
T1-T14 (depending the ordering code)
Definite time function
- Operating time
0.1** – 10.0 s (step 0.1 s)
Reset time
<95 ms
Inaccuracy
- Operating time
±20 ms
**) This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.