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10-16
Technical Data
857-UM001A-EN-P – July 2009
Power Protection
Table 10.36 – Reverse power and under-power stages P<, P<< (32)
Pick-up setting range
Definite time function:
- Operating time
Start time
Reset time
Reset ratio
Inaccuracy:
- Starting
- Operating time at definite time function
NOTE: When pick-up setting is +1 ... +200% an internal block will
be activated if max. voltage of all phases drops below 5% of rated.
Synchrocheck Function
Table 10.37 – Synchrocheck Function
Sync mode
Voltage check mode
CB closing time
U
limit setting
dead
U
limit setting
live
Frequency difference
Voltage difference
Phase angle difference
Request timeout
Frequency measuring range
Reset ratio (U)
Inaccuracy:
- voltage
- frequency
- phase angle
- operating time
200.0 ... +200.0 %Pm
0.3 – 300.0 s
Typically 200 ms
<500 ms
1.05
±3 % of set value or ±0.5 % of rated value
±1 % or ±150 ms
Off; ASync; Sync;
DD;DL;LD;DD/DL;DD/LD;DL/LD;DD/DL/LD
0.04 – 0.6 s
10 – 120 % U
n
10 – 120 % U
n
0.01 – 1.00 Hz
1 – 60 % U
n
2 – 90 deg
0.1 – 600.0 s
46.0 - 70.0 Hz
0.97
±3 % U
n
±20 mHz
±2 deg
±1% or ±30 ms
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