ABB Relion 650 series RET650 Product Manual page 59

ABB
Transformer protection RET650
Product version: 1.1
Frequency protection
Table 37. Under frequency protection SAPTUF
Function
Operate value, start function
Operate value, restore frequency
Operate time, start function
Reset time, start function
Operate time delay
Restore time delay
Table 38. Overfrequency protection SAPTOF
Function
Operate value, start function
Operate time, start function
Reset time, start function
Timer
Range or value
(35.00-75.00) Hz
(45 - 65) Hz
At 50 Hz: 200 ms typically at f
+0.5 Hz to f -0.5 Hz
set
At 60 Hz: 170 ms typically at f
+0.5 Hz to f -0.5 Hz
set
At 50 Hz: 60 ms typically at f
Hz to f +0.5 Hz
set
At 60 Hz: 50 ms typically at f
Hz to f +0.5 Hz
set
(0.000-60.000)s
(0.000-60.000)s
Range or value
(35.00-75.00) Hz
At 50 Hz: 200 ms typically at f
-0.5 Hz to f +0.5 Hz
set
At 60 Hz: 170 ms at f
set
f +0.5 Hz
set
At 50 and 60 Hz: 55 ms typically at
f +0.5 Hz to f -0.5 Hz
set set
(0.000-60.000)s
1MRK 504 127-BEN -
Issued: February 2011
Accuracy
± 2.0 mHz
± 2.0 mHz
-
set
set
-0.5 -
set
-0.5
set
<250 ms
<150 ms
Accuracy
± 2.0 mHz at
symmetrical
three-phase
voltage
-
set
-0.5 Hz to
-
<250 ms
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