Table 67. Underfrequency protection (DAPTUF) main settings
Parameter
Function
Value (Range)
Step
Start value
DAPTUF
35.0...64.0 Hz
0.1
Operate delay time
DAPTUF
0.170...60.000 s
0.001
Table 68. Overexcitation protection (OEPVPH)
Characteristic
Value
Operation accuracy
Depending on the frequency of the voltage measured: fn ±2
Hz
±2.5% of the set value or 0.01 x Ub/f
Start time
1)2)
Frequency change
Typical 200 ms (±20 ms)
Voltage change
Typical 100 ms (±20 ms)
Reset time
< 60 ms
Reset ratio
Typical 0.96
Retardation time
< 45 ms
Operate time accuracy in
definite-time mode
±1.0% of the set value or ±20 ms
Operate time accuracy in
inverse-time mode
±5.0% of the theoretical value or ±50 ms
1) Results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 69. Overexcitation protection (OEPVPH) main settings
Parameter
Function
Values (Range)
Step
Leakage React
OEPVPH
0.0 - 50.0
0.1
Start value
OEPVPH
100 - 200
1
Time multiplier
OEPVPH
0.1 - 100.0
0.1
Operating curve type
OEPVPH
ANSI Def. Time
IEC Def. Time
OvExt IDMT Crv1
OvExt IDMT Crv2
OvExt IDMT Crv3
OvExt IDMT Crv4
-
Operate delay time
OEPVPH
0.10 - 200.00
0.01
Transformer Protection and Control
1MRS756978 D
RET630
Product version: 1.1
Issued: 2011-05-18
50
ABB
Содержание Relion 630 Series RET630
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