Table 151. Underpower Factor Protection (Mpupf); Table 152. Underpower Factor Protection (Mpupf) Main Settings - ABB REX640 Product Manual

REX640
Product version: 1
Table 150. Stabilized and instantaneous differential protection for machines (MPDIF) main settings
Parameter
Low operate value
High operate value
Slope section 2
End section 1
End section 2
DC restrain enable
CT connection type
CT ratio Cor Line
CT ratio Cor Neut

Table 151. Underpower factor protection (MPUPF)

Characteristic
Operation accuracy
Operate time accuracy
Suppression of harmonics
Reset time

Table 152. Underpower factor protection (MPUPF) main settings

Parameter
Min operate current
Min operate voltage
Disable time
Voltage reversal
Table 153. Stabilized and instantaneous differential protection for two- or three-winding transformers (TR3PTDF)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Suppression of harmonics
1) Current before fault = 0.0 × I , f = 50 Hz. Injected differential current = 2.0 × set operation value.
n n
2) Measured with static power output (SPO)
76
Function
MPDIF
MPDIF
MPDIF
MPDIF
MPDIF
MPDIF
MPDIF
MPDIF
MPDIF
Function
MPUPF
MPUPF
MPUPF
MPUPF
Low stage
High stage
Value (Range)
5...30 %Ir
100...1000 %Ir
10...50%
0...100 %Ir
100...300 %Ir
0 = False
1 = True
1 = Type 1
2 = Type 2
0.40...4.00
0.40...4.00
Value
Dependent on the frequency of the current measured: f
±0.018 for power factor
±(1.0% or 30 ms)
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5, 6, 7
n
<40 ms
Value (Range)
0.05...0.65 × I
n
0.05...0.50 × U
n
0...60000 ms
0 = No
1 = Yes
Value
Depending on the frequency of the measured current: f
±3.0% of the set value or ±0.002 × I
Minimum Typical
30 ms 35 ms
17 ms 18 ms
Typically 40 ms
Typically 0.96
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5...
n
1MRS759144 A
Step
1
10
1
1
1
-
-
0.01
0.01
±2 Hz
n
Step
0.01
0.01
1
-
±2 Hz
n
n
Maximum
40 ms
20 ms
ABB