Parameter
Address
Default
Min
Max
Unit
Logic Diagram
Differential protec
‐
tion
DIFF: Enable PSx
072 152
073 152
074 152
075 152
0: No
[spacer]
This setting defines the parameter subset (setting group) in which differential
protection is enabled.
[spacer]
DIFF: Vec.gr. ends a-b PSx
019 010
019 040
019 041
019 042
0
0
11
[spacer]
For standard connection of the P631 (see Chapter “Installation and
Connection”), the vector group ID needs to be entered. For connection reversal
applied to one individual end, this can be taken into account in setting
(MAIN: Conn.meas.circ. IP,a or MAIN: Conn.meas.circ. IP,b).
The following algorithms apply:
Setting = ID + 6
If the addition results in a value > 12 then:
Setting = (ID + 6) – 12
If the phase currents of the low and high voltage sides are exchanged and if this
is not accounted for by the settings at MAIN: Conn.meas,circ. IP,z
(where z is end a,b,c or d) and MAIN: Conn.meas,circ. IY,z (where z is
end a,b or c) then the algorithm is:
Setting = 12 – ID
If an A-C-B phase sequence (or "anti-clockwise rotating field") is present then
this should be entered as a setting at the P631. In this case, the P631 will
automatically form the complementary value of the set vector group ID to the
number 12 (vector group ID = 12 – set ID).
For application of the P631 as machine protection, the setting must be 0 or 6
depending on the current transformer connection.
[spacer]
DIFF: Idiff> PSx
072 142
073 142
074 142
075 142
0.20
0.10
2.50
Iref
[spacer]
Operate value of the differential protection function as referred to the reference
current of the relevant transformer end.
[spacer]
DIFF: Idiff>> PSx
072 143
073 143
074 143
075 143
15.0
2.5
30.0
Iref
[spacer]
Threshold value of the differential current for deactivation of the inrush
stabilization function (harmonic restraint) and of the overfluxing restraint.
Note: If the threshold is set too high, it is possible for the P631 not to trip in the
presence of internal faults with transformer saturation.
7 Settings
P631
P631/EN M/R-11-C // P631-310-650
7-105
Summary of Contents for P631
Page 2: ......
Page 4: ......
Page 7: ...Changes after going to press...
Page 8: ......
Page 16: ...P631 Table of Contents 8 P631 EN M R 11 C P631 310 650...
Page 56: ...P631 2 Technical Data 2 28 P631 EN M R 11 C P631 310 650...
Page 236: ...P631 3 Operation 3 180 P631 EN M R 11 C P631 310 650...
Page 246: ...P631 4 Design 4 10 P631 EN M R 11 C P631 310 650...
Page 266: ...P631 5 Installation and Connection 5 20 P631 EN M R 11 C P631 310 650...
Page 276: ...6 8 Configurable Function Keys P631 6 Local Control HMI 6 10 P631 EN M R 11 C P631 310 650...
Page 548: ...P631 10 Commissioning 10 10 P631 EN M R 11 C P631 310 650...
Page 568: ...P631 12 Maintenance 12 8 P631 EN M R 11 C P631 310 650...
Page 570: ...P631 13 Storage 13 2 P631 EN M R 11 C P631 310 650...
Page 572: ...P631 14 Accessories and Spare Parts 14 2 P631 EN M R 11 C P631 310 650...
Page 576: ...P631 15 Order Information 15 4 P631 EN M R 11 C P631 310 650...
Page 582: ...P631 A2 Internal Signals A2 4 P631 EN M R 11 C P631 310 650...
Page 608: ...P631 A4 Telecontrol Interfaces A4 18 P631 EN M R 11 C P631 310 650...
Page 637: ......