Q6Z0102A
Parameter
set 1
set 2
set 3
set 4
DIFF:
Enable PSx
072 152
073 152
074 152
075 152
DIFF:
Enabled
[ 041 210 ]
DIFF:
Enable PSx
[ * ]
1
0
0: No
1: Yes
0
0: No
1: Yes
DIFF:
General enable USER
[ 019 080 ]
1
Fig. 3-77: Enabling or disabling differential protection
3.21.2
Amplitude Matching
In order to set the amplitude matching for the protected object, a reference
power - identical for all windings - needs to be defined. For two-winding
arrangements, the nominal power will usually be the reference power. The
individual reference currents for each winding of the protected object are then
calculated by the P631 on the basis of the set reference power and the set
primary nominal voltages of the transformer.
I
ref
,
a
=
S
ref
3
⋅
V
nom
,
a
I
ref
,
b
=
S
ref
3
⋅
V
nom
,
b
S
ref
: reference power
I
ref
,
a
,
I
ref
,
b
: reference current of winding a or b, respectively
V
nom
,
a
,
V
nom
,
b
: nominal voltage of winding a or b, respectively
The P631 calculates the matching factors on the basis of the reference currents
and the set primary nominal currents of the system transformers.
k
am
,
a
=
I
nom
,
a
I
ref
,
a
k
am
,
b
=
I
nom
,
b
I
ref
,
b
with
k
am
,
a
,
k
am
,
b
: amplitude matching factor of end a or b, respectively
I
nom
,
a
,
I
nom
,
b
: primary nominal currents of the system transformers
Reference currents and matching factors are displayed at the P631.
P631
3 Operation
3-110
P631/EN M/R-11-C // P631-310-650
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: ......