2 Functions
45
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Figure 2-2
Polarity of current transformers
Voltage Connection
Address
213
specifies how the voltage transformers are connected.
VT Connect.
3ph
=
Van, Vbn, Vcn
means that three phase voltages in wye-connection are con-
nected,
VT Connect. 3ph
=
Vab, Vbc, VGnd
signifies that two phase-to-phase
voltages (V-connection) and V
N
are connected. The latter setting is also selected when
only two phase-to-phase voltage transformers are utilized or when only the displaced
voltage (zero sequence voltage) is connected to the device.
Device 7SJ64 contains 4 voltage measuring inputs which enable further options
besides the above-mentioned connection types:
VT Connect. 3ph
=
Van,Vbn,Vcn,VGn
is selected if the three phase voltages in wye-connection and V
N
are connected to the fourth voltage input of the device. Select
VT Connect. 3ph
=
Van,Vbn,Vcn,VSy
in case the fourth voltage input is used for the synchronizing
function even if two phase-to-phase voltages (V-connection) are available on the
primary side (since the voltages are connected to the device such that the device mea-
sures phase-ground voltages under symmetrical conditions).
Note
If the synchronization function is used for the connection to two-phase-to-phase volt-
ages in V-connection (see above), the device cannot determine a zero sequence volt-
age. The function „Directional Time Overcurrent Ground Protection“, „Directional
Ground Fault Detection“ and „Fuse-Failure-Monitor (FFM)“ must be disabled.
Parameter
240
VT Connect. 1ph
is set to specify that only
one
voltage transformer
is connected to the devices. In this case the user defines which primary voltage is con-
nected to which analog input. If one of the available voltages is selected, i.e. a setting
unequal
NO
, setting of address
213
is no more relevant. Only address
240
is to be set.
If parameter
240
VT Connect. 1ph
is set to
NO
on the other hand, parameter
213
will apply.
With 7SJ64 and single-phase voltage transformer connection the voltage connected
to voltage input V
4
is always interpreted as the voltage which is to be synchronized.
Содержание siprotec SJ62
Страница 3: ...3 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 9: ...Preface 9 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 21: ...Contents 19 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 35: ...1 Introduction 33 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 365: ...2 Functions 363 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 443: ...3 Mounting and Commissioning 441 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 529: ...4 Technical Data 527 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 699: ...A Appendix 697 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 701: ...Literature 699 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 714: ...Index 712 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 715: ...Index 713 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...