5-284
T60 Transformer Protection System
GE Multilin
5.7 CONTROL ELEMENTS
5 SETTINGS
5
(EQ 5.49)
where:
ΔΦ
= phase angle difference in degrees;
Δ
F = frequency difference in Hz.
If one or both sources are de-energized, the synchrocheck programming can allow for closing of the circuit breaker using
undervoltage control to by-pass the synchrocheck measurements (dead source function).
•
SYNCHK1 V1 SOURCE
: This setting selects the source for voltage V1 (see NOTES below).
•
SYNCHK1 V2 SOURCE
: This setting selects the source for voltage V2, which must not be the same as used for the
V1 (see NOTES below).
•
SYNCHK1 MAX VOLT DIFF
: This setting selects the maximum primary voltage difference in volts between the two
sources. A primary voltage magnitude difference between the two input voltages below this value is within the permis-
sible limit for synchronism.
•
SYNCHK1 MAX ANGLE DIFF:
This setting selects the maximum angular difference in degrees between the two
sources. An angular difference between the two input voltage phasors below this value is within the permissible limit
for synchronism.
•
SYNCHK1 MAX FREQ DIFF:
This setting selects the maximum frequency difference in ‘Hz’ between the two sources.
A frequency difference between the two input voltage systems below this value is within the permissible limit for syn-
chronism.
•
SYNCHK1 MAX FREQ HYSTERESIS
: This setting specifies the required hysteresis for the maximum frequency differ-
ence condition. The condition becomes satisfied when the frequency difference becomes lower than
SYNCHK1 MAX
FREQ DIFF
. Once the Synchrocheck element has operated, the frequency difference must increase above the
SYNCHK1
MAX FREQ DIFF
+
SYNCHK1 MAX FREQ HYSTERESIS
sum to drop out (assuming the other two conditions, voltage and
angle, remain satisfied).
•
SYNCHK1 DEAD SOURCE SELECT:
This setting selects the combination of dead and live sources that will by-pass
synchronism check function and permit the breaker to be closed when one or both of the two voltages (V1 or/and V2)
are below the maximum voltage threshold. A dead or live source is declared by monitoring the voltage level. Six
options are available:
None:
Dead Source function is disabled
LV1 and DV2:
Live V1 and Dead V2
DV1 and LV2:
Dead V1 and Live V2
DV1 or DV2:
Dead V1 or Dead V2
DV1 Xor DV2:
Dead V1 exclusive-or Dead V2 (one source is Dead and the other is Live)
DV1 and DV2:
Dead V1 and Dead V2
•
SYNCHK1 DEAD V1 MAX VOLT:
This setting establishes a maximum voltage magnitude for V1 in 1 ‘pu’. Below this
magnitude, the V1 voltage input used for synchrocheck will be considered “Dead” or de-energized.
•
SYNCHK1 DEAD V2 MAX VOLT
: This setting establishes a maximum voltage magnitude for V2 in ‘pu’. Below this
magnitude, the V2 voltage input used for synchrocheck will be considered “Dead” or de-energized.
•
SYNCHK1 LIVE V1 MIN VOLT
: This setting establishes a minimum voltage magnitude for V1 in ‘pu’. Above this mag-
nitude, the V1 voltage input used for synchrocheck will be considered “Live” or energized.
•
SYNCHK1 LIVE V2 MIN VOLT
: This setting establishes a minimum voltage magnitude for V2 in ‘pu’. Above this mag-
nitude, the V2 voltage input used for synchrocheck will be considered “Live” or energized.
T
1
360
°
2
ΔΦ
×
------------------
Δ
F
×
--------------------------------
=
Summary of Contents for T60
Page 6: ...vi T60 Transformer Protection System GE Multilin TABLE OF CONTENTS ...
Page 14: ...xiv T60 Transformer Protection System GE Multilin TABLE OF CONTENTS ...
Page 34: ...1 20 T60 Transformer Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 490: ...5 344 T60 Transformer Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 522: ...6 32 T60 Transformer Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Page 536: ...7 14 T60 Transformer Protection System GE Multilin 7 1 COMMANDS 7 COMMANDS AND TARGETS 7 ...
Page 568: ...10 12 T60 Transformer Protection System GE Multilin 10 6 DISPOSAL 10 MAINTENANCE 10 ...
Page 596: ...A 28 T60 Transformer Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 716: ...B 120 T60 Transformer Protection System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Page 762: ...E 10 T60 Transformer Protection System GE Multilin E 1 IEC 60870 5 104 PROTOCOL APPENDIX E E ...
Page 774: ...F 12 T60 Transformer Protection System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...