GE Multilin
T60 Transformer Protection System
5-267
5 SETTINGS
5.6 GROUPED ELEMENTS
5
The volts/hertz inverse A curves are shown below.
Figure 5–131: VOLTS-PER-HERTZ CURVES, INVERSE CURVE A
INVERSE CURVE B:
The curve for the Volts/Hertz Inverse Curve B shape is derived from the formula:
(EQ 5.47)
where:
T
= Operating Time
TDM
= Time Delay Multiplier (delay in sec.)
V
= fundamental RMS value of voltage (pu)
F
= frequency of voltage signal (pu)
Pickup
= volts-per-hertz pickup setpoint (pu)
The volts/hertz inverse B curves are shown below.
Figure 5–132: VOLTS-PER-HERTZ CURVES, INVERSE CURVE B
Multiples of volts per hertz pickup
T
ime
to
trip
(i
n
seconds)
Time
delay
setting
830738A1.CDR
T
TDM
V
F
----
Pickup
⁄
1
–
----------------------------------------------
when
V
F
----
Pickup
>
=
T
ime
to
trip
(i
n
seconds)
Multiples of volts per hertz pickup
830739A1.CDR
Time
delay
setting
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 ...