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5-178
T60 Transformer Protection System
GE Multilin
5.6 GROUPED ELEMENTS
5 SETTINGS
5
c) INSTANTANEOUS DIFFERENTIAL
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
TRANSFORMER
INSTANTANEOUS DIFFERENTIAL
The instantaneous differential element acts as an instantaneous overcurrent element responding to the measured differen-
tial current magnitude (filtered fundamental frequency component) and applying a user-selectable pickup threshold. The
pickup threshold should be set greater than the maximum spurious differential current that could be encountered under
non-internal fault conditions (typically magnetizing inrush current or an external fault with extremely severe CT saturation).
Figure 5–91: INSTANTANEOUS DIFFERENTIAL SCHEME LOGIC
d) HOTTEST-SPOT TEMPERATURE
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
TRANSFORMER
HOTTEST-SPOT TEMPERATURE
The Hottest-Spot Temperature element provides a mechanism for detecting abnormal winding hottest-spot temperatures
inside the transformer. It can be set to alarm or trip in cases where the computed hottest-spot temperature is above the
pickup threshold for a user-specified time (considered as transformer overheating).
INSTANTANEOUS
DIFFERENTIAL
INST DIFFERENTIAL
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
INST DIFFERENTIAL
PICKUP: 8.000
pu
Range: 2.000 to 30.000 pu in steps of 0.001
MESSAGE
INST DIFF BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
INST DIFFERENTIAL
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
INST DIFFERENTIAL
EVENTS: Disabled
Range: Disabled, Enabled
HOTTEST-SPOT
TEMPERATURE
XFMR HST FUNCTION:
Disabled
Range: Disabled, Enabled
MESSAGE
XFMR HST PICKUP:
140°C
Range: 50 to 300°C in steps of 1
MESSAGE
XFMR HST DELAY:
1 min.
Range: 0 to 30000 min. in steps of 1
MESSAGE
XFMR HST BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
XFMR HST TARGET:
Self-Reset
Range: Self-reset, Latched, Disabled
SETTING
ACTUAL VALUE
SETTING
SETTING
FLEXLOGIC OPERAND
FLEXLOGIC OPERANDS
INST DIFFERENTIAL
FUNCTION:
DIFF PHASOR
INST DIFF BLOCK:
INST DIFFERENTIAL
PICKUP:
XFMR INST DIFF OP
XFMR INST DIFF OP C
XFMR INST DIFF OP B
XFMR INST DIFF OP A
Off=0
Enabled=1
Disabled=0
AND
828000A1.CDR
RUN
RUN
RUN
I
ad > PICKUP
I
ad
I
bd
I
cd
I
bd > PICKUP
I
cd > PICKUP
OR
Summary of Contents for UR T60
Page 10: ...x T60 Transformer Protection System GE Multilin TABLE OF CONTENTS ...
Page 14: ...xiv T60 Transformer Protection System GE Multilin 0 1 BATTERY DISPOSAL 0 BATTERY DISPOSAL 0 ...
Page 34: ...1 20 T60 Transformer Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 436: ...5 298 T60 Transformer Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 678: ...C 30 T60 Transformer Protection System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Page 688: ...D 10 T60 Transformer Protection System GE Multilin D 1 IEC 60870 5 104 PROTOCOL APPENDIX D D ...
Page 700: ...E 12 T60 Transformer Protection System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...