5-284
L60 Line Phase Comparison System
GE Multilin
5.6 CONTROL ELEMENTS
5 SETTINGS
5
•
E
n
is the accumulated energy at index
n
•
E
n
– 1
is the accumulated energy at index
n
– 1
The thermal overload protection element removes the
THERMAL PROT 1 OP
output operand when
E
< 0.05. In case of
emergency, the thermal memory and
THERMAL PROT 1 OP
output operand can be reset using
THERM PROT 1 RESET
setting.
All calculations are performed per phase. If the accumulated energy reaches value 1 in any phase, the thermal overload
protection element operates and only resets when energy is less than 0.05 in all three phases.
The logic for the thermal overload protection element is shown below.
Figure 5–142: THERMAL OVERLOAD PROTECTION SCHEME LOGIC
Table 5–34: TYPICAL TIME CONSTANTS
PROTECTED EQUIPMENT
TIME CONSTANT
MINIMUM RESET TIME
Capacitor bank
10 minutes
30 minutes
Overhead line
10 minutes
20 minutes
Air-core reactor
40 minutes
30 minutes
Busbar
60 minutes
20 minutes
Underground cable
20 to 60 minutes
60 minutes
SETTINGS
Enabled = 1
Function
Off = 0
Block
AND
SETTING
IA RMS
Source
IB RMS
IC RMS
SETTINGS
IA > k × Ib
K Factor
IB > k × Ib
IC > k × Ic
Base Current
OR
AND
SETTING
Trip Time Constant
RUN
E > 0.1
SETTINGS
Reset Time Constant
RUN
E < 0.1
Minimum Reset Time
Reset E to 0
SETTING
Off = 0
Reset
Latch
S
R
Reset-dominant
FLEXLOGIC OPERAND
THERMAL PROT 1 OP
FLEXLOGIC OPERAND
THERMAL PROT 1 PKP
827013A1.CDR
Содержание L60
Страница 10: ...x L60 Line Phase Comparison System GE Multilin TABLE OF CONTENTS ...
Страница 57: ...GE Multilin L60 Line Phase Comparison System 2 27 2 PRODUCT DESCRIPTION 2 3 SPECIFICATIONS 2 ...
Страница 58: ...2 28 L60 Line Phase Comparison System GE Multilin 2 3 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Страница 100: ...3 42 L60 Line Phase Comparison System GE Multilin 3 3 DIRECT INPUT AND OUTPUT COMMUNICATIONS 3 HARDWARE 3 ...
Страница 482: ...6 26 L60 Line Phase Comparison System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Страница 554: ...10 8 L60 Line Phase Comparison System GE Multilin 10 2 BATTERIES 10 MAINTENANCE 10 ...
Страница 674: ...B 110 L60 Line Phase Comparison System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 704: ...C 30 L60 Line Phase Comparison System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 720: ...E 10 L60 Line Phase Comparison System GE Multilin E 1 PROTOCOL APPENDIX E E ...
Страница 732: ...F 12 L60 Line Phase Comparison System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...
Страница 742: ...H 8 L60 Line Phase Comparison System GE Multilin H 3 WARRANTY APPENDIX H H ...