User Manual

DIR 1000587R0002 (L3821)
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1.2 Abbreviations and notes
1.2.1 Abbreviations
Abbreviations Meaning
Battery Power supply unit
BA Opening coil
BC Closing coil
CB Circuit Breaker
CS Current Sensor (current transformer)
Dialog Communication module
HW Hardware
In Rated current of the Rating Plug installed in the circuit breaker
LSIG Protection relay for CB 140G-N/140G-NS/140G-R
LSIG-MM Protection relay for CB 140G-N/140G-NS
MT Thermal memory
Relay also called "protection unit" or "protection release"
RMS Root mean square value
TC Trip Coil (opening solenoid)
SW Software
i-Test "Info/test" button on the front of the relay
Trip CB opening, generated by the release
Vaux Auxiliary power supply
1.2.2 Notes
A. Use the "Belden 3105A"- type two-wire cable for instance (not supplied by AB).
B. Use the "Belden 3106A"- type three-wire cable for instance (not supplied by AB).
C. Theunithasa"backup-protection"function;iftherstcommandtotheopeningsolenoiddoesnotimmediatelyopenthecircuit-breaker(TC
partiallyfaulty),TRIPcommandsarerepeatedlysentuntilthecircuit-breakeropens(providingaVauxistted)orthecurrentdisappears(if
self-powered).The"backup"conditioncanbesignalledbyconguringtheunitrelays;usingthe"YOback"selection,itispossibletocommand
the"openingcoil(YO)"accessoryasanotheropeningdevicewhenTCdoesnotwork.
1.2.3 Compatibility between CB and relay
Thistablesummarizesallpossiblettingoftherelaysand140Gcircuitbreakers.
CB\Relay LSIG LSIG-MM
140G/N/140G-NS x x
140G-R x x