List of abbreviations
C.1 Table of abbreviations
3VA molded case circuit breakers with UL and IEC certification
470 Manual, 01/2019, L1V30435333-01
HH-fuse High-voltage fuses
HID High-intensity discharge
I Instantaneous (short-circuit protection)
I Isolated
I- / O- Input / Output
IEC International Electrotechnical Commission
INST [tripping
characteristic]
INST [tripping characteristic]
INSTA Final distribution area
IP International Protection
IT Injection Tester
IT Isolated ground, French: "Isolé Terre"
L Long-time delay (overload protection)
L Overload protection
LBS Load Break Switch (switch disconnector)
LCS Leading changeover switch
LI Overload protection (L) and instantaneous short-circuit protection (I)
LIG Overload protection (L), instantaneous short-circuit protection (I) and ground-
fault protection (G)
LIN Overload protection (L), instantaneous short-circuit protection (I) and neutral-
conductor protection (N)
LSI Overload protection (L), short-time delayed short-circuit protection (S) and
instantaneous short-circuit protection (I)
LSIN Overload protection (L), short-time delayed short-circuit protection (S), instan-
taneous short-circuit protection (I) and neutral-conductor protection (N)
LSING Overload protection (L), short-time delayed short-circuit protection (S), instan-
taneous short-circuit protection (I) and ground-fault protection (N)
LT [tripping
characteristic]
Partial overload range of the characteristic curve of a switching device
MCCB Molded case circuit breaker
MCP Motor circuit protector
MCS Molded case switch
MMB Maintenance mode box
MO Motor operator
N Neutral conductor
NC Normally closed contact
NEMA National Electrical Manufacturers Association
NFPA National Fire Protection Association.
NO Normally open contact
LV Low voltage
LV fuse Low-voltage fuse
PAC Power Analysis & Control
PI Plug-in (unit)
R RESET
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