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GMC-I Messtechnik GmbH 89
21.5 Lijst van de korte aanduidingen en hun betekenis
RCD-schakelaar (aardlekbeveiliging)
IΔAanspreekstroom
IΔN Nominale foutstroom
IFStijgende meetstroom (foutstroom)
PRCD Portable (mobiele) RCD
PRCD-S :
met aardleidingsherkenning resp. aardleidingsbewaking
PRCD-K:
met onderspanningsaanspreking en aardleidingsbewaking
RCD-
Selectieve RCD-aardlekschakelaar
REBerekende aardingsweerstand resp. Aardlusweerstand
SRCD Socket (vast geïnstalleerde) RCD
taAanspreektijd / uitschakeltijd
UIΔContactspanning op het tijdstip van de aanspreking
UIΔNContactspanning
met betrekking tot de nominale foutstroom I Δ N
ULGrenswaarde voor de contactsspanning
Overstroombeveiliging
IKBerekende kortsluitstroom (bij nominale spanning)
ZL-N Netimpedantie
ZL-PE Lusimpedantie
Aarding
RBWeerstand van de systeemaarde
REGemeten aardingsweerstand
RESchl Aardlusweerstand
Laagohmige weerstand van
Aardleidingen, aardgeleiders en potentiaalvereffeningsleidingen
RLO+ Weerstand van potentialvereffeningsleidingen (+ pool naar
PE)
RLO– Weerstand van potentiaalvereffeningsleidingen (– pool
naar PE)
Isolatie
RE(ISO) Aardlekweerstand (DIN 51953)
RISO Isolatieweerstand
RST Standplaatsisolatieweerstand
ZST Standplaatsisolatie-impedantie
Stroom
IAUitschakelstroom
ILLekstroom (meting met stroomtangtransformator)
IMMeetstroom
INNominale stroom
IPMeetstroom
Spanning
f Frequentie van de netspanning
fNNominale frequentie van de netspanning
ΔU Spanningsval in %
U op de meetpennen gemeten spanning tijdens na de isola-
tiemeting van RISO
UBatt Accuspanning (batterijspanning)
UEAardelektrodespanning
UISO Bij meting van RISO: Meetspanning, bij drempelfunctie:
Aanspreek- en doorslagspanning
UL-L Spanning tussen twee buitenste geleiders
UL-N Spanning tussen L en N
UL-PE Spanning tussen L en PE
UNNet-nominale spanning
U3~ hoogste gemeten spanning bij het bepalen
van de draaiveldrichting
US-PE Spanning tussen sonde en PE
UYLeidingspanning ten opzichte van aarde
S
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