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58 GMC-I Messtechnik GmbH
14.7
Intelligente drempel – functie ta+I
Δ
(alleen
PROFI
TEST
MXTRA
)
14.7.1 Gebruik
Het voordeel van deze meetfunctie tegenover de aparte metingen
van I
ΔN
en t
A
is dat de uitschakeltijd en de uitschakelstroom gelijk-
tijdig worden gemeten met trapsgewijs stijgende meetstroom
waarbij de RCD maar één keer moet worden aangesproken.
De intelligente drempel
wordt tussen de start-
waarde (35% I
ΔN
) en de
eindwaarde (130% I
ΔN
)
van de stroom onderver-
deeld in fases van tel-
kens 300 ms. Hieruit
resulteert een indeling
waarbij elke fase met
een constante meet-
stroom overeenkomt die
maximaal 300 ms lang
stroomt als er geen aan-
spreking plaats vindt.
Als resultaat wordt de
aanspreekstroom en
ook de aanspreektijd gemeten en in beeld gebracht.
Aansluiting
Parameter instellen
Meting van de contactspanning starten
Aanspreekmeting starten
De meetprocedure kan op elk gewenst moment voortijdig worden
afgebroken als u op de knop ON/START drukt.
Meetresultaat
Nominale foutstromen:
Type 1: RCD, SRCD, PRCD ...
Nominale stromen: 6 ... 125 A
Type 2: AC , A/F , B *
* Typ B = alstroomgevoelig
10 ... 500 mA
Contactspanning:
< 25 V, < 50 V, < 65 V
58


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