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MI 3125/3125B EurotestCOMBO Prüfen von RCDs
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RCD-Typ Berührungsspannung Uc
proportional zu Nennwert IN
AC G 1,05I
N beliebig
Beide Modelle
AC
S
21,05I
N
A G 1,41,05I
N 30 mA
A
S
21,41,05I
N
A G 21,05I
N < 30 mA
A
S
221,05I
N
B G 21,05I
N beliebig Nur Modell 3125B
B
S
221,05I
N
Tabelle 5.1: Beziehung zwischen Uc und I
N
Der Schleifenwiderstand ist ein Anhaltswert und wird aus dem Uc-Ergebnis (ohne
zusätzliche Proportionalitätsfaktoren) nach:
N
C
LI
U
R
berechnet.
GB-Version
Bild 5.18: Beispiel für die Ergebnisse einer Berührungsspannungsmessung
Angezeigte Ergebnisse:
Uc ........ Berührungsspannung.
Rl ......... Fehlerschleifenwiderstand.
5.4.2 Auslösezeit (RCDt)
Die Messung der Auslösezeit überprüft die Empfindlichkeit des RCDs bei
verschiedenen Fehlerströmen.
Messverfahren für die Auslösezeit
*Modell MI 3125B
Wählen Sie mit dem Funktionswahlschalter die Funktion RCD.
Setzen Sie die Unterfunktion auf RCDt.
Stellen Sie (bei Bedarf) die Prüfparameter ein.
Schließen Sie das Prüfkabel am Instrument an.
Schließen Sie die Prüfleitungen am Prüfling an (siehe Bild 5.17).
Drücken Sie die Taste TEST, um die Messung durchzuführen.
Speichern Sie das Ergebnis durch Drücken der Taste MEM (optional)*.
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