KYORITSU 5406A - RCD Test on OLD TT SYSTEM

 15 
5.2 RCD test ON "OLD TT SYSTEM"
  CAUTION
M5406A can operate in OLD-TT system with the follwing I⊿n,
however, the accuracy is not assured. The instrument does not
operatewithotherI⊿n.
×1/2,×1,DC TEST, AUTO RAMP TEST…I⊿n:10mA, 20mA,
30mA,200mA,300mA
×5…I⊿n:10mA,20mA,30mA,200mA
OldTTsystemisaTTsystemwithphasetophasevoltageof220V(instead
of 400V) and phase to earth of 127V (instead of 230V) and normally the
neutralconductorisnotused.
Beforeconnectingthemodel5406Atothissystemcheckbyavoltmeter(or
aDMM)inordertobesurethatthevoltagebetweeneachphasetoearthis
127V(+/-10%).
  WARNING
Do not press the "Test button" if the voltmeter reads a value of
220V.
Connectingthemodel5406Atothissystem,allthreewiringcheckLEDsshouldbelit.
Fig.8
L1
L2
L3
PE
R
R
O
RCD
220V
220V
220V