KYORITSU 6050 - Manual (Page 25)

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6.2.3 Testing
(1) Press the TEST BUTTON
Operating time of RCD is displayed on LCD. At Auto Ramp,
operating current value of RCD will be displayed.
● × 1/2.................The Breaker should not trip.
● × 1.....................The Breaker should trip.
● × 5.....................The Breaker should trip.
● DC..................... The breaker should trip.
● Auto Ramp( ).. The Breaker should trip. Check Trip Out Current.
(2) Press the 0°/180°switch to change the phase and repeat step(1).
(3) Change the phase again and repeat step (1).
● Be sure to return the tested RCD to the original condition after the
test.
MAKE SURE TO KEEP CLEAR OF EARTHED METAL DURING THE
OPERATION OF THESE TESTS.
Note:
● If the RCD does not trip, the tester will supply the test current for a
maximum of 1000ms on the X1/2 and X1 ranges. The fact that the
RCD has not tripped will be evident because the P- N and P- E LEDs
will still be on.
● If "I⊿n" setting is grater than the rated residual current of RCD, RCD
will trip and "no" may be displayed on LCD.
● If a voltage exists between the protective conductor and earth, it may
influence the measurements.
● If a voltage exists between neutral and earth, it may influence the
measurements, therefore, the connection between neutral point of
the distribution system and earth should be checked before testing.
● If leakage currents flow in the circuit following the RCD, it may
influence the measurements.
● The potential fields of other earthing installations may influence the
measurement.
● Special conditions of RCDs of a particular design, for example S-
type, shall be taken into consideration.
# CAUTION
● When the Uc voltage rises to UL value or greater, the
measurement is automatically suspended and "UcH" is
displayed on the LCD.