10.2 Operating Instructions for RCD
10.2.1 Initial Checks: to be carried out before any testing;
1. Preparation
Always inspect your test instrument and lead accessories for abnormality or
damage:
If abnormal conditions exist DO NOT PROCEED WITH TESTING. Have the
instrument checked by Kewtech.
Operation of Function Switch
F1 Measurement mode setting
(X1/2, X1, X5, Ramp, Auto)
F2 IΔn setting
F3
RCD Type setting (
□
,
□
,
□
□
S
,
□
□
S
)
F4 PHASE setting (0° ,180° )
1. Operate the Power button and turn on the instrument.
Turn the rotary switch and select the RCD function.
2. Press the MODE switch(F1) and select any desirable measurement mode.
X1/2 For testing RCD's to verify that they are not
too sensitive.
X1
For measuring the trip time.
X5 For testing at IΔn X5
RAMP (
) For measuring the tripping level in mA.
AUTO For automatic measurement in following
sequence: X1/2(0° ), X1/2(180° ), X1(0° ),X1
(180° ), X5(0° ), X5(180° )
3. Press the IΔn switch (F2) to set Rated Tripping Current (IΔn) to the rated
trip current of the RCD.
4. Press (F3) to select the RCD type.
5. Press (F4) to select phase at which the test current should start.
*UL value change
As a UL value, 25V or 50V is selectable. Refer to 6. Configuration in this
manual and select either of them.
Fig. 33
RCD
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