33
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
F
1
Measurement mode setting
(X
1
/
2
, X
1
, X
5
, Ramp, Auto)
F
2
I
Δ
n setting
F
3
RCD Type setting (
□
,
□
,
□
□
S
,
□
□
S
)
F
4
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(F
1
) and select any desirable measurement mode.
X
1
/
2
For testing RCD's to verify that they are not
too sensitive.
X
1
For measuring the trip time.
X
5
For testing at I
Δ
n X
5
RAMP ( )
For measuring the tripping level in mA.
AUTO
For automatic measurement in following
sequence: X
1
/
2
(
0
°
), X
1
/
2
(
180
°
), X
1
(
0
°
),X
1
(
180
°
), X
5
(
0
°
), X
5
(
180
°
)
3
. Press the I
Δ
n switch (F
2
) to set Rated Tripping Current (I
Δ
n) to the rated
trip current of the RCD.
4
. Press (F
3
) to select the RCD type.
5
. Press (F
4
) to select phase at which the test current should start.
*UL value change
As a UL value,
25
V or
50
V is selectable. Refer to
6
. Configuration in this
manual and select either of them.
Fig.
33
RCD
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