Chauvin Arnoux C.A 6115N, Руководство пользователя

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Next, a non-tripping test of the RCD is carried out automatically. To do this, the network is charged
throughout 50 periods (> 1000 ms) with 50% of I
∆
N
.
Depending on the user’s initial choice, the following test is either a “Ramp” test to obtain the exact RCD
tripping current, or a “Pulse” test to obtain the tripping time of the RCD:
■
In the “RAMP” function, the fault current generated is increased in seventeen steps from 50 % to 103
% of I
∆
N
. Each step (current level) is held constant for 200 ms. The exact current (I
A
) and the tripping
duration (t
A
) for the step that causes the RCD to trip are both measured and displayed.
■
In the “PULSE” function the nominal fault current (I
∆
N
) set is applied constantly for a maximum of 500
ms. During a selective RCD test ( ), twice the nominal fault current (2x I
∆
N
) is applied. If the RCD
trips, the tripping duration is measured and displayed (t
A
). If this duration is between 200 ms and 500
ms, the result flashes to indicate that this time is above the standards currently in effect.
No matter which test is chosen, the phase (0-180°) and the form (sine/DC pulse) of the test current can
be selected.
If the "
" symbol is brought up on the LCD screen, only the initial test at I < 40 I
∆
N
is made: fault
voltage, loop resistance ..., without tripping the RCD. These tests (loop, earth…) are very useful for
quickly analysing an installation but are of lower accuracy than with the specific functions.
Check against N-PE wire exchange. If a RCD does not trip within the test period the instrument tests the
same RCD again with inversed N-PE connections automatically. If the RCD trips then, there might be a
failure in the wiring of the installation. The instrument answers with an error message in blinking N-PE
symbols. The same function is carried out when a no tripping measurement is chosen.
5.6.2 Technical specifications
Measurement method: Measurement of line drop (without probe) or of the voltage difference (with probe)
as per DIN VDE 60413 part 6 (8/87)
RCD test as per EN 61557-6
Nominal voltage: 95-145, 175-300 V sine
Frequency range: 15.3...17.5 Hz, 45...65 Hz
Permissible overload: U
rms
max. = 500 V (No measurement is made beyond 300 V)
Duration of measurement (with triggering): 1.5 s in Pulse mode, 1 s if 5 I
∆
N
, 3.4s maximum in Ramp mode
Duration of measurement (without triggering) : 1 s
Adjustable nominal fault current I
∆
N
Accuracy
Comments
...% theoretical value
10, 30, 100, 300, 500 mA
Variable : 6 … 1000 mA
0 ... + 7 % I
∆
N
max. 1000 mA
x1, x2, x5 I
∆
N
, 150, 250 mA
Internal resistance: approximately 400 k
Ω
Nominal fault current Measurement range Resolution Accuracy
I
∆
N
(mA) R
A
and Z
S
(
Ω
)
10 20 … 999
Ω
- 9.99 k
Ω
1…10
30 2 … 999
Ω
- 3.33 k
Ω
0.1… 10
100 2 … 999
Ω
0.1 …1
10 % of R. + 4 cts
300 0.2 …333
Ω
0.01 … 1
500 0.2 …199
Ω
0.01 … 1
1000 0.2 … 99.9
Ω
0.01
Measurement range of the contact voltage (U
F
) Resolution Accuracy
0.1 ... 1,5 ... 99.9 V 0.1 V 0...+15 % of R. + 2 cts