Chauvin Arnoux C.A 6115N, Руководство пользователя

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So that the fault voltage (earthing voltage at the nominal current of the RCD) is measured and displayed
in position L - PE, the earth probe must be connected.
If the earth probe and a current clamp are connected to the instrument, the selective earth measurement
is also automatically carried out (position Zs SEL).
5.8.2 Technical specifications
Measurement method:
Loop impedance Z, Loop resistance R as per CEI 61557 - 3
Nominal voltage: 95 ... 145 V, 175 ... 300 V, 330 ... 440 V (L - N or L - L)
Frequency range: 15.3 ... 17.5 Hz, 45 ... 65 Hz
Test current: < 5 A at 230 V / 400 V, max. 15 mA for Zs
Measurement duration: 4 to 50 periods
Permissible overload: U
rms
max. = 500 V (measurement is not started beyond this value)
Measuring Zs without tripping 30 mA RCD’s:
Measurement range Resolution Accuracy
0.20 … 1.99
Ω
0.01
Ω
± (15 % of R. + 3 cts)
2.00 … 199.9
Ω
0.01 … 0.1
Ω
± (5 % of R. + 3 cts)
Measuring Zs with a higher current (< 5 A) for greater accuracy:
Measurement range Resolution Accuracy
0.080 … 0.500
Ω
0.001
Ω
± (10 % of R. + 16 cts)
0.500 … 1.999 … 19.99 … 199.9
Ω
0.001 … 0.1
Ω
± (5 % of R. + 3 cts)
If the selective earth resistance is simultaneously measured (using the earth probe and the clamp), the
measurement range is limited to 199.9
Ω
. See chapter 5.7 for other specifications that remain unchanged
(accuracy, test current).
Measuring the earth connection voltage (SEV 3569) Uref x Z
A
/ Zs
Measurement range Resolution Result calculation
1.Measurement of I
K
, then
0 … 200 V 1 V 2.Measurement of Z
A
(not displayed), then
3.Calculation of Z
A
x I
K
= Fault voltage
Max. probe resistance:
≤
15 k
Ω
Max. parasite voltage: 70 V in relation to PE potential. Measurement not started beyond these voltages.
Measuring Rsel with leads compensation
Range Resolution Accuracy
0.0800 ... 1.999
Ω
0.001
Ω
± (10% +16 digit)
2 ... 19.99
Ω
0.01
Ω
± (10% +16 digit)
20 ... 199.9
Ω
0.1
Ω
± (20% + 16 digit)
Short-circuit current:
I
K
range Resolution Calculation formula
0.1 A ... 29.9 kA 0.1 A ... 100 A I
K
= U
REF
/ R
S