MPI-535
– BRIEF USER MANUAL
36
RCD trigger and response time test t
A
(for measurement function t
A
)
Test range according to IEC 61557-6: 0ms ... to the upper limit of displayed value
Type
of RCD
Setting
of multi-
ple val-
ues
Test range
Resolution
Basic
uncertainty
General
and
short-time delay
type
0.5 I
n
0..300 ms (TN/TT)
0..400 ms (IT)
1 ms
±(2% m.v. + 2 dig-
its)
1)
1 I
n
2 I
n
0..150 ms
5 I
n
0..40 ms
Selective
0.5 I
n
0..500 ms
1 I
n
2 I
n
0..200 ms
5 I
n
0..150 ms
1)
for I
n
= 10 mA and 0.5 I
n
uncertainty is
±(2% m.v. + 3 digits)
Accuracy of differential current setting:
dla 1*I
n
, 2*I
n
i 5*I
n
..................................................................... 0..8%
for 0.5*I
n
.................................................................................... -8..0%
7.1.6
Measurement of resistance to earth R
E
Test range according to IEC 61557-5: 0.50
…1.99 k
for test voltage of 50 V
oraz 0.56
…1.99 k
for test voltage of 25 V
Range
Resolution
Basic uncertainty
0.00...0.35
Ω
0.01 Ω
(2% m.v. + 10 digits)
0.35
...9.99 Ω
0.01 Ω
(2% m.v. + 4 digits)
10.0...99.9 Ω
0.1 Ω
(2% m.v. + 3 digits)
100...999 Ω
1 Ω
1.00...1.99 kΩ
0.01 kΩ
test voltage: 25 V or 50 V rms
test current: 20 mA, sinusoidal rms 125 Hz (for f
n
=50 Hz) and 150 Hz (for f
n
=60 Hz)
blocking of measurement at interference voltage of U
N
>24 V
maximum measured voltage of interferences U
Nmax
=100 V
maximum resistance of auxiliary earth electrodes 50 kΩ
Selective measurement of earthing with two clamps
Range
Resolution
Basic
uncertainty*
0.00...0.35
Ω
0.01 Ω
±(10% m.v. + 10 digits)
0.35
...9.99 Ω
0.01 Ω
±(10% m.v. + 4 digits)
10.0...19.9 Ω
0.1 Ω
20.0...99.9 Ω
±(20% m.v. + 4 digits)
*
– at maximum interference current of 1 A
Measurement with transmitting clamps N-1 and receiving clamps C-3.
The range of interference current is up to 9.99 A.
