Technical Specifications; Rcd Testing; General Data; Contact Voltage Rcd-Uc - METREL MI 3122 Instruction Manual

MI 3122 Smartec Z Line-Loop / RCD

8 Technical specifications

8.1 RCD testing

8.1.1 General data

Nominal residual current (A,AC) ....... 10 mA, 30 mA, 100 mA, 300 mA, 500 mA,
Nominal residual current accuracy .... -0 / +0.1  I  ; I  = I  N, 2  I  N, 5  I  N
Test current shape ............................ Sine-wave (AC), pulsed (A)
DC offset for pulsed test current ....... 6 mA (typical)
RCD type .......................................... G (non-delayed), S (time-delayed)
Test current starting polarity ............. 0 º or 180 º
Voltage range ................................... 50 V  264 V (45 Hz  65 Hz)
RCD test current selection (r.m.s. value calculated to 20ms) according to IEC 61009:
I  N × 1/2
I  N (mA)
AC
10 5
30 15
100 50
300 150
500 250
1000 500
n.a. .................................................... not applicable
AC type ............................................. sine wave test current
A type...... ........................................ pulsed current

8.1.2 Contact voltage RCD-Uc

Measuring range according to EN61557 is 20.0 V  31.0V for limit contact voltage 25V
Measuring range according to EN61557 is 20.0 V  62.0V for limit contact voltage 50V
Measuring range (V)
0.0  19.9
20.0  99.9
The accuracy is valid if mains voltage is stabile during the measurement and PE terminal
is free of interfering voltages.
Test current ....................................... max. 0.5  I
Limit contact voltage ......................... 25 V, 50 V
Specified accuracy is valid for complete operating range.
1000 mA
-0.1  I  / +0; I  = 0.5  I  N
AS / NZ selected: ± 5 %
I  N × 1
A AC A
3.5 10 20
10.5 30 42
35 100 141
105 300 424
175 500 707
350 1000 1410
Resolution (V)
0.1
I  N × 2 I  N × 5
AC A AC
20 40 50
60 84 150
200 282 500
600 848 1500
1000 1410 2500
2000 n.a. n.a.
Accuracy
(-0 % / +15 %) of reading ± 10 digits
(-0 % / +15 %) of reading
N
46
Technical specifications
RCD I 
A AC
100 

212
707 

n.a.

n.a.
n.a. 
A





