
GMC-I Messtechnik GmbH
71
12.2
Minimum Display Values
in Consideration of Operating Error
Table for the calculation of minimum display values for protective
conductor resistance, insulation resistance and differential current
in consideration of instrument operating error:
12.3
List of Abbreviations
R
PC
[m
]
R
ins
[M
]
I [mA]
Limit Value
Max. Display
Limit Value
Min. Display
Limit Value
Max. Display
11
10
0
0.05
0.31
0.2
22
20
0.03
0.1
0.36
0.25
33
30
0.08
0.15
0.42
0.3
44
40
0.12
0.2
0.52
0.4
55
50
0.17
0.25
0.63
0.5
66
60
0.21
0.3
0.74
0.6
77
70
0.31
0.4
0.85
0.7
88
80
0.40
0.5
0.96
0.8
104
90
0.49
0.6
1.07
0.9
115
100
0.58
0.7
1.18
1.0
125
110
0.67
0.8
1.72
1.5
136
120
0.76
0.9
2.26
2.0
147
130
0.85
1.0
2.81
2.5
158
140
1.31
1.5
3.35
3.0
169
150
1.77
2.0
4.43
4.0
180
160
2.23
2.5
5.52
5.0
191
170
2.68
3.0
6.61
6.0
201
180
3.60
4.0
7.69
7.0
212
190
4.51
5.0
8.78
8.0
223
200
5.42
6.0
9.86
9.0
234
210
6.34
7.0
245
220
7.25
8.0
256
230
8.17
9.0
267
240
8.54
10
278
250
13.1
15
288
260
17.7
20
299
270
22.3
25
310
280
26.8
30
321
290
36.0
40
332
300
45.1
50
Abbreviation
Meaning
I
Contact current for leakage current test
U
Voltage drop during protective conductor test
f~
Frequency of measuring voltage
I
MAX
Maximum permissible current before high voltage is switched off
I
N
Nominal current
I
T
Breaking current for high-voltage test
PELV
Protective Extra Low Voltage
R
INS
Insulation resistance
R
PC
Protective conductor resistance
U
INS
Test voltage
U
Measuring voltage
U
T
Voltage value prior to exceeding the breaking current during high-voltage testing
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