31
TGH1266E - 05/04
Points to be Considered before Use
0,001
0,01
0,1
2
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
Curve 4
100 V
150 V
200 V
250 V
300 V
350 V
400 V
U
N
R
F
/kΩ
Test current PGH185 / A
3 AC*
AC *
Test current limit
DC
3 AC
AC
DC *
*
Test current limitation for DC: 25 mA
for 3AC: 17 mA
for AC : 13 mA
Note: observe the voltage limits, 500 V for AC/3AC and 360 V for DC!
This curve shows which maximum test current is generated by the PGH185 in AC, 3AC and DC systems when an insulation fault R
F
is
present in the system. (Example: when U
N
= 400 V and R
F
= 40 kΩ : test current = 10 mA).
The horizontal lines identified as AC, 3AC and DC serve the exclusive purpose of determining the maximum value of the insulation
resistance which can be detected by an EDS165 evaluator.
Examples:
U
N
= DC 200 V: R
Fmax
= 35 Ω
U
N
= AC 400 V: R
Fmax
= 50 Ω
U
N
= AC 230 V: R
Fmax
= 18 Ω
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