Technical data
59
isoEV425_D00126_09_M_XXEN/03.2019
IT system being monitored
Nominal system voltage U
n
with AGH420 .................................................... 3(N)AC, AC 0…690 V/DC 0…1,000 V
Tolerance of U
n
...........................................................................................................................AC +15 %, DC +10 %
Nominal system voltage range U
n
with AGH420 (UL508) ................................................................AC/DC 0…600 V
Frequency range of U
n
..........................................................................................................................DC, 15…460 Hz
Measuring circuit
Permissible system leakage capacitance C
e
(isoEV425)...................................................................................... ≤ 5 F
Permissible system leakage capacitance C
e
(isoEV425HC).............................................................................. ≤ 20 F
Permissible extraneous DC voltage U
fg
......................................................................................................... ≤ 1,150 V
Response values
Response value R
an1
(isoEV425) ................................................................................................ 2…500 kΩ (500 kΩ)*
Response value R
an1
(isoEV425HC)............................................................................................ 2…500 kΩ (200 kΩ)*
Response value R
an2
(isoEV425) ................................................................................................ 1…490 kΩ (100 kΩ)*
Operating uncertainty R
an
(C
e
≤ 5 F)...................................................................................... ±15 %, at least ±1 kΩ
Operating uncertainty R
an
(C
e
> 5 F und R
F
>100 kΩ)............................................... ±(5 % * R
an
/100 kΩ +10 %)
Hysteresis R
an
.................................................................................................................................. 25 %, at least 1 kΩ
Undervoltage detection ................................................................................................................. 30…1.14 kV (off)*
Overvoltage detection .....................................................................................................................31…1.15 kV (off)*
Relative uncertainty U.................................................................................................................... ±5 %, at least ±5 V
Relative uncertainty depending on the frequency
≥
200 Hz...................................................................... -0.03 %/Hz
Hysteresis U .......................................................................................................................................... 5 %, at least 5 V
Time response
Response time t
an
at R
F
= 0.5 x R
an
and C
e
=1 F acc. to IEC 61557-8 ............................................................. ≤ 10 s
Start-up delay t ...................................................................................................................................... 0…10 s (0 s)*
Response delay t
on
................................................................................................................................. 0…99 s (0 s)*
Delay on release t
off
............................................................................................................................... 0…99 s (0 s)*
Displays, memory
Display..................................................................................................... LC display, multi-functional, not illuminated
Display range measured value insulation resistance (R
F
) ........................................................................ 1 kΩ…1 MΩ
Operating uncertainty
(C
e
≤ 5 F)............................................................................................ ±15 %, at least ±1 kΩ
Operating uncertainty
(C
e
> 5 F und R
F
>100 kΩ) ...................................................... ±(5 % * R
F
/100 kΩ +10 %)
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