Bender ISOMETER isoHV525, Manual

Page: 45 / 52

Technical data
45 isoHV525_D00297_04_M_XXEN/05.2018
IT system being monitored
Nominal system voltage
U
n
...................................................................................................AC 0…1000 V/DC 0…1000 V
Tolerance of
U
n
.................................................................................................................................... AC +10 %, DC +10 %
Frequency range of
U
n
................................................................................................................................. DC, 15…460 Hz
Measuring circuit
Permissible system leakage capacitance
C
e
............................................................................................................. ≤ 150 μF
Permissible extraneous DC voltage
U
fg
.....................................................................................................................≤ 1600 V
Measuring voltage
U
m
...................................................................................................................................................±45 V
Measuring current
I
m
bei
R
F
......................................................................................................................................... 120 μA
Internal resistance
R
i
.................................................................................................................................................... 390 kΩ
Response values
ISOMETER isoHV525-S4-4:
Response value
R
an1
............................................................................................................................ 11…500 kΩ (50 kΩ)*
Response value
R
an2
........................................................................................................................... 10…490 kΩ (25 kΩ)*
Relative uncertainty
R
an
...................................................................................................................... ±15 %, at least ±3 kΩ
Hysteresis
R
an
............................................................................................................................................ 25 %, at least 1 kΩ
Undervoltage detection .......................................................................................................................... 30…1.09 kV (off)*
Overvoltage detection .............................................................................................................................. 31…1.10 kV (off)*
Relative uncertainty
U
............................................................................................................................. ±5 %, at least ±5 V
Relative uncertainty depending on the frequency ≥ 200 Hz........................................................................... -0.075 %/ Hz
Hysteresis
U
................................................................................................................................................... 5 %, at least 5 V
ISOMETER isoHV525-M4-4 :
Response value
R
an1
.......................................................................(for customized variant refer to the name plate) 50 kΩ*
Response value
R
an2
......................................................................(for customized variant refer to the name plate) 25 kΩ*
Relative uncertainty
R
an
...................................................................................................................... ±15 %, at least ±3 kΩ
Hysteresis
R
an
............................................................................................................................................ 25 %, at least 1 kΩ
Time response
Response time
t
an
at
R
F
= 0.5 x
R
an
and
C
e
=1 μF acc. to IEC 61557-8 ...................................................................... ≤ 20 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)*
Measured values, storage
ISOMETER isoHV525-S4-4 :
Insulation resistance measured value range (
R
F
) .............................................................................................. 1 kΩ…4 MΩ
Operating uncertainty......................................................................................................................... ±15 %, at least ±3 kΩ
Nominal system voltage measured value range (
U
n
) ............................................................................ 30…1.15 kV r.m.s