Bender ISOMETER isoRW425 - IT System and Measuring Circuit Parameters; Response Values and Time Response

Technical data
68
isoRW425_D00052_03_M_XXEN / 02.2017
Frequency range U
s
..................................................................................................................................... 47…63 Hz
Power consumption .............................................................................................................................. ≤ 3 W, ≤ 9 VA
IT system being monitored
Nominal system voltage U
n
.................................................................................................3(N)AC, AC/DC 0…400 V
Tolerance of U
n
................................................................................................................................................... +25 %
Frequency range of U
n
........................................................................................................................ DC, 15…460 Hz
Measuring circuit
Measuring voltage U
m
........................................................................................................................................ ± 12 V
Measuring current I
m
at R
F
, Z
F
= 0 Ω ............................................................................................................ ≤ 110 A
Internal resistance R
i,
Z
i
................................................................................................................................... ≥ 115 kΩ
Permissible system leakage capacitance C
e
(R mode) ................................................................................... ≤ 300 F
Permissible system leakage capacitance C
e
(Z mode)........................................................................................ ≤ 1 F
Permissible extraneous DC voltage U
fg
............................................................................................................. ≤ 700 V
Response values
Response value R
an1
...................................................................................................................... 2…990 kΩ (40 kΩ)*
Response value R
an2
...................................................................................................................... 1…980 kΩ (10 kΩ)*
Relative uncertainty R
an
(R mode or Z
F
≈ R
F
).......................................................................... ± 15 %, at least ±1 kΩ
Hysteresis R
an
.................................................................................................................................. 25 %, at least 1 kΩ
Response value Z
an1
......................................................................................................................... 11…500 kΩ (off)*
Response value Z
an2
......................................................................................................................... 10…490 kΩ (off)*
Relative uncertainty Z
an
............................................................................................................ ± 15 %, at least ±1 kΩ
Hysteresis Z
an
................................................................................................................................... 25 %, at least 1 kΩ
Undervoltage detection..................................................................................................................... 10…499 V (off)*
Overvoltage detection........................................................................................................................ 11…500 V (off)*
Relative uncertainty U.................................................................................................................. ± 5 %, at least ± 5 V
Relative uncertainty depending on the frequency ≥ 400 Hz..................................................................-0.015 % / Hz
Hysteresis U .......................................................................................................................................... 5 %, at least 5 V
Time response
Response time t
an
of R
F
= 0.5 x R
an
and C
e
=1 F according to IEC 61557-8 ................................................... ≤ 10 s
Response time t
an
of Z
F
= 0.5 x Z
an
...................................................................................................................... ≤ 5 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)*