Bender A-Isometer IRDH 275, Operating Manual

Page: 59 / 76

59 TGH1361en/11.2009
7. Technical data IRDH275(B)
7.1 Data in tabular form
The values marked with * are absolute values
Insulation coordination acc. to IEC 60664-1
Rated voltage ................................................................................................................................AC 800 V
Rated impulse voltage/pollution degree ....................................................................................... 8 kV / 3
Voltage ranges
IRDH275....:
Nominal voltage range U
n
................................................................................1AC / 3 (N) AC 0...793 V*
Nominal frequency f
n
(for f<50 Hz see characteristic curve on page 64) ............................. 50...460 Hz
Nominal voltage range U
n
.................................................................................................... DC 0...650 V*
IRDH275....-435:
Supply voltage U
s
(see nameplate).....................................................................................AC 88...264 V*
Frequency range U
s
................................................................................................................. 42...460 Hz
Supply voltage U
s
(see nameplate).................................................................................... DC 77...286 V*
IRDH....-427:
Supply voltage U
s
(see nameplate)................................................................................... DC 19.2...72 V*
IRDH275....:
Power consumption......................................................................................................................
≤
14 VA
Response values
Response value R
an1
(Alarm 1) ........................................................................................... 1 k
Ω
...10 M
Ω
Response value R
an2
(Alarm 2) ........................................................................................... 1 k
Ω
...10 M
Ω
Absolute error (1 k
Ω
...10 k
Ω
) ........................................................................................................+2 k
Ω
Relative percentage error (10 k
Ω
...10 M
Ω
)......................................................................... 0%...+20 %
Response time t
an
at R
F
= 0.5 x R
an
and C
e
= 1 μF..........................................................................
≤
5 s
Measuring time..................................................................................................... see characteristic curve
Hysteresis (1 k
Ω
...10 k
Ω
) .............................................................................................................. +2 k
Ω
Hysteresis (10 k
Ω
...10 M
Ω
)............................................................................................................. 25 %
Measuring circuit
Measuring voltage U
m
...................................................................................................................
≤
50 V
Measuring current I
m
max. (at R
F
= 0 Ω ) ...............................................................................
≤
280 μA
Internal DC resistance R
i
............................................................................................................
≥
180 k Ω
Internal impedance Z
i
, at50 Hz .................................................................................................
≥
180 k Ω