Datasheet
34 TDB101012en / Main catalogue part 1 – Insulation monitoring / 09.2011
1.1
A-ISOMETER® IR420
Technical data
Insulation coordination acc. to IEC 60664-1 / IEC 60664-3
Rated insulation voltage 250 V
Rated impulse voltage/pollution degree 2.5 kV / III
Protective separation (reinforced insulation) between
(A1, A2) - (L1, L2, E, KE, T/R) - (11, 12, 14) - (21, 22, 24)
Voltage test acc. to IEC 61010-1 2.21 kV
Supply voltage
Supply voltage U
S
see ordering information
Power consumption ≤ 3 VA
IT system being monitored
Nominal system voltage U
n
AC 0…300 V
Nominal frequency f
n
42…460 Hz
Response values
Response value R
an1
(Alarm 1) 1…200 kΩ
Response value R
an2
(Alarm 2) 1…200 kΩ
PreSet mode U
n
≤ 72 V R
an1
(Alarm 1) = 20 kΩ / R
an2
(Alarm 2) = 10 kΩ
U
n
> 72 V R
an1
(Alarm 1) = 46 kΩ / R
an2
(Alarm 2) = 23 kΩ
Relative uncertainty 1 kΩ…5 kΩ / 5 kΩ…200 kΩ ± 0.5 kΩ / ± 15 %
Hysteresis 25 %
Time response
Response time t
an
at R
F
= 0.5 x R
an
and C
e
= 1 F ≤ 1 s
Start-up delay t 0…10 s (0 s)*
Response delay t
on
0…99 s (0 s)*
Measuring circuit
Measuring voltage U
m
12 V
Measuring current I
m
(at R
F
= 0 Ω) ≤ 200 µA
Internal DC resistance R
i
≥ 62 kΩ
Impedance Z
i
at 50 Hz ≥ 60 kΩ
Permissible extraneous DC voltage U
fg
≤ DC 300 V
Permissible system leakage capacitance ≤ 20 F
Displays, memory
Display range, measuring value 1 kΩ…1 MΩ
Operating uncertainty 1 kΩ…5 kΩ / 5 kΩ…1 MΩ ± 0.5 kΩ / ± 15 %
Password off / 0…999 (off)*
Fault memory, alarm relay on/off*
Outputs
Cable length test and reset button ≤ 10 m
Switching elements
Number of switching elements 2 x 1 changeover contact
Operating principle NC / N/O operation (N/O operation)*
Electrical service life, number of cycles 10.000
Contact data acc. to IEC 60947-5-1
Utilisation category AC-13 AC-14 DC-12 DC-12 DC-12
Rated operational voltage 230 V 230 V 220 V 110 V 24 V
Rated operational current 5 A 3 A 0.1 A 0.2 A 1 A
Minimum contact rating 1 mA at AC / DC ≥ 10 V
Environment/EMC
EMC IEC 61326
Operating temperature - 25 °C…+ 55 °C
Climatic class acc. to IEC 60721
Stationary use (IEC 60721-3-3) 3K5 (except condensation and formation of ice)
Transport (IEC 60721-3-2) 2K3 (except condensation and formation of ice)
Long-time storage (IEC 60721-3-1) 1K4 (except condensation and formation of ice)
Classification of mechanical conditions IEC 60721
Stationary use (IEC 60721-3-3) 3M4
Transport (IEC 60721-3-2) 2M2
Long-time storage (IEC 60721-3-1) 1M3
Connection
Connection type push-wire terminal
Connection properties
rigid 0.2…2.5 mm² / AWG 24-14
Flexible without ferrule 0.2…2.5 mm² / AWG 24-14
Flexible with ferrule 0.2…1.5 mm² / AWG 24-16
Stripping length 10 mm
Opening force 50 N
Test opening, diameter 2.1 mm
Other
Operating mode continuous operation
Mounting any position
Degree of protection, internal components (IEC 60529) IP 30
Degree of protection, terminals (IEC 60529) IP 20
Enclosure material polycarbonate
DIN rail mounting acc. to IEC 60715
Screw mounting 2 x M4 with mounting clip
Operating manual TBP101012
Weight ≤ 150 g
( )* = factory setting
Accessories
Type Art. No.
Mounting clip for screw mounting (1 piece per device) B 9806 0008
Ordering information
Type Nominal system voltage* U
n
Supply voltage* U
S
Response value R
an
System leakage capacitance C
e
Art. No.
IR420-D4-1 AC 42…460 Hz 0…300 V DC 9.6…94 V / AC 42…460 Hz 16…72 V 1…200 k < 20 µF B 7101 6409
IR420-D4-2 AC 42…460 Hz 0…300 V DC 70…300 V / AC 42…460 Hz 70…300 V 1…200 k < 20 µF B 7101 6405
Device version with screw terminals on request.
* Absolute values