ISOMETER® IR425

ISOMETER® IR425
ISOMETER® IR425
Insulation monitoring device for unearthed
AC/DC control circuits (IT systems)
IR425-D4_D00039_03_D_XXEN/06.2016
ISOMETER® IR425
Insulation monitoring device for unearthed
AC/DC control circuits (IT systems)
Product description
The ISOMETER®s of the IR425 series monitor the insulation resistance of unearthed AC/DC
control circuits (IT systems) 0…300 V. DC components existing in AC/DC systems do not
influence the operating characteristics. An external supply voltage allows de-energised
systems to be monitored too.
Application
• AC/DC control circuits in the industrial sector, mechanical engineering, power plants,
elevators, automation systems etc.
• AC/DC control and auxiliary circuits in accordance with DIN EN 60204-1
“Electrical equipment of machines”, IEC 60204-1, EN 60204-1
ISOMETER® IR425
Device features
• Insulation monitoring for AC/DC control
circuits 0…300 V
• Two separately adjustable response values
• Preset function
(automatic setting of basic parameters)
• Connection monitoring system/earth
• LEDs: Power On, Alarm 1, Alarm 2
• Internal/external test/reset button
• Two separate alarm relays
(one changeover contact each)
• N/O or N/C operation, selectable
• Fault memory behaviour, selectable
• Self monitoring with automatic alarm
• Multi-functional LC display
• Adjustable response delay
• Two-module enclosure (36 mm)
• AC/DC auxiliary circuits in accor­dance with DIN VDE 0100-725 (VDE 0100-725)
• Smaller AC/DC IT systems such as lighting systems
Function
The currently measured insulation resistance is indicated on the LC display. In this way
any changes, for example when circuits are connected to the system, can be recognised
easily. When the value falls below the preset response values, the response delay “ton”
starts. Once the response delay “ton” has elapsed, the alarm relays “K1/K2” switch and the
alarm LEDs “AL1/AL2” light up. Two separately adjustable response values/alarm relays
allow a distinction to be made between prewarning and alarm. If the insulation resistance
exceeds the release value (response value plus hysteresis), the alarm relays return to their
initial position. Insulation faults are distinguished according to AC and DC faults (indication ±).
If the fault memory is enabled, the alarm relays remain in the alarm state until the reset
button is pressed or until the supply voltage is switched off. The device function can be
tested using the test button. The parameterisation of the device can be carried out via
the LC display or the function keys integrated in the front plate.
Connection monitoring
The connections to the system (L1/L2) and to earth (E/KE) are either automatically checked
every 24 h, or by pressing the test button or when supply voltage has been connected.
In case of interruption of a connecting lead, the alarm relay K2 switch, the LEDs ON/AL1/AL2
flash and the following message appears on the display:
• Push-wire terminal
(two terminals per connection)
“E.02” signals a fault in the connecting leads to the system,
Approvals
After eliminating the fault, the alarm relays return to their initial position either automatically
or by pressing the reset button.
“E.01” signals a fault in the connecting leads to PE.
Preset function
After connecting the device for the first time, the nominal system voltage is measured
and the response values are set automatically.
Measurement method
The ISOMETER® IR425 uses the AMP measuring principle.
Standards
The ISOMETER® of the IR425 complies with the requirements of the device standards:
DIN EN 61557-8 (VDE 0413-8), IEC 61557-8, ASTM F 1669M-96 (2007).
2IR425-D4_D00039_03_D_XXEN/06.2016
ISOMETER® IR425-D4
Operating elements
1
Wiring diagram
2
3
1
6
4
3
2
7
3
5
6
7
1 - LED power “ON”, (flashes in case of interruption of the
connecting leads E/KE or L1/L2).
4
2 - Alarm LED “AL1”, lights when the value falls below the set
response value Alarm 1 and flashes in case of interruption of
the connecting leads E/KE or L1/L2.
3 - Alarm LED “AL2”, lights when the value falls below the set
response value Alarm 2 and flashes in case of interruption of
the connecting leads E/KE or L1/L2.
4 - LC display
5
5 - Test button “T”: to call up the self test.
Arrow up button: parameter change, to move up in the menu
6 - Reset button “R”: to delete stored insulation fault alarms
Arrow down button: parameter change, to move down in the menu
7 - Menu button “MENU”: to call up the menu system.
Enter button: Confirms parameter changes
1 - Supply voltage US (see ordering details) via fuse
2 - Separate connection of E, KE to PE
3 - Connection to the IT system to be monitored:
AC: connect terminals L1, L2 to conductor L1, L2.
4 - Alarm relay “K1”: Alarm 1
5 - Alarm relay “K2”: Alarm 2
6 - Combined test and reset button “T/R”:
short-time pressing (< 1.5 s) = RESET,
long-time pressing (> 1.5 s) = TEST
7 - Line protection by a fuse in accordance with IEC 60364-4-43
(6 A fuse recommended). In case of supply (A1/A2) from an
IT system, both lines have to be protected by a fuse.
IR425-D4_D00039_03_D_XXEN/06.20163
ISOMETER® IR425-D4
Technical data
Insulation coordination acc. to IEC 60664-1/IEC 60664-3
Environment/EMC
Rated insulation voltage
250 V
Rated impulse voltage/pollution degree
4 kV/3
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
2.2 kV
EMC
IEC 61326-2-4
Operating temperature
-25…+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
Option “W“
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)
3M7
Transport (IEC 60721-3-2)
2M2
Long-time storage (IEC 60721-3-1)
1M3
Supply voltage
Supply voltage US
Power consumption
see ordering information
≤ 4 VA
IT system being monitored
Nominal system voltage Un
Nominal frequency fn AC/DC 0…300 V
DC 15…460 Hz
Response values
Response value Ran1 (Alarm 1) 1…200 kΩ
Response value Ran2 (Alarm 2)
1…200 kΩ
Preset mode Un ≤ 72 V Ran1 (Alarm 1) = 20 kΩ/Ran2 (Alarm 2) = 10 kΩ
Un > 72 V Ran1 (Alarm 1) = 46 kΩ/Ran2 (Alarm 2) = 23 kΩ
Relative uncertainty 1…5 kΩ/5…200 kΩ
± 0.5 kΩ/± 15 %
Hysteresis
25 %
Time response
Response time tan at RF = 0.5 x Ran and Ce = 1 μF Start-up delay (start time) t Response delay ton
≤2s
0…10 s (0 s)*
0…99 s (0 s)*
Measuring circuit
Measuring voltage Um Measuring current Im (at RF = 0 Ω)
Internal DC resistance Ri
Impedance Zi at 50 Hz
Permissible system leakage capacitance ± 12 V
≤ 200 µA
≥ 62 kΩ
≥ 60 kΩ
≤ 20 μF
Displays, memory
Display range, measured value Operating uncertainty 1…5 kΩ/5 kΩ…1 MΩ Password Fault memory, alarm relay
1 kΩ…1 MΩ
± 0.5 kΩ/± 15 %
off/0…999 (off)*
on/off*
Inputs
Cable length test and reset button
≤ 10 m
Switching elements
Number of switching elements Operating principle
Electrical endurance, number of cycles Contact data acc. to IEC 60947-5-1
Utilisation category
Rated operational voltage
Rated operational current
Minimum contact rating
Connection
Connection type
Connection properties
rigid
Flexible without ferrule
Flexible with ferrule
Stripping length
Opening force
Test opening, diameter
AC-13AC-14DC-12DC-12 DC-12
230 V 230 V 220 V 110 V
24 V
5 A
3 A 0.1 A 0.2 A
1A
1 mA at AC/DC ≥ 10 V
4IR425-D4_D00039_03_D_XXEN/06.2016
0.2…2.5 mm² (AWG 24…14)
0.75…2.5 mm² (AWG 19…14)
0.2…1.5 mm² (AWG 24…16)
10 mm
50 N
2.1 mm
Other
Operating mode
Mounting
Degree of protection, internal components (DIN EN 60529)
Degree of protection, terminals (DIN EN 60529)
Enclosure material
Flammability class
DIN rail mounting acc. to
Screw mounting
Documentation number
Weight ( )* = factory setting
2 x 1 changeover contact
NC/N/O operation (N/O operation)*
10000
push-wire terminal
continuous operation
any position
IP30
IP20
polycarbonate
UL94 V-0
IEC 60715
2 x M4 with mounting clip
D00039
≤ 150 g
ISOMETER® IR425-D4
Ordering information
Supply voltage 1) US
AC
DC
16…72 V, 15…460 Hz
9.6…94 V
70…300 V, 15…460 Hz
70…300 V
Type
Art. No.
IR425-D4-1
IR425-D4W-1
IR425-D4-2
IR425-D4W-2
B 7103 6403
B 7103 6403W
B 7103 6402
B 7103 6402W
Device version with screw terminals on request.
1)
Absolute values
Accessories
Dimension diagram XM420
Type designation
Art. No.
Mounting clip for screw mounting
(1 piece per device)
B 9806 0008
Dimensions in mm
Screw mounting
Open the front plate cover in
direction of arrow!
Note: The upper mounting clip
must be ordered separately
(see ordering information).
IR425-D4_D00039_03_D_XXEN/06.20165
BENDER Group
IR425-D4_D00039_03_D_XXEN / 06.2016 / pdf / © Bender GmbH & Co. KG, Germany – Subject to change! The specified standards take into account the version that was valid at the time of printing.
Bender GmbH & Co. KG
P.O. Box 1161 • 35301 Gruenberg • Germany
Londorfer Strasse 65 • 35305 Gruenberg • Germany
Tel.: +49 6401 807-0 • Fax: +49 6401 807-259
E-Mail: info@bender.de • www.bender.de
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