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- IRDH275B-435
In Stock
Ships by Friday, August 21
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· Product image is representative; revision or series may vary. Contact us to request a specific version.
We provide 1 year warranty for all remaining parts.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online.
If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.
Amikon offers a wide range of components, products and services related to industrial automation. We have a large surplus of stocks and are also distributors of new products from a variety of quality manufacturers.
Technical specifications for IRDH275B-435
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Product ModelIRDH275B-435
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Product ParametersINSULATION MONITORING DEVICE
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Tariff Code8537101190
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Country of originUSA
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Place of shipmentXiamen, China
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In stock1 unit
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Estimated Shipping Size11.1x11.1x7.3cm
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ManufacturerBENDER
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Weight0.5 kg
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Rated insulation voltageAC 800 V
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Rated impulse voltage/pollution degree8 kV/3
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Supply voltageAC 88…264 V
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Frequency range42…460 Hz
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Response value1 kΩ…10 MΩ
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Relative uncertainty± 15 %
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Hysteresis+2 kΩ
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Measuring voltag≤ 50 V
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Measuring current Im≤ 280 μA
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Internal DC resistance≥ 180 kΩ
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Permissible system leakage capacitance≤ 500 μF
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Ambient temperature-40…+70 °C
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Storage temperature range- 40…+85 °C
Description
The ISOMETER® of the IRDH275 series is designed to monitor the insulation resistance ofunearthed main circuits (IT systems) AC, AC/DC 0…793 V resp. DC 0…650 V. The AMPPlusmeasurement method meets the particular requirements of modern power supplieswhich often include rectifiers, converters, thyristor-controlled DC drives and directly connectedDC components. In these systems often high leakage capacitances against earth occurdue to interference suppression measures. The IRDH275 automatically adapts itself to theexisting system conditions.
In combination with a coupling device, the devices can also be used for higher voltages.An external supply voltage allows de-energised systems to be monitored too. For doormounting into distribution panels, refer to type IRDH375
In combination with a coupling device, the devices can also be used for higher voltages.An external supply voltage allows de-energised systems to be monitored too. For doormounting into distribution panels, refer to type IRDH375
Information
Overview
Manuals
Function
Product Applications
Control & Interface I/O
Features:
- Insulation monitoring for unearthed AC,AC/DC systems 0…793 V, DC 0…650 V
- Nominal voltage extendable via couplingdevice
- Two separately adjustable response values1 kΩ…10 MΩ
- Automatic adaptation to the systemleakage capacitance
- Info button to display device settingsand system leakage capacitance
- Self monitoring with automatic alarme
- Automatic self test, selectable
The BENDER IRDH275B-435 provides two separately adjustable response values from 1 kΩ to 10 MΩ. When the insulation resistance falls below a configured response value, the corresponding alarm function is activated. Two alarm relays allow different alarm levels, such as prewarning and alarm, to be distinguished.
The IRDH275B-435 BENDER Insulation monitoring device may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).
BENDER IRDH275B-435 Insulation monitoring device Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
When the insulation resistance between the system conductors and earth falls below theset response value, the alarm relays switch and the alarm LEDs light up. Two separatelyadjustable alarm relays allow to distinguish between prewarning and alarm. The measuredvalue is indicated on the LC display or an externally connectable measuring instrument.In this way any changes, for example when circuits are connected to the system, can berecognised easily. The fault message can be stored. The fault memory can be reset bypressing the reset button. By pressing the test button, the function of the device as wellas the connections to system and earth can be tested. Pressing the Info button providesadditional information, such as the existing system leakage capacitance or device settings.The function of the device and the system and earth connections are continuously monitored. When a fault occurs, the system fault relay switches and the alarm LED “system fault”lights up. The parameterisation of the device can be carried out via the LC display or thefunction buttons integrated in the front plate
- Variable-Speed Drives/Converters: Monitors AC/DC systems with rectifiers, thyristor drives, and switch-mode power supplies
- Renewable Energy (PV): Tracks insulation resistance in solar installations with high leakage capacitance and complex inverters
- Power Generation/Heavy Industry: Prevents sudden shutdowns in continuous process industries, manufacturing, and power plants
- Maritime/Railway (Option W): Deployed on ships, offshore platforms, and rolling stock requiring enhanced shock/vibration resistance
This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
External Test/Reset: Wire an external N/O contact to T1/T2 for remote testing, and an N/C contact or wire jumper to R1/R2 for remote resetting.
Coupled Systems (Standby): Utilize function terminals F1/F2 to inhibit measurement via an external control signal when multiple Isometers are joined on a common bus.
Analog Output: Terminals provide an isolated 0(4)–20 mA current output map tracking live insulation resistance.
BMS Protocol: Connect network communication lines to the galvanically isolated RS-485 serial interface terminals (A/B)
Alternative Names
IRDH2758-435
IRDHZ75B-435
1RDH275B-435
IRDH275B 435
IRDH2758 435
IRDHZ75B 435
1RDH275B 435
IRDH275B435
Technical notes
The function of the device and the system and earth connections are continuously monitored. When a fault occurs, the system fault relay switches and the alarm LED “system fault”lights up. The parameterisation of the device can be carried out via the LC display or thefunction buttons integrated in the front plate.
FAQs
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Can it stay connected during high-voltage insulation tests?
+No. You must disconnect and isolate the ISOMETER® from the IT system prior to performing standard dielectric insulation or high-voltage voltage tests to prevent internal damage -
Can multiple units be used on one coupled system?
+No. Only one insulation monitoring device can be active per conductively connected system, or device interference and false readings will occur. -
What measurement method does it use?
+It uses the patented AMPPlus measurement method. This technology automatically adapts to system leakage capacitances. It ensures precise monitoring even in modern power supply environments with complex, directly connected DC components, such as rectifiers or variable-frequency drives. -
How should ground connections be wired?
+Terminals and KE must link via a separate, dedicated wire directly to the protective earth (PE) conductor and must never be left floating during active system operation
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