IRDH575B1W-435 | IRDH575B1-435 | Insulation monitoring device

The ISOMETER® of the IRDH575 series monitors the insulation resistance of unearthed
power supplies (IT systems). It is suitable for universal use in 3(N)AC, AC/DC and DC systems. AC systems may include extensive DC-supplied loads, such as converters or thyristor-controlled DC drives. The IRDH575 in combination with EDS4… series insulation fault
locators and the appropriate measuring current transformers is designed to set up the respective equipment for insulation fault location.

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IRDH575B1W-435 | IRDH575B1-435 | Insulation monitoring device

Product Description

http://www.bender.ro/arhiva/fisa_tehnica/IRDH575_D00089_D_XXEN.pdf

Product description
The ISOMETER® of the IRDH575 series monitors the insulation resistance of unearthed
power supplies (IT systems). It is suitable for universal use in 3(N)AC, AC/DC and DC systems. AC systems may include extensive DC-supplied loads, such as converters or thyristor-controlled DC drives. The IRDH575 in combination with EDS4… series insulation fault
locators and the appropriate measuring current transformers is designed to set up the respective equipment for insulation fault location.
Function insulation monitoring
When the insulation resistance between the system conductors and earth falls below the set response value, the alarm relays switch and the alarm LEDs light up. Two separately adjustable alarm relays (N/C or N/O operation) allow a distinction to be made between “prewarning” and “alarm”. The measured value 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 be recognised easily. The fault message can be stored. The fault memory can be reset by pressing the internal or external reset button.
By pressing the test button, the function of the device as well as the connections to system and earth can be tested. Pressing the Info key provides additional information, such as the existing system leakage capacitance or device settings.

IRDH575B1W-435

Product parameter

• Universal application in 3(N)AC, AC/DC and DC IT systems 20…575 V/340…760 V
• Response range 1 kΩ…10 MΩ
• Info button for the indication of various parameters and the system leakage capacitance
• Comprehensive self-monitoring function including system fault alarm relay
• Internal/external test and reset button
• Two separate alarm relays, N/C or N/O operation selectable
• Backlit plain text display 4 x 16 characters
• RS-485 interface
• Data memory, disconnection from supply and 0/4…20 mA current output
• Can be extended to an insulation fault location system for max.1080 circuits
• Adjustable locating current for insulation fault location
• Appropriate for EDS4… insulation fault location systems
• AMP measurement method

Application field

Insulation fault location is carried out with EDS4… series insulation fault locators and the respective measuring current transformers. When the IRDH575 detects an insulation fault, the insulation fault location process is started automatically or manually. The IRDH575 generates a locating current the amplitude of which is dependent on the existing system voltage and the insulation fault. When low-resistance insulation faults occur, the locating current is limited by the IRDH575. This limit value can be set via an appropriate menu. The locating current pulse flows from the IRDH575 via the live parts, taking the shortest path to the location of the insulation fault. From there, it flows via the insulation fault and the PE back to the IRDH575. This locating current pulse is then detected by the measuring current transformers located in the insulation fault path, and is evaluated by the EDS… insulation fault locators. When the locating current in the measuring current transformer exceeds the response value, the associated alarm LED at the EDS47… lights up indicating the faulty subcircuit. This information is also indicated on the LC display of the IRDH575. By assigning the measuring current transformers to the respective circuit, the point of fault can easily be detected.

Please contact Sunny sales@xiongbagk.cn for the best price.

➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
➱ Skype/WeChat: 18059884797
➱ phone/Whatsapp: + 86 18059884797
➱ QQ: 3095989363
➱ Website:www.sauldcs.com

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