{"product_id":"bender-irdh275b-427-793v-650v-insulation-monitor-for-ac-dc-it-systems","title":"Bender IRDH275B-59327 793V 650V Insulation Monitor for AC DC IT Systems","description":"\u003cdiv\u003e\u003cspan\u003eThe IRDH275B-59327 is a high-performance insulation monitoring device from Bender, designed for unearthed AC, 3(N)AC, AC\/DC, and DC power systems (IT systems). It continuously monitors the insulation resistance of the main circuit and is suitable for modern power supply systems that contain rectifiers, frequency converters, thyristor-controlled DC drives, and directly connected DC components. The device complies with IEC 61557‑8.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eThe “B” in the type designation indicates the enhanced version, and “59327” is the hardware configuration code.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eEnhanced Features (B Version)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· History memory with real‑time clock – Stores up to 300 alarm messages with precise date and time stamps.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Electrically isolated RS‑485 interface (BMS protocol) – For data exchange with other Bender devices and integration into central monitoring systems and PLCs.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· ISOMETER® disconnecting relay (terminals F1\/F2) – Allows the device to be temporarily disconnected from the monitored IT system via an external control signal; suitable for coupled IT systems.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Isolated 0(4)…20 mA analog current output – Provides a signal proportional to the measured insulation value for connection to PLCs or SCADA systems.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· AMPPlus Measuring Principle – Uses Bender‘s patented AMPPlus measuring technology (European Patent EP 0 654 673 B1), delivering accurate insulation monitoring even in systems with extensive DC components and high leakage capacitances – including pure DC systems, systems with rectifiers, and those with variable‑frequency drives (VFDs).\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Automatic Adaptation to System Leakage Capacitance – Automatically adapts to the existing system leakage capacitance (maximum permissible ≤ 500 μF), optimising measurement time without manual adjustments.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Two Independently Adjustable Response Values – Features two separately adjustable alarm relays (Alarm 1 and Alarm 2), each configurable from 1 kΩ to 10 MΩ.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Two‑Line LC Display – Equipped with a clear two‑line LC display with backlight, showing real‑time insulation resistance, system leakage capacitance, and other parameters. Front‑panel keys (INFO, TEST, RESET, MENU, ESC, Arrow keys, Enter) enable easy operation.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Alarm Indicators – Front panel includes three LED indicators: AL1 LED (pre‑warning), AL2 LED (critical alarm), and System Fault LED.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Built‑In Self‑Test and Connection Monitoring – Automatic self‑test continuously verifies internal measuring circuits and system components. Connection monitoring supervises the integrity of the measuring leads. The TEST button can manually trigger a test.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· External Test and Reset Functions – Supports connection of an external test push‑button (normally open) and an external reset push‑button (normally closed). When the reset button terminals are open, fault messages are not stored.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Standby Contact – Includes a standby contact. When the contact is closed, insulation measurements stop.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· De‑Energised System Monitoring – Powered by an independent external supply, the device can monitor the system even when the main circuit is de‑energised.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Voltage Extension via Coupling Devices – Using Bender AGH series coupling devices, the nominal system voltage range can be extended to higher levels, e.g. DC 0…1760 V or 3(N)\/AC 0…7200 V.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Nominal system voltage (Uₙ): 3(N)AC 0…793 V; AC 0…793 V; DC 0…650 V\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Frequency range (fₙ): DC, 0.1…460 Hz\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Response value range (Rₐₙ₁ \/ Rₐₙ₂): 1 kΩ … 10 MΩ, two thresholds independently adjustable\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Maximum permissible system leakage capacitance: ≤ 500 μF\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Measuring principle: AMPPlus\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Response time: ≤ 5 s (at R_F = 0.5 × R_an and C_e = 1 μF)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Measurement accuracy: 1 kΩ … 1 MΩ: ±15 % ±1 kΩ; 1 kΩ … 10 MΩ: ±15 % ±0.1 MΩ\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Measuring voltage: ≤ 50 V\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Measuring current: ≤ 280 μA\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Alarm relays: Two independent changeover contacts, AC 250 V \/ 5 A\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Analog current output: 0(4)…20 mA, isolated\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Communication interface: RS‑485, electrically isolated, supporting BMS protocol\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Fault memory: 300 records with real‑time clock\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Disconnecting relay: Yes\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Standby contact: Yes\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Operating temperature: –10 °C … +55 °C\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Storage temperature: –40 °C … +85 °C\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Protection class: Terminals IP30, enclosure IP20\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Mounting: DIN rail (35 mm standard rail)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Weight: Approx. 0.55 kg\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Standards compliance: IEC 61557‑8, DIN EN 61557‑8\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eTypical Applications\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Industrial IT systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Medical locations (operating theatres, ICUs)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Marine and offshore applications\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· UPS and battery systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Photovoltaic and renewable energy systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Coupled IT systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Extended voltage applications (with AGH coupling devices)\u003c\/span\u003e\u003c\/div\u003e","brand":"Bender","offers":[{"title":"Default Title","offer_id":44110877720664,"sku":null,"price":1543.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/2799\/9320\/files\/IRDH275-435....._01143bc6-7bc0-4f54-9061-ea3415d2e196.jpg?v=1778881027","url":"https:\/\/gexufein.com\/products\/bender-irdh275b-427-793v-650v-insulation-monitor-for-ac-dc-it-systems","provider":"Gexufein Automation","version":"1.0","type":"link"}