{"product_id":"bender-ir475ly-4-ac-793v-dc-480v-ac-230v-insulation-monitor-for-ac-dc-it-systems","title":"Bender isoRW425-D4W-4 AC\/DC 400V AC 100-240V DC 24-240V Insulation Monitor for Railway Systems","description":"\u003cdiv\u003e\u003cspan\u003eThe isoRW425-D4W-4 is an insulation monitoring device (ISOMETER®) from Bender, specifically designed for railway applications. It monitors the insulation resistance (R mode) or insulation impedance (Z mode) of unearthed AC, AC\/DC and DC main circuits (IT systems) with a rated system voltage of up to 3(N)AC, AC, AC\/DC or DC 0…440 V.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eThe device complies with the EN 50155 railway standard and is suitable for control circuits in railway vehicles. DC components present in 3(N)AC and AC\/DC systems do not affect the operating characteristics as long as a minimum load current of DC 10 mA flows. A separate supply voltage allows de‑energised systems to be monitored as well. The W version offers increased shock and vibration resistance (3K23; 3M12) and an extended operating temperature range of –40 °C … +70 °C.\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· Rated system voltage (Uₙ): 3(N)AC, AC, AC\/DC or DC 0…440 V, 15…460 Hz\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Supply voltage (Uₛ): AC 100…240 V (47…63 Hz) \/ DC 24…240 V\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Response value range (Rₐₙ₁ \/ Rₐₙ₂): 1…990 kΩ (two independently adjustable thresholds)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Max. permissible system leakage capacitance (Cₑ) in R mode: ≤ 300 μF\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Max. permissible system leakage capacitance (Cₑ) in Z mode: ≤ 1 μF\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Measuring principle: R mode (insulation resistance measurement) or Z mode (insulation impedance measurement for 50 Hz or 60 Hz)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Display: Multi‑function LCD display\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· LED indicators: AL1, AL2\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Alarm output: Two independent changeover contacts (K1, K2)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Communication interface: RS‑485 (galvanically isolated), supporting BMS, Modbus RTU and isoData protocols\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Protection class: Internal components IP30, terminals IP20\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Mounting: 35 mm DIN rail\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Operating temperature (W version): –40 °C … +70 °C\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Software version: D0418\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Standards compliance: IEC 61557‑8, DIN EN 50155, EN 45545‑2\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Order numbers: B71037000W (push‑wire terminals); B91037000W (screw‑type terminals)\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· Dual‑mode insulation monitoring: Switchable between R mode (insulation resistance) and Z mode (insulation impedance for 50 Hz or 60 Hz systems)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Automatic adaptation to system leakage capacitance: Automatically adapts up to 300 μF in R mode\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· System voltage measurement: Measures the rated system voltage (true RMS) with undervoltage and overvoltage detection\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· DC residual voltage measurement: Measures L+\/PE and L‑\/PE\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Two independently adjustable alarm thresholds: Response range 1…990 kΩ (Alarm 1, Alarm 2)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Device self‑test and connection monitoring: Automatic self‑test with connection monitoring\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Adjustable time delays: Start‑up delay, response delay and delay on release\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Fault memory: Activatable fault storage\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Password protection: Prevents unauthorised parameter changes\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· RS‑485 communication: Galvanically isolated, supporting BMS, Modbus RTU and isoData protocols\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Selectable N\/C or N\/O operation: Alarm relays configurable for normally closed or normally open operation\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· Railway vehicle control circuits: Compliant with EN 50155\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Industrial AC control circuits: Mechanical engineering, power plants, elevators, automation systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· AC control and auxiliary circuits: Compliant with DIN EN 60204‑1 (Electrical equipment of machines)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· AC auxiliary circuits: Compliant with DIN VDE 0100‑725\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Small AC IT systems: Lighting systems, mobile generators\u003c\/span\u003e\u003c\/div\u003e","brand":"Bender","offers":[{"title":"Default Title","offer_id":44267763040344,"sku":null,"price":343.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/2799\/9320\/files\/isoRW425-D4W-4......jpg?v=1782157653","url":"https:\/\/gexufein.com\/products\/bender-ir475ly-4-ac-793v-dc-480v-ac-230v-insulation-monitor-for-ac-dc-it-systems","provider":"Gexufein Automation","version":"1.0","type":"link"}