{"product_id":"bender-rcms490-d-1-dc-16-94v-ac-16-72v-10ma-10a-residual-current-monitor-for-tn-tt-systems","title":"Bender RCMS490-D-2 AC 70-276V DC 70-276V 42-460Hz 10mA-10A Residual Current Monitor for TN TT Systems","description":"\u003cdiv\u003e\u003cspan\u003eThe RCMS490-D-2 is a 12-channel residual current monitor designed for earthed systems (TN and TT systems) to monitor residual currents and fault currents in AC, DC and AC\/DC hybrid systems. The device performs non‑invasive measurements via external measuring current transformers and provides early warning when ground faults are detected. It complies with IEC 62020 and IEC 61557‑9 standards.\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· Order No.: B94053006\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Supply voltage: DC 70…276 V; AC 70…276 V, 42…460 Hz\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Measuring channels: 12 channels\/device\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Measuring principle: Pulsating DC sensitive (AC sensitive or AC\/DC sensitive can be achieved by selecting different current transformers)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Response ranges:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e  · AC\/DC sensitive (0…2000 Hz): 10 mA…10 A\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e  · Pulsating DC sensitive (42…2000 Hz): 6 mA…20 A\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Pre-warning value: 10…100%, min. 5 mA\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Response time: at IΔ = 1 × IΔn₂ ≤ 180 ms; at IΔ = 5 × IΔn₂ ≤ 30 ms\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Alarm outputs:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e  · 2 common alarm relays (changeover contacts)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e  · 12 independent channel alarm contacts (12 × 1 N\/O contact)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Adjustable time delays: Start-up delay 0…99 s, response delay 0…999 s\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Display: Backlit graphical LC display (7-segment display)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Communication interface: RS‑485, supports BMS protocol and Modbus RTU\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· History memory: 300 data records with date and time stamp\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Data logger: 300 data records per channel\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Harmonics analysis: Supports harmonics analysis, DC component analysis, total harmonic distortion (THD) analysis\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Mounting: 35 mm DIN rail mounting\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· Standards compliance: IEC 62020, IEC 61557‑9\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· 12 independent measuring channels: Monitors 12 separate circuits per device, each channel with its own alarm contact for quick fault location\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Flexible measurement type: Each channel can be independently configured as AC sensitive, pulsating DC sensitive or AC\/DC fully current sensitive by selecting the appropriate measuring current transformer\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· True RMS measurement: Ensures measurement accuracy even in harmonic-rich environments\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· High scalability: Up to 90 RCMS monitors can be connected via the BMS bus, expanding to 1080 measuring channels\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Fast parallel scanning: All channels are scanned in parallel for rapid response\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· History memory and data logger: Built-in history memory stores 300 time-stamped event records; data logger stores 300 measurement records per channel\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Harmonics analysis: Supports harmonics analysis, DC component analysis and total harmonic distortion (THD) analysis\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Continuous CT connection monitoring: Continuously monitors external current transformer connection status; alarms immediately on wire break\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· Preset function: Supports quick commissioning with preset function\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· Residual current monitoring in earthed systems (TN\/TT systems)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Residual current monitoring in fire‑hazard locations – monitors leakage currents that may cause fire\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Data centres – monitoring leakage currents in server racks to prevent unexpected shutdowns\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Medical locations – monitoring electrical safety in medical facilities\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Industrial automation – leakage monitoring on production line electrical systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Crane and lifting technology – earth fault monitoring for equipment\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Robotic welding systems – residual current monitoring for medium-frequency welding systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· N‑conductor overload monitoring – monitors neutral conductor overload caused by harmonics\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· PE conductor and equipotential bonding conductor current monitoring\u003c\/span\u003e\u003c\/div\u003e","brand":"Bender","offers":[{"title":"Default Title","offer_id":44224750059608,"sku":null,"price":2666.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/2799\/9320\/files\/RCMS490-D-1.jpg?v=1781204978","url":"https:\/\/gexufein.com\/products\/bender-rcms490-d-1-dc-16-94v-ac-16-72v-10ma-10a-residual-current-monitor-for-tn-tt-systems","provider":"Gexufein Automation","version":"1.0","type":"link"}