{"product_id":"bender-ir470ly2-60-793v-insulation-monitor-for-ac-it-systems","title":"Bender RCMA470LY 30mA 3A Residual Current Monitor for TN TT Systems","description":"\u003cdiv\u003e\u003cspan\u003eThe RCMA470LY is an AC\/DC sensitive residual current monitor from Bender, part of the RCMA series. It is designed for earthed systems (TN and TT systems) to monitor DC fault currents or AC residual currents that may occur in the system.\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 measures via an external measuring current transformer and is largely unaffected by load current and rated system voltage. All phase conductors (including the neutral conductor, if present) must pass through the current transformer. The RCMA470LY is particularly suitable for loads containing six‑pulse rectifiers or smooth‑type single‑phase rectifiers, such as frequency converters and battery chargers. It provides an alarm without disconnecting the power supply in the event of an earth fault, effectively avoiding nuisance tripping associated with high sensitivity.\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· Measuring principle: AC\/DC sensitive, via external measuring current transformer\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Response value adjustment range: 30 mA … 3 A\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Residual current frequency range: 0 … 150 Hz\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Alarm outputs: Two independent SPDT alarm relays (pre‑warning and main alarm)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Indication: LED bar graph display showing the measured value as a percentage of the preset response value\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Response delay: Adjustable to avoid nuisance tripping due to transient conditions\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Fault memory: Selectable latching mode; alarm must be manually or power‑cycled reset after fault clearance\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Test\/Reset: Built‑in TEST\/RESET button; supports external test and reset push‑buttons\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Connection monitoring: Continuously monitors the connection to the external current transformer; triggers alarm immediately on connection error\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Analogue output: Optional analogue current signal output\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Protection class: Housing IP30, terminals IP20\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Mounting: DIN rail, width 36 mm (2 standard modules)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Dimensions: approx. 70 × 99 × 73 mm\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Sealable transparent cover: Prevents unauthorised parameter changes\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Operating mode: Selectable normally energised (working current) or normally de‑energised (idle current) operation\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· AC\/DC sensitive measurement – Monitors smooth DC, pulsating DC and AC residual currents, suitable for modern electrical systems with frequency converters, switch‑mode power supplies, EV chargers, etc.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Dual independent alarm values – Two independently adjustable response values for pre‑warning and main alarm, enabling staged alarming\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· LED bar graph display – Shows the current measured value as a percentage of the set response value, providing immediate visual status\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Connection monitoring – Continuously supervises the external measuring current transformer connection; alarms immediately on interruption, ensuring measurement integrity\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Fault memory – Selectable latching mode; alarm status remains until manually or power‑cycled reset after fault clearance\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Adjustable response delay – Independently adjustable response delay to prevent nuisance alarms due to system start‑up or transient disturbances\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· External measuring transformer – Measurement via external current transformer, unaffected by load current or system voltage; flexible installation\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· DIP switch and potentiometer configuration – Parameter setting via onboard DIP switches and potentiometers, no external programming tools required\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Self‑test and reset – Integrated TEST\/RESET button on the front panel; supports external push‑buttons for remote operation\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Analogue output – Optional analogue current signal output for remote monitoring and data integration\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Sealable transparent cover – Front cover sealable to prevent unauthorised parameter changes\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) – Designed for fault or residual current monitoring in earthed power supply systems\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Variable frequency drive systems – Monitoring DC and pulsating DC leakage currents generated by VFDs\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Photovoltaic systems – Residual current monitoring on the DC side of solar inverters\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Battery chargers and UPS systems – Monitoring earth faults in charging equipment and UPS containing six‑pulse rectifiers\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Laboratory equipment – Real‑time leakage monitoring for precision laboratory devices\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Construction site equipment – Residual current safety monitoring for mobile equipment and temporary power distribution\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Industrial power distribution – Earth fault pre‑warning in manufacturing plants and data centres\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Medical locations – Leakage current monitoring in operating theatres, ICUs and other critical areas\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Single‑conductor offline current monitoring – Monitoring currents in normally unenergised conductors (e.g., PE conductor, N conductor)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e· Refrigeration equipment – Leakage monitoring for cooling equipment storing valuable frozen goods\u003c\/span\u003e\u003c\/div\u003e","brand":"Bender","offers":[{"title":"Default Title","offer_id":44165868519512,"sku":null,"price":298.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/2799\/9320\/files\/RCMA470LY......jpg?v=1780382529","url":"https:\/\/gexufein.com\/products\/bender-ir470ly2-60-793v-insulation-monitor-for-ac-it-systems","provider":"Gexufein Automation","version":"1.0","type":"link"}