• new 1pcs BENDER Insulation Detector RCM420-D-1 - BENDER [1]
  • new 1pcs BENDER Insulation Detector RCM420-D-1 - BENDER [2]
  • new 1pcs BENDER Insulation Detector RCM420-D-1 - BENDER [3]
1 3

BENDER

BENDER Insulation Detector RCM420-D-1

BENDER Insulation Detector RCM420-D-1

$3,419.68 USD
$3,419.68 USD $3,419.68 USD
Sale Ausverkauft
Versand wird beim Checkout berechnet
Condition new
brand BENDER
model RCM420-D-1
features Compact design, high accuracy, automatic detection, reliable monitoring
product_type Insulation Detector
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Description


BENDER Insulation Detector RCM420-D-1

BENDER Insulation Detector RCM420-D-1 offers reliable and accurate insulation monitoring with its compact design and advanced detection features.

The BENDER Insulation Detector RCM420-D-1 is a compact and highly accurate device designed for efficient insulation monitoring. Built for reliability, this detector combines advanced technology with a user-friendly interface to provide quick and precise readings. Its compact design makes it ideal for use in various industrial settings, ensuring easy placement and optimal performance. The device features automatic detection modes, real-time monitoring capabilities, and clear display for easy interpretation of results.

BENDER RCM420-D-1 Insulation Monitoring Device — AC/DC Sensitive

BENDER · RCM Series · Ground-Fault Monitor · In stock

The RCM420-D-1 is a residual-current monitor (RCM) from the German manufacturer Bender that continuously watches insulation resistance and ground-fault current on ungrounded (IT) power systems, including AC, DC, and AC/DC mixed systems. It belongs to the RCM420 series — AC/DC-sensitive monitors commonly used in industrial, hospital, and renewable-energy installations where a clean ground reference must be guarded against leakage.

The "-D-1" variant is the panel-mount version with a digital display, configurable response value, and one Form-C alarm contact. KOEED stocks this BENDER insulation monitor for both new installation and maintenance of legacy factory automation panels where a Bender RCMA / RCM unit must be replaced.

Key Specifications

Brand Bender (Bender GmbH & Co. KG)
Series RCM420 (AC/DC-sensitive residual-current monitor)
Part Number RCM420-D-1
Function Residual-current / insulation monitoring on ungrounded (IT) systems
Type of Monitoring AC / DC / AC + DC sensitive (Type B characteristic per IEC 60755)
Nominal System Voltage 3(N)AC 0–400 V / 0–500 V (system-dependent, see nameplate)
Response Value IΔn Adjustable, typically 10 mA – 30 A (variant dependent)
Display Integrated digital indicator (D-version)
Alarm Output 1 × Form-C (SPDT) contact, configurable pre-warning / alarm
Mounting Panel / DIN-rail cut-out (1/1 variant)
Stock Status In stock — quote within 24 hours at Moritta@KOEED.COM

Datasheet Highlights

  • AC/DC sensitive Type B characteristic — detects smooth DC residual currents that classic Type A RCDs would miss, essential for variable-frequency drives and rectifier-fed DC loads.
  • Ungrounded (IT) system monitoring — supports the first-fault-continuity requirement of medical IT power systems and industrial isolated networks per IEC 60364-4-41.
  • Adjustable response value — pre-warning and main alarm thresholds can be set independently to give a two-stage escalation.
  • SPDT Form-C alarm contact — directly interfaces to PLC discrete inputs or building-management systems (BMS) for remote alerting.
  • Panel-mount form factor — the D-1 housing fits a standard cabinet cut-out and is wired to an external current-measuring CT loop on the protected conductor.

Typical Applications

  • Hospital operating-room isolated (IT) power systems and group 2 medical locations
  • Industrial process lines with frequency inverters and DC bus loads
  • Solar PV string monitoring, battery energy storage cabinets
  • EV charging infrastructure ground-fault detection
  • Rail and shipboard IT power distribution
  • Replacement of legacy Bender RCMA / RCM modules in existing switchgear

Related Modules & Cross-Reference

Same family (Bender RCM420) RCM420-D-1 · RCM420-D-2 · RCM420-L
Bender IR/iso monitor IR420-D6 · ISOMETER iso165C · RCMA423
External CT Bender W series current transformers (W0-S20, W1-S35, W2-S70) — select by cable/lug size
Browse related KOEED brands Schneider · Siemens · Omron · Allen-Bradley · Mitsubishi · Yaskawa · Panasonic · Fanuc · KEYENCE

Warranty & Authenticity

New and tested surplus Bender RCM420-D-1 units — sourced from decommissioned medical and industrial cabinets, bench-checked for response value, alarm contact continuity, and display function. Worldwide shipping with 24-hour quote turnaround on business days.

Need this RCM420-D-1 or a Bender / insulation-monitor BOM?

Send your part list to Moritta@KOEED.COM and get availability + price within 24 hours.

Request a Quote →

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About Koeed Automation

Expert Supply Solutions for Global Industrial Electronics

At Koeed.com, we are professional architects of the industrial electronics supply chain. We specialize in providing high-performance PLCs, HMIs, Servo Motors, Drives, and Converters to ensure that modern manufacturing operations remain efficient, reliable, and future-proof in 2026’s competitive landscape.

🛡️ Certified Quality

We source only 100% authentic industrial hardware from global category leaders. Every component undergoes a rigorous verification process to meet Industry 4.0 reliability standards.

⚙️ Engineering Domain

Our experts provide more than just parts; we offer technical insight. We assist in complex product selection and compatibility audits for both legacy system upgrades and new installations.

🌐 Rapid Global Logistics

Time is money in industrial automation. Our optimized supply network ensures that critical components reach your facility quickly, significantly reducing unplanned downtime and operational loss.

Strategic Global Portfolio: Siemens, Omron, FANUC, Schneider Electric, Mitsubishi, Yaskawa, Allen-Bradley, and other elite industrial brands.

Supporting your vision for a smarter, more efficient industrial future.

Alternative Names


  • BENDER Insulation Detector RCM420-D-2
  • BENDER Insulation Detector RCM420-D-3
  • BENDER Insulation Detector RCM420-D-4

Special Reminder

Important

If you have any questions about product information and prices, please feel free to contact us by email or WhatsApp. We will respond quickly.

  • Business Days Only (Monday through Saturday)
  • It takes up to 10 days from the time of ordering (excluding Saturdays and Sundays) to the time of delivery to your designated location. Worldwide delivery.
  • Within 3 days after placing the order, we will send you photos and videos of the product via email or WhatsApp for confirmation

International shipping - items may be subject to customs processing depending on the item's customs value.
Sellers declare the item's customs value and must comply with customs declaration laws.
As the buyer, you should be aware of possible:

  • Delays from customs inspection.
  • Import duties and taxes which buyers must pay.
  • Brokerage fees payable at the point of delivery.

Shipping Policy

Global Delivery

We ship to customers all over the world. Our primary logistics providers are DHL, UPS, TNT, FedEx, and EMS.

Processing Time

All orders are processed within 72 hours of purchase. Please note that this applies to business days only.

Shipping Rates & Delivery Estimates

Shipping charges for your order will be calculated and displayed at checkout. Delivery estimates are within 7-14 days. Please note that these shipping times are only estimates and unfortunately, cannot be guaranteed.

Shipment Confirmation & Order Tracking

You will receive a Shipment Confirmation email once your order has shipped containing your tracking number(s). The tracking number will be active within 24 hours.

Customs, Duties, and Taxes

Please note, international shipping services do vary from country to country. To find out the exact services that are available, please put in your full address at checkout. Shipping internationally does mean that you may be required to pay customs and import taxes. All international customers are responsible for the customs rates within their own country. For further information, we recommend contacting your local customs office.

Damages

We take every reasonable precaution to ensure that products are not damaged. If the item is damaged in transit, please immediately contact us. We are not liable for any products damaged or lost during shipping. If you received your order damaged, please contact the shipment carrier to file a claim. Please save all packaging materials and damaged goods before filing a claim.

Force Majeure

When encountering with force majeure, the processing of orders will be delayed. Nevertheless, it is ensured that your order will be processed in a fast manner when weather permits.

Address Verification

Please verify you have the correct shipping address on your order PRIOR to making payment as this is the address we will ship to.

Return Policy

For more information, visit our Return Policy page.

International shipping - items may be subject to customs processing depending on the item's customs value.

Sellers declare the item's customs value and must comply with customs declaration laws.
As the buyer, you should be aware of possible:
• Delays from customs inspection.
• Import duties and taxes which buyers must pay.
• Brokerage fees payable at the point of delivery.

Contact Us

If you have any questions about your order, please contact us at moritta@koeed.com.

Return Policy

Return and Refund Policy

We want you to be completely satisfied with your purchase on our store. If for any reason you are not entirely satisfied, we're here to help!

Returns

You have a generous 30 calendar days to return an item from the date you received it. To be eligible for a return, ensure the item is in its original, unworn, and unused condition with tags and packaging intact. Retain your receipt or proof of purchase for eligibility. Please note that certain items are non-returnable like perishables, custom products, personal care goods, hazardous materials, flammable liquids, and gases. Reach out for clarifications on specific items.

Return Process

Commence the return process by reaching out to us at moritta@koeed.com. Upon approval, we will furnish you with a return shipping label and detailed instructions for dispatching your package. Unnotified returns will not be accepted.

Damages and Issues

Kindly review your order upon delivery. Notify us promptly if it arrives defective, damaged, or incorrect. We will address the matter swiftly.

Exchanges

Facilitate a swift exchange by returning the original item once approved and making a new purchase.

EU 14-Day Cooling Off Period

EU-bound shipments allow a 14-day cancellation or return period without justification. Conditions mirror standard returns.

Refunds

Upon receiving and inspecting your return, we’ll inform you of the refund status. Approved refunds are automatically processed within 10 business days via the initial payment method. Allow time for financial institutions to finalize the refund. For delays exceeding 15 business days post-approval, contact us at moritta@koeed.com.

Shipping

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

Contact Us

If you have any questions on how to return your item to us, feel free to contact us at moritta@koeed.com.

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