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Revalco RDT300 industrial automation product
Revalco RDT300 nameplate and hardware view
Revalco RDT300 product detail view

Revalco RDT300 Type A Earth Leakage Relay

Revalco / Protection Relays / Earth Leakage

RDT300 Type A Earth Leakage Relay

The Revalco RDT300 is a three-module Type A relay with selectable residual-current and trip-delay settings and a changeover output contact.

The supplied unit is marked for 230 V AC power. Confirm the exact nameplate designation, toroidal transformer, current threshold, delay and terminal wiring before replacement.

ModelRDT300
DeviceType A Earth Leakage Relay
Current Range30 mA to 30 A
DelayInstantaneous to 10 s
Supply230 V AC
Lead Time2-3 DAYS
Order check: send all side labels, transformer model, selected current and delay, power supply, terminal wiring, quantity and destination.
✓ Top Quality
⚡ Fast Delivery
◎ 24/7 Service
Inquire Now
  • Worldwide delivery
  • Delivery from stock
  • In stock really means in stock
  • No account required
  • Shipped from the China
Product Specifications
Manufacturer Re.Val.Co International
Item number RDT300
Country of Origin Italy
Lead Time 2-3 DAYS
After-Sales Support One-year warranty, please contact May
HS Code / Commodity code Please confirm the destination before shipping.
FAQ

Quotes are valid for 30 days from the day the quote is received unless stated otherwise at the time of quotation.

Yes,we offer one year warranty for all new products.

Yes. We worked with FEDEX/DHL/TNT/UPS/ allowing us to provide swift global delivery of parts to any corner of the world.

Normally 3-5 working days,some remote areas 5-7 days more.

Product information
01

Residual-Current Range & Trip Profile

The Revalco RDT300 unit shown is marked Type A with selectable IΔn thresholds from 30 mA to 30 A, selectable trip delay up to 10 seconds, 230 V AC power and one NC-C-NO output contact. The external transformer and wiring must be matched as part of the protection circuit.

ManufacturerRevalco
ModelRDT300
Product TypeEarth Leakage Relay
Residual Current30 mA to 30 A
Trip DelayInstantaneous to 10 s
OutputNC-C-NO, 10 A at 250 V
Supply230 V AC
Lead Time2-3 DAYS
Visible protection dataThe unit markings show Type A response, IP20 terminals, selectable current/delay switches and separate power, sensing and relay-output terminals.
Catalog-name checkRe.Val.Co's current official catalog lists related 1RDT3/RDT30K relay families rather than an exact RDT300 record. Confirm the complete installed nameplate before substitution.
02

Transformer, Supply & Trip-Setting Check

An RDT300 replacement must preserve the sensing transformer, residual-current threshold, delay, power supply and output-contact logic.

1. Verify the full identitySend every side of the installed relay so the exact RDT300 designation and supply marking can be reviewed.
2. Identify the transformerRecord the external toroidal transformer model, aperture, wiring and conductor arrangement.
3. Record current settingDocument the selected residual-current threshold before removing the existing relay.
4. Record trip delayCapture the selected delay and confirm whether the protection scheme requires instantaneous or delayed operation.
5. Map output contactsVerify the NC, common and NO terminal numbers and the downstream trip or alarm circuit.
6. Engineer any successorDo not treat a related 1RDT3 or RDT30K catalog model as a drop-in replacement without checking settings, transformer, supply, terminals and dimensions.
03

Buyer Questions for Revalco RDT300

Which residual-current settings are available on Revalco RDT300?The supplied unit markings show 30 mA, 100 mA, 300 mA, 0.5 A, 1 A, 1.5 A, 2 A, 3 A, 5 A, 10 A, 20 A and 30 A selections.
Which trip-delay settings are shown on Revalco RDT300?The selector provides instantaneous operation and timed settings from 0.25 seconds up to 10 seconds. Record the installed position before replacement.
What power supply is marked on this Revalco RDT300 configuration?The supplied unit has the 230 V AC power option marked. Verify the actual field voltage and terminal connection before energizing a replacement.
What relay output is marked on Revalco RDT300?The unit marking shows one NC-C-NO changeover contact rated 10 A at 250 V. Check the downstream trip or alarm load before wiring.
What enclosure protection is shown for Revalco RDT300?The terminal area is marked IP20. Install Revalco RDT300 inside a suitable control panel that provides the environmental protection required at the site.
Which Revalco RDT300 settings should be recorded before removing an installed relay?Record the residual-current threshold, time delay, 230 V AC supply terminals, NC-C-NO wiring and the connected transformer identification before disconnection.
04

About Company

Global sourcing and technical support worldwide.
Automation engineer inspecting an industrial control cabinet
Years of Global ExperienceWith 20+ years of industry experience, we serve customers worldwide and have built long-term relationships across the UK, Russia, UAE, India, Venezuela, and more.
Professional Support TeamOur experienced team provides reliable pre-sales and after-sales support, helping customers select suitable products and resolve purchasing concerns.
Wide Range of BrandsWe supply leading automation brands covering PLCs, DCS, I/O modules, drives, motors, power supplies, communication modules, and more.
Large In-Stock InventoryA wide range of products is available from stock, including discontinued, obsolete, and hard-to-find parts, helping reduce sourcing time.
Honesty & TrustWe value long-term cooperation and treat every customer with honesty, respect, responsibility, and care.
Your Trusted Automation PartnerFrom a single replacement part to complete automation projects, we are ready to support your needs and build a long-term partnership.
05

Transaction Cases

Sincere Cooperation, Long-Term Trust

RussiaA Russian customer urgently needed a replacement for a discontinued automation component. After reviewing the product label, technical parameters, and application details, our engineers recommended a compatible alternative and provided photos and test videos before shipment. The alternative performed well, enhancing the customer's confidence in our technical capabilities and leading to multiple repeat orders.
IndiaAn Indian customer still had doubts after initial online communication with us, so they visited our company in person for a face-to-face meeting and product inspection. This visit increased the customer's trust and led to the successful placement of their first order. Over the next few years, we completed multiple orders and established a stable, long-term partnership.
VenezuelaA Venezuelan customer needed a specific automation component and compared products and services from several suppliers online. After nearly three weeks of careful consideration, our sincere communication, professional service, and reliable product quality won the customer's trust. After receiving the product and using it for several weeks without any problems, the customer gave us positive feedback and subsequently placed multiple orders.
06

Mixed Automation Model References

Selected model references for multi-brand sourcing inquiries. Send the full label photo to confirm manufacturer, revision and configuration.

01  1756-L63
02  CC-PFB401
03  TU845
04  CC-PDOB51
05  CI853K01
06  SD834
07  AI843
08  6ED1055-1MB00-0BA2
09  TB541-ETH
10  6ES7336-1HE00-0AB0
11  6ED1055-1MM00-0BA2
12  SS823
13  6ES7518-4AX00-1AC0
14  AAI135
15  VE3012
16  6ES7521-7EH00-0AB0
17  AAP149
18  VE3008
19  6ES7221-1BH32-0XB0
20  AI523
21  1756-RM2
22  5069-L320ER
23  6ES7215-1BG40-0XB0
24  ADV559
25  6GK7177-1MA20-0AA0
26  ARM15A
27  6GK7243-5DX30-0XE0
28  DO821
29  6ES7288-1SR30-0AA1
30  6ED1055-1MA00-0BA2
31  5069-L310ER
32  CC-PCNT02
33  6ES7416-3FS07-0AB0
34  TC-FXX132
35  1756-L71
36  CC-PCNT03
37  6ES7288-5AQ01-0AA0
38  ADR541
39  5069-L310ERMS2
CONTACT

Send Your RDT300 Inquiry

Include all relay labels, transformer model, current and delay settings, supply, wiring, quantity, destination and required delivery date.

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