WEG RW27-1D3-D004 - OVERLOAD RELAY RW27-1D3-D004
WEG

RW27-1D3-D004

Alternate Item Number: 10045630

UPC: 7890355027356

Contact for Pricing

Overview

The **WEG RW27-1D3-D004 thermal overload relay** is a critical component in industrial motor protection systems, engineered to safeguard motors from thermal damage caused by sustained overcurrent conditions. Unlike conventional circuit breakers that prioritize wiring protection, this relay is specifically calibrated to monitor motor current and interrupt the circuit when current exceeds safe levels for an extended duration. This proactive approach prevents motor burnout, extends equipment lifespan, and minimizes costly unplanned downtime in industrial operations. Designed for compatibility with WEG motor control systems, the RW27-1D3-D004 is a **class 10 thermal overload relay** that provides precise protection tailored to the motor’s full-load amperage (FLA). Its adjustable trip settings allow engineers to fine-tune protection levels, ensuring optimal performance across a wide range of motor applications—from pumps and compressors to conveyors and HVAC systems. The relay’s thermal sensing mechanism mimics the motor’s natural heat dissipation characteristics, enabling accurate detection of overload conditions before thermal damage occurs. **Key Features and Benefits:** - **Thermal Sensing Technology:** Utilizes a bimetallic strip or thermal element to detect sustained overcurrent, triggering a trip before motor windings overheat. This method is more reliable than instantaneous current-based tripping for protecting motors from thermal stress. - **Adjustable Trip Range:** Offers flexibility to match the relay’s tripping characteristics to the specific FLA of the connected motor, ensuring precise protection without nuisance tripping. - **Class 10 Trip Class:** Designed for applications requiring a 10-second trip delay at 6 times the rated current, making it ideal for motors with high inrush currents during startup. - **Compact and Durable Design:** Built to withstand harsh industrial environments, with robust construction that resists vibration, dust, and moisture—common in manufacturing plants, mining, and oil & gas facilities. - **Easy Installation and Maintenance:** Features a modular design for quick mounting on contactors or motor starters, with clear markings for straightforward calibration. WEG’s relays are engineered for minimal maintenance, reducing lifecycle costs. **Industry Applications and Use Cases:** The RW27-1D3-D004 is widely deployed across industries where motor reliability is paramount. In **manufacturing**, it protects motors in CNC machines, robotic arms, and assembly lines from overloads caused by mechanical jams or excessive loads. **Water and wastewater treatment plants** rely on it to safeguard pumps and aerators, where continuous operation is critical. The **HVAC industry** uses thermal overload relays to protect compressors and fans from damage due to refrigerant leaks or blocked airflow. In **mining and quarrying**, the relay ensures the longevity of conveyor motors and crushers, even in dusty, high-vibration conditions. **Why Choose WEG for Motor Protection?** WEG is a global leader in electric motor and automation technology, with over 70 years of expertise in designing solutions for industrial applications. The RW27-1D3-D004 is part of WEG’s comprehensive portfolio of motor protection devices, which are trusted by engineers worldwide for their reliability, precision, and durability. WEG’s relays are tested to international standards (IEC, UL, and CSA), ensuring compliance with global safety and performance requirements. Additionally, WEG’s global distribution network and technical support provide customers with seamless access to replacement parts, calibration services, and expert guidance. **Selection and Installation Best Practices:** When selecting an overload relay, professionals consider the motor’s **service factor, ambient temperature, and duty cycle**. The RW27-1D3-D004 is ideal for motors with a service factor of 1.15 or higher, operating in ambient temperatures up to 55°C. For installation, ensure the relay is mounted in a location with adequate ventilation and away from heat sources. Calibration should be performed using a multimeter to verify the trip current matches the motor’s FLA, typically set between 95% and 105% of the rated current. Regular inspections of the relay’s contacts and thermal elements are recommended to maintain optimal performance. **Conclusion:** For industrial operations where motor reliability directly impacts productivity and profitability, the **WEG RW27-1D3-D004 thermal overload relay** delivers unmatched protection and peace of mind. Its advanced thermal sensing, adjustable trip settings, and rugged construction make it a trusted choice for engineers and maintenance teams across diverse industries. By preventing thermal damage and reducing downtime, this relay not only protects your motors but also safeguards your bottom line.
  • Class 10 thermal overload relay for precise motor protection
  • Adjustable trip settings to match motor full-load amperage (FLA)
  • Thermal sensing technology prevents motor burnout from sustained overcurrent
  • Compact, durable design for harsh industrial environments
  • Easy installation and maintenance with modular mounting options

Specifications

Package Weight (Imperial)
0.363 LB
Power supply for DIN-rail

PS-60

Power supply for DIN-rail
N3 SCREW COVER - 10X10X6 - GRA

C3SC10106GY

N3 SCREW COVER - 10X10X6 - GRA
ACS380 AC Drive, 3-380-480V In, 3HP, 6A, Type OPEN, 1.5 overload, Integrated, HxWxD 6.69x2.76x7.52 in, Module

ACS380-040S-07A2-4

ACS380 AC Drive, 3-380-480V In, 3HP, 6A, Type OPEN, 1.5 overload, Integrated, HxWxD 6.69x2.76x7.52 in, Module
BK63H 1P B2A 10kA 120/240VAC UL1077

0626030563

BK63H 1P B2A 10kA 120/240VAC UL1077
MC-50a AC120V 50/60Hz SCREW 1a1b (Metasol) EXP (MC50A-30-11-K7-S-E)

1338006700

MC-50a AC120V 50/60Hz SCREW 1a1b (Metasol) EXP (MC50A-30-11-K7-S-E)
Combine high performance with compact dimensions: - 1000 V AC / DC IEC 600 V UL, - Opt for the best marking visibility thanks to the up-front, flat marker zone, which lets you mark up to eight digits or increase the font size.

1SNK705010R0000

Combine high performance with compact dimensions: - 1000 V AC / DC IEC 600 V UL, - Opt for the best marking visibility thanks to the up-front, flat marker zone, which lets you mark up to eight digits or increase the font size.
Pushbuttons. 104P heavy duty Oiltight Pushbutton. Nameplate. XN1B PR.No. CR100699

CR104PXN1B

Pushbuttons. 104P heavy duty Oiltight Pushbutton. Nameplate. XN1B PR.No. CR100699
General Electric Control Products. Nema Power Devices. Ol Relay 610F8364

CR324E610F

General Electric Control Products. Nema Power Devices. Ol Relay 610F8364
C.BREAKER TMAX XT2N 125 UL/CSA FIXED THREE-POLE WITH FRONT TERMINALS AND THERMOMAGNETIC RELEASE TMA R 90 I3=450...900 A

XT2NU3090BFF000XXX

C.BREAKER TMAX XT2N 125 UL/CSA FIXED THREE-POLE WITH FRONT TERMINALS AND THERMOMAGNETIC RELEASE TMA R 90 I3=450...900 A
The NNC75X75WH2 Halogen-Free Wide Slot Wiring Duct is used to route, protect, and manage wires near sensitive electronic equipment and in environments where heat resistance or public safety is a concern. UL 94 flame class of V-0 with a UL recognized continuous-use temperature up to 95 C (203 F). Halogen-Free, Polyphenylene Oxide (PPO). Mounting holes provided. 2.85" x 2.97" (72.4 mm x 75.4 mm) and 6.6' (2 m) long. Cover included. Color White. 5 pieces per package.

NNC75X75WH2

The NNC75X75WH2 Halogen-Free Wide Slot Wiring Duct is used to route, protect, and manage wires near sensitive electronic equipment and in environments where heat resistance or public safety is a concern. UL 94 flame class of V-0 with a UL recognized continuous-use temperature up to 95 C (203 F). Halogen-Free, Polyphenylene Oxide (PPO). Mounting holes provided. 2.85" x 2.97" (72.4 mm x 75.4 mm) and 6.6' (2 m) long. Cover included. Color White. 5 pieces per package.
DS9 RECEPTACLE POLY BLUE SIZE 5 IP 66/67/69 3P+G 150 A 480 VAC 60 Hz

3194213000K04

DS9 RECEPTACLE POLY BLUE SIZE 5 IP 66/67/69 3P+G 150 A 480 VAC 60 Hz
HPS Open Style Control Transformer, 150VA 240x480V-120x240V 50/60Hz

C2G0150MQMJ

HPS Open Style Control Transformer, 150VA 240x480V-120x240V 50/60Hz

Frequently Asked Questions about WEG

What certifications and standards do WEG products comply with?

WEG products meet extensive international standards across multiple critical categories, including safety, electromagnetic compatibility (EMC), functional safety, and regulatory compliance. Key certifications include UL, cUL, CE, TÜV Rheinland, and compliance with international standards such as EN 61800 series, IEC 61508, ISO 13849-1, and directives like Low Voltage (2014/35/EU), EMC (2014/30/EU), and RoHS. Their products are certified for safe operation in various industrial environments, with specific standards covering electrical safety, thermal performance, electromagnetic immunity, and environmental protection.

What is WEG's warranty policy?

WEG offers an 18-month standard warranty for automation products, covering defects in workmanship and materials. The warranty requires proper transportation, handling, storage, and installation within specified environmental conditions. Repairs must be performed by authorized WEG service, and the warranty is limited to the replacement or repair of the product itself, excluding consequential damages. Extended warranty options are available, including purchasing additional coverage at 2.5% of the product's selling price per year, up to 4 additional years.

What industries and applications are WEG products used for?

WEG products are extensively used across multiple industrial sectors, including packaging equipment, material handling, food processing, pumps, medical/lab equipment, door/gate openers, office machinery, and lawn/garden applications. Their versatile DC motors and variable frequency drives (VFDs) are designed for general industrial use, with solutions ranging from off-the-shelf products to custom OEM designs that meet UL/CSA standards for diverse manufacturing and processing environments.

What technical support does WEG offer?

WEG offers comprehensive technical support through multiple channels, including a dedicated Automation Service Department accessible via toll-free phone (1-877-934-3748) and email ([email protected]). They maintain a global network of accredited service centers worldwide, which customers can locate on their website. Additionally, WEG provides warranty support and technical assistance for their industrial automation products, with pre-approval required for warranty repairs.

What are the key features of WEG products?

WEG products feature advanced industrial automation technologies with key characteristics including high performance, flexibility, and connectivity. Their flagship CFW900 Variable Speed Drive demonstrates core product strengths: intelligent thermal management, built-in safety functions, IoT readiness, advanced energy saving capabilities, and comprehensive communication protocols. WEG drives offer robust performance with features like 150% overload capacity, modern graphic HMI, plug-and-play expansion modules, and compatibility across multiple industrial segments including food and beverage, pulp and paper, and manufacturing.

What communication protocols do WEG products support?

WEG products support multiple industrial communication protocols across their product lines, including EtherNet/IP, Modbus-TCP, Modbus-RTU, CANopen, and optional protocols like Profibus-DP and DeviceNet. Specifically, the PLC500 offers 2x Gigabit Ethernet Ports, 1x CAN Port, and 1x RS485 port, enabling seamless integration with major industrial communication networks.

What environmental ratings do WEG products have?

WEG products feature multiple environmental ratings and protection classes. They offer Protection Class 3C2 as a standard coating and Protection Class 3C3 as an optional extra coating, both compliant with IEC 60721-3-3. Environmental specifications include air relative humidity from 5% to 95% non-condensing, altitude ratings up to 1,000m standard (with current derating above that), and Pollution Degree 2 classification with non-conductive pollution requirements.

What accessories are available for WEG products?

WEG offers a comprehensive range of accessories across multiple product lines. For variable frequency drives like the CFW900, accessories include I/O expansion modules, communication modules, encoder modules, temperature transducer modules, relay output modules, and HMI accessories. These accessories expand communication capabilities, input/output functions, and application flexibility. Most accessories are interchangeable between drive frames and can be installed in backplane slots, with communication network accessories limited to one per variable speed drive.

What are the main product lines offered by WEG?

WEG offers a comprehensive range of industrial automation products, including variable frequency drives (CFW series like CFW100, CFW300, CFW500), soft starters (SSW series including SSW05, SSW07, SSW900), and the innovative Motion Fleet Management (MFM) system for predictive maintenance and asset monitoring. Their product lines are designed to support industrial automation needs across various sectors, providing solutions for motor control, fleet management, and operational efficiency.

How are WEG products typically installed?

WEG products are typically installed with careful attention to mounting specifications, protection ratings, and airflow requirements. For variable speed drives like the CFW900, installation methods include surface mounting, flange mounting, and side-by-side configurations with specific clearance guidelines. Installers must follow precise dimensional requirements for each product frame size, ensuring proper ventilation and electrical connections.