
Contact for Pricing
Overview
- Thermal overload relay for motor protection in industrial applications
- Bi-metallic strip technology detects sustained overcurrent conditions
- Class 10 trip characteristics with phase loss & current unbalance sensitivity
- Overload setting range: 32-40A, compatible with WEG contactors CWB9...38 & CWBN00...CWBN1
- Selectable reset (automatic or manual), includes 1NO & 1NC auxiliary contacts
- Compatible with WEG motor control centers and starters
- Durable construction for harsh industrial environments
- Reduces risk of motor burnout and costly downtime
Specifications
Series | RW27 |
Package Weight (Imperial) | 0.363 LB |

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
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.
XT2NU3090BFF000XXX
C.BREAKER TMAX XT2N 125 UL/CSA FIXED THREE-POLE WITH FRONT TERMINALS AND THERMOMAGNETIC RELEASE TMA R 90 I3=450...900 A
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.Frequently Asked Questions
Is the reset function automatic or manual?
The relay offers a selectable reset function, allowing users to choose between automatic or manual reset modes.
What is the overload setting range for this relay?
The overload setting range for the RW27-2D2-D008 is 32-40A.
How many poles does the RW27-2D2-D008 have?
The RW27-2D2-D008 has 2 poles.
What is the trip class of the RW27-2D2-D008?
The RW27-2D2-D008 features Class 10 trip characteristics, meaning it trips within 10 seconds at 600% of the rated current.
Does this relay protect against phase loss?
Yes, the relay includes phase loss and current unbalance sensitivity protection.
What type of auxiliary contacts are included?
The relay includes isolated 1NO (normally open) and 1NC (normally closed) auxiliary contacts.
What contactors is this relay compatible with?
The RW27-2D2-D008 is compatible with WEG contactors such as CWB9...38 and CWBN00...CWBN1.
What is the mounting type for this relay?
The RW27-2D2-D008 features direct mounting to WEG contactors without requiring additional accessories.
How to Install the WEG RW27-2D2-D008 Thermal Overload Relay
Step-by-step guide to install the WEG RW27-2D2-D008 thermal overload relay with WEG contactors.
Estimated time: 15m
Tools needed:
Screwdriver, Wire strippers, Multimeter
Supplies needed:
Mounting screws, Compliant wiring
- Prepare the contactor
Ensure the WEG contactor (e.g., CWB9...38 or CWBN00...CWBN1) is de-energized and safely disconnected from power.
- Mount the relay
Align the RW27-2D2-D008 relay with the contactor’s mounting points and secure it using the provided screws.
- Connect the power wires
Route the motor power wires through the relay’s terminals, ensuring proper torque (refer to WEG’s torque specifications).
- Connect auxiliary contacts
Wire the 1NO and 1NC auxiliary contacts to your control circuit, verifying correct polarity and isolation.
- Set the overload current
Adjust the overload setting to match the motor’s rated current (32-40A range) using the relay’s dial.
- Test the installation
Re-energize the system and verify the relay’s operation by simulating an overload condition (e.g., using a multimeter to check trip response).
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.









