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Allen Bradley

Allen Bradley 81001-451-83-R Thermal Overload Relay

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ManufacturerAllen Bradley

Part number81001-451-83-R

Type Thermal Overload Relay

Max Adjustable Current 83A

Reset Manual/Auto

Phase Loss Protection Yes

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Adjustable trip current up to 83A Thermal overload sensing Phase unbalance detection Manual and auto reset capability Heavy-duty industrial design

Product description

The Allen Bradley 81001-451-83-R is a thermal overload relay designed for robust motor protection in industrial settings. It features an adjustable trip setting with a maximum of 83A, enabling precise calibration for a variety of motor sizes. This relay provides essential protection against overcurrent and phase unbalance.

This overload relay is vital for the longevity of industrial motors, commonly found in applications such as large machinery, material handling systems, and heavy-duty processing equipment. By detecting and responding to fault conditions, it prevents motor burnout and associated costly repairs and downtime.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Allen Bradley 81001-451-83-R. We are dedicated to providing reliable, tested surplus components, ensuring you have access to the parts you need to maintain operational efficiency and minimize business interruptions.

Technical specifications

Type	Thermal Overload Relay
Max Adjustable Current	83A
Reset	Manual/Auto
Phase Loss Protection	Yes
Manufacturer	Allen Bradley

Common applications

Motor protection

Industrial motors

Heavy equipment

Processing machinery

Material handling

Pump applications

Compatible systems

Allen Bradley motor starters Industrial control panels Three-phase power systems

Also known as

Allen Bradley Overload Relay 83A 81001 Series Thermal Relay High AMP overload protector

Replaces / compatible with

Compatible with Allen Bradley motor starters and control systems requiring an 83A adjustable thermal overload relay. Please consult specific starter documentation for full compatibility.

Technical note

Expert tip

It is critical to set the overload trip point accurately to the motor's FLA to ensure reliable protection against both minor prolonged overloads and significant short circuits.

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Frequently asked questions

Can the 81001-451-83-R be reset automatically?

Yes, the Allen Bradley 81001-451-83-R thermal overload relay offers both manual and automatic reset options. Automatic reset can be enabled for applications where continuous operation after a temporary overload is desired, but manual reset is often preferred for safety.