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Allen Bradley

Allen Bradley 81001-451-82R Thermal Overload Relay

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ManufacturerAllen Bradley

Part number81001-451-82R

Type Thermal Overload Relay

Max Adjustable Current 82A

Reset Manual/Auto

Phase Loss Protection Yes

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Adjustable trip setting up to 82A Thermal overload protection Phase unbalance detection Manual/Auto reset options Robust industrial design

Product description

The Allen Bradley 81001-451-82R is a thermal overload relay designed to protect motors from overcurrent and phase failure. It offers an adjustable trip range up to 82A, providing flexibility for various motor sizes and applications. This relay is built for reliable operation in demanding industrial environments.

This overload relay is crucial for safeguarding industrial machinery powered by electric motors, including large pumps, compressors, and heavy-duty conveyors. Its adjustable setting allows for precise motor protection, preventing damage from sustained overloads or short circuits, thereby minimizing equipment failure.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Allen Bradley 81001-451-82R. We specialize in providing high-quality, tested surplus components, ensuring that you can find the essential parts needed to keep your industrial operations running smoothly and efficiently.

Technical specifications

Type	Thermal Overload Relay
Max Adjustable Current	82A
Reset	Manual/Auto
Phase Loss Protection	Yes
Manufacturer	Allen Bradley

Common applications

Motor protection

Industrial motors

Heavy machinery

Pump control

Compressor control

Conveyor systems

Compatible systems

Allen Bradley motor starters Industrial control panels Three-phase motor circuits

Also known as

Allen Bradley Overload Relay 82A 81001 Series Thermal Relay High current overload protector

Replaces / compatible with

Compatible with Allen Bradley motor starters and control systems needing an 82A adjustable thermal overload relay. Refer to starter documentation for precise compatibility.

Technical note

Expert tip

When setting the trip current, ensure it is calibrated to the motor's full load amperage (FLA) to provide effective protection without nuisance tripping.

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Frequently asked questions

What is the purpose of phase loss protection in the 81001-451-82R?

Phase loss protection in the 81001-451-82R detects when one or more phases of power are lost to the motor. This prevents single-phasing, which can quickly lead to motor damage and overheating.