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Allen Bradley MSR238DP Motor Protection Relay with Differential Protection

Allen Bradley MSR238DP Motor Protection Relay with differential protection.

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ManufacturerAllen Bradley

Part numberMSR238DP

Type Motor Protection Relay

Model MSR238DP

Manufacturer Allen Bradley

Protection Differential, Thermal Overload, Phase Imbalance

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12-month warranty

All units tested

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Same-day dispatch

Order by 2pm CST

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Worldwide delivery

US, EU, Asia, Middle East

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Veteran-owned

CAGE: 9NK75

Differential protection Thermal overload protection Phase imbalance detection High-speed tripping Robust design for harsh environments

Product description

The Allen Bradley MSR238DP is a sophisticated motor protection relay offering advanced differential protection, combined with thermal overload and phase imbalance protection. This unit is designed for safeguarding critical, high-value motors against internal faults and external disturbances, ensuring maximum operational uptime and preventing catastrophic failures.

This relay is essential for heavy-duty motor applications in sectors such as power generation, petrochemical, mining, and large-scale manufacturing. Its advanced protection features make it suitable for critical drives where reliability and rapid fault response are paramount.

Stanlo Automation, a veteran-owned surplus parts distributor, provides the Allen Bradley MSR238DP. We are your reliable source for hard-to-find industrial automation components, offering cost savings and expert service.

Technical specifications

Type	Motor Protection Relay
Model	MSR238DP
Manufacturer	Allen Bradley
Protection	Differential, Thermal Overload, Phase Imbalance
Reset	Manual

Common applications

Power generation units

Petrochemical plants

Mining equipment

Large industrial drives

Critical manufacturing machinery

High-value motors

Compatible systems

Suitable for integration into complex protection schemes for critical motor applications.

Also known as

MSR 238DP, Allen Bradley MSR 238DP, Motor differential protection relay

Replaces / compatible with

Designed for applications requiring advanced differential protection for motors, complementing thermal and phase imbalance protection within the Allen Bradley MSR series.

Technical note

Expert tip

Accurate installation and matching of current transformers (CTs) for the MSR238DP's differential circuit are critical for proper operation and fault detection.

What happens next?

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Frequently asked questions

What is the purpose of the differential protection on the MSR238DP relay?

The differential protection feature on the MSR238DP compares the current entering and exiting the motor windings. Any significant mismatch indicates an internal fault within the motor, allowing the relay to initiate an immediate trip to prevent severe damage and potential system failure.