ABB CA5X-22M Relay | Motor Protection, 2.8-4.5A AC-1, CT Input, DIN Rail Mount

ABB CA5X-22M Relay | Motor Protection, 2.8-4.5A AC-1, CT Input, DIN Rail Mount

ABB CA5X-22M motor protection relay specifications. Thermal overload, short circuit, 2.8-4.5A AC-1, CT input, 24-240V AC/DC supply, DIN rail mount.

Product Overview

The ABB CA5X-22M​ is a compact, self-powered motor protection relay​ from ABB's CA5X series, designed for the comprehensive protection of three-phase AC motors. It integrates thermal overload protection, short-circuit protection, phase failure protection, and motor temperature monitoring via PTC thermistors​ into a single device. The "22M" variant features a current transformer (CT) input​ for motor current sensing and operates over a wide auxiliary supply range of 24-240V AC/DC. It is a versatile and economical solution for safeguarding motors in industrial applications.

Technical Specifications

Note: Specifications are based on the ABB CA5X series general catalog. The exact trip class adjustment range and short-circuit multiplier are model-specific. Always verify with the latest product datasheet for the CA5X-22M.

Key Features

• Integrated Motor Protection:​ Combines thermal, magnetic, and phase failure protection in one unit

• Wide Supply Range:​ 24-240V AC/DC auxiliary supply for flexible installation

• Self-Powered:​ Operates from the motor's own current (via CT), requiring minimal external wiring

• PTC Thermistor Input:​ Direct connection to motor-embedded PTC sensors for direct temperature monitoring

• Trip Class Selection:​ Adjustable overload trip characteristic (e.g., Class 5, 10, 20, 30) via DIP switch

• Manual/Auto Reset:​ Configurable for manual (local/remote) or automatic reset after trip

• Visual Indication:​ LEDs for Status (GREEN), Trip/Overload (RED), Short-Circuit (RED)

• Compact Design:​ Saves panel space compared to traditional thermal overload relays + contactors

• Universal Mounting:​ DIN rail mount for easy installation

• Global Approvals:​ Compliant with major international standards

Protection Functions Detail

Relay Contact Configuration

Note: Contacts 95-96 (NC) and 97-98 (NO) for K1 may be reversed depending on the specific model's standard configuration. Always verify terminal labeling.

Terminal Designation (Typical)

LED Indicators

Selection and Application Guide

Critical: The motor's exact full-load current (FLC, I_M) from its nameplate must be used to set the relay's Ie current setting.

Typical Wiring Schematic (Simplified)

[3-Phase Supply] --> [Contactor] --> [Motor]
                          |
                     [Coil A1-A2]
                          |
CA5X-22M: K1 (95-96 NC)---'
        |
[CT Secondary] --> CA5X-22M (1/L1, 3/L2, 5/L3)
        |
[PTC Sensor] --> CA5X-22M (T1, T2)
        |
[Aux Supply] --> CA5X-22M (A1, A2)

Typical Applications

• Pump Control Panels:​ Protecting centrifugal and submersible pumps

• Fan and Blower Systems:​ HVAC and industrial ventilation

• Conveyor Drives:​ Motor protection on material handling systems

• Machine Tools:​ Lathes, mills, and other machinery

• Compressor Units:​ Protecting air compressor motors

• Mixers and Agitators:​ Process industry applications

Important Technical Notes

1. Current Setting (Ie):​ Must be set to the motor's exact full-load current (FLC)​ as stated on the motor nameplate, not the rated power.

2. Trip Class Selection:​ Choose the trip class (e.g., Class 10 for standard motors) matching the motor's start-up characteristics and application.

3. CT Connection:​ The relay uses a built-in current transformer. The motor cables must pass through the relay's integrated CT window or be connected to external CTs as per the specific model's design. Verify the wiring diagram for the CA5X-22M.

4. Auxiliary Supply:​ A wide-range 24-240V AC/DC supply is required for the relay's electronics. Ensure the voltage matches the available control voltage.

5. PTC Sensors:​ Only use PTC thermistors compatible with the relay's trip threshold. Connect 2 or 3 sensors in series.

6. Trip Relay Contact (K1):​ This must be wired in series with the contactor's coil circuit​ to interrupt power upon a fault.

7. Manual Reset:​ After a thermal overload trip, a manual reset (via button or remote contact) is typically required, allowing the motor to cool.

8. Short-Circuit Setting:​ Set the magnetic trip (F) above the motor's starting current but below the system's short-circuit capacity. A typical setting is 8-12 x Ie.

Note: This data sheet provides general specifications for the ABB CA5X-22M motor protection relay. For complete installation guidelines, wiring diagrams, detailed setting procedures, DIP switch functions, trip time curves, and safety instructions, consult the official ABB CA5X Series Technical Manual​ and the specific product data sheet. Always size and set the relay based on the protected motor's nameplate data.

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About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL and EMERSON to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

Frequently Ask & Questions

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One-year Warranty.

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