GE CR305E002AALH | Replacement 300-Line Motor Contactor

Description

• Brand: GE
• Full Model Number: CR305E002AALH
• System/Series Family: GE 300-Line Motor Control
• Core Function: Three-pole non-reversing magnetic contactor for motor switching applications
• Top 3 Hardcore Specs: NEMA Size 3; 3-pole; 115–120 VAC coil
• Contact Configuration: 1 NO auxiliary
• Current Rating: 90 A full-load current
• Voltage Rating: 600 V
• Frequency: 50/60 Hz
• Stock Status: New Surplus / Factory-Sealed or Fully Tested Refurbished subject to actual inventory condition

The CR305E002 family is documented as a GE 300-Line, NEMA Size 3, three-pole non-reversing contactor with a 115–120 VAC coil and 1 NO auxiliary contact. The CR305E002AALH designation is also identified specifically as a GE contactor, with the model reported as discontinued.

Module 3: Technical Product Introduction

When a large motor will not energize, trips immediately, or produces excessive contact heating, the contactor deserves attention alongside the overload relay and upstream control circuit. The GE CR305E002AALH is a NEMA Size 3 magnetic contactor from the GE 300-Line motor-control family. Available technical records identify the CR305E002 configuration as a three-pole, non-reversing contactor with a 115–120 VAC coil, 90 A full-load current rating, 600 V voltage rating, and one normally open auxiliary contact.

This is electromechanical switching hardware, so the coil circuit and power contacts must be evaluated separately. A measured 120 VAC control signal does not by itself prove that the contactor is healthy; inspect coil pickup, contact resistance, mechanical movement, terminal condition, and contact wear. The CR305E002AALH is reported as discontinued, making exact identification especially important when servicing older 300-Line motor-control equipment.

Module 4: Application Scenarios & Field Realities

• For large three-phase motor starters, the CR305E002AALH provides the main switching function between the incoming power circuit and motor. If the coil energizes but the motor receives uneven phase voltage, inspect the three main contacts rather than immediately replacing the motor.
• In chiller and fan motor applications, this contactor can be used where a substantial motor load requires a NEMA Size 3 switching device. One industry parts catalog specifically identifies CR305E002AALH as a chiller fan motor contactor.
• During preventive maintenance, measure contact condition under de-energized conditions and inspect for pitting, discoloration, mechanical binding, and loose power terminals. Contact wear can progress without producing an obvious control-system alarm.
• When troubleshooting a no-start condition, verify the control voltage at the coil terminals while the start command is active. If approximately 120 VAC is present but the armature does not pull in, the coil or mechanical mechanism becomes a primary suspect. If coil voltage is absent, investigate the upstream control circuit instead.

GE CR305E002AALH

Module 5: Migration, Compatibility & Installation Traps

Replacement Matrix

Field Traps — Watch Out

1. Coil voltage is a critical matching parameter.
The documented CR305E002 configuration uses a 115–120 VAC coil. Do not substitute a contactor simply because its current rating is similar. A different coil voltage can prevent pickup or damage the control circuit.

2. Do not confuse full-load current with every possible motor rating.
The published specification lists 90 A full-load current and a 600 V rating, while motor HP capability varies with voltage and phase configuration. Confirm the actual motor nameplate, application duty, and applicable electrical code before selecting a substitute.

Installation note: Isolate and verify absence of voltage on both the power and control sides before replacing the contactor. Label L1/L2/L3 and T1/T2/T3 connections before removal. After installation, verify phase-to-phase and phase-to-ground measurements before connecting the motor.

Module 6: Quality Assurance SOP

For the , testing should cover both the 120 VAC coil circuit and the three main power-contact paths.

• Part-number verification: Confirm on the nameplate and purchasing record.
• OEM anti-counterfeit visual inspection: Check GE markings, catalog number, frame designation, labels, molded components, coil assembly, and contactor construction.
• Mechanical inspection: Examine the enclosure, mounting points, armature, springs, contact carriers, terminals, and auxiliary-contact mechanism.
• Coil inspection: Verify the coil identification against the required 115–120 VAC configuration.
• Coil resistance test: Measure coil resistance and compare against the applicable engineering/service specification.
• Power-on self-test (POST): Apply the documented control voltage through a controlled test circuit and verify clean mechanical pickup and dropout.
• Contact continuity verification: Confirm all three main poles change state correctly when the coil is energized.
• Contact-resistance verification: Measure each closed main contact for abnormal resistance or significant imbalance.
• Auxiliary-contact verification: Test the documented 1 NO auxiliary contact for correct open/closed operation.
• Mechanical cycling: Perform repeated controlled pickup/dropout cycles and check for sticking, excessive noise, or delayed release.
• Insulation verification: Perform the appropriate insulation/withstand testing according to the applicable service procedure and equipment rating.
• Communication handshake verification: Not applicable as a standalone contactor; instead, verify the control-circuit command path and auxiliary-contact feedback where used.
• Final inspection: Recheck terminals, contact surfaces, coil assembly, mounting hardware, labels, and protective packaging.
• Traceability: Record the complete catalog number, coil configuration, visible manufacturing information, test measurements, inspection date, and condition classification.

Procurement note: The should be quoted using the complete suffix, not simply “GE CR305.” The base CR305E002 family has multiple application and configuration details, while the AALH designation identifies a specific version. Available records also indicate that this exact part is discontinued, so condition and exact configuration should be confirmed before shipment.