GE CR306G004XBNA

Equipment Description

The GE CR306G004XBNA is a heavy-duty magnetic starter designed for industrial motor switching applications. It belongs to GE’s CR306 series and uses full-voltage starting technology to connect three-phase motors directly to their power supply.

A key part of its design is the combination of an electromagnetic contactor and a three-leg thermal overload relay. This arrangement provides both motor control and protection against sustained overload conditions.

Operating Characteristics

The CR306G004XBNA uses a 460–480 VAC control coil. When the control circuit is energized, the magnetic assembly operates the contactor and closes the three main power contacts.

During normal operation, current flows through the starter to the motor. If an overload develops, the thermal relay responds and trips the control mechanism. The manual reset function helps prevent unexpected automatic restarting after a trip.

Main Product Data

• Manufacturer: GE
• Model Number: CR306G004XBNA
• Product Category: NEMA Magnetic Motor Starter
• Product Series: CR306
• NEMA Size: 5
• Rated Current: 270 A
• Main Poles: Three
• Control Coil: 460–480 VAC
• Maximum System Voltage: 600 VAC
• Operating Frequency: 50/60 Hz
• Overload Mechanism: Three-Leg Thermal Relay
• Mounting Style: Open Type

Design and Functional Advantages

Reliable Magnetic Switching

The electromagnetic contactor provides controlled switching of the motor’s main power circuit. Its design supports repeated starting and stopping in industrial applications.

Three-Phase Overload Protection

The integrated thermal overload arrangement monitors the three motor phases and helps protect against prolonged excessive current.

Encapsulated Coil

The encapsulated coil provides an enclosed construction for the magnetic operating assembly.

Manual Reset Function

The overload relay incorporates a manual reset arrangement and visual trip indication, helping maintenance personnel identify a protection event before returning the motor to service.

Industrial Uses

This GE magnetic starter is suitable for applications requiring high-capacity motor control, including industrial pumps, compressors, processing equipment, ventilation systems, and manufacturing machinery.

It can also be incorporated into motor control centers, switchgear assemblies, and customized electrical control panels.

Maintenance Considerations

Inspect the contactor and overload relay regularly for mechanical wear, contact deterioration, loose wiring, and abnormal heating. Confirm that the selected overload heater elements match the motor’s full-load current and that the control circuit follows the correct wiring diagram.

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