Brands Guides About
GE CR309B103 Magnetic Motor Starter - 240VAC Coil — main product image
GE

GE CR309B103 Magnetic Motor Starter - 240VAC Coil

GE CR309B103 Magnetic Motor Starter: Reliable Motor Protection The GE (General Electric) CR309B103 Magnetic Motor Starter provides dependable protection for 3-phase motor circuits. With a 240VAC coil voltage and NEMA Size 0 rating, this motor starter includes essential features such as overload ...

View price on Amazon
Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

GE CR309B103 Magnetic Motor Starter: Reliable Motor Protection

The GE (General Electric) CR309B103 Magnetic Motor Starter provides dependable protection for 3-phase motor circuits. With a 240VAC coil voltage and NEMA Size 0 rating, this motor starter includes essential features such as overload protection, visible trip indicator, and manual reset for enhanced safety and performance.

Specifications:

  • Item: Magnetic Motor Starter
  • NEMA Size: 0
  • Amps AC: 18 A
  • Coil Volts: 240V AC
  • Enclosure NEMA Rating: 1
  • HP @ 3 Phase - 240V: 3 hp
  • HP @ 3 Phase - 480V: 5 hp
  • Action: Reversing
  • Number of Poles: 3
  • Includes: Overload Relay
  • Starter Type: NEMA
  • Hz: 50/60
  • Standards: UL Listed/CSA Certified

Key Features

These reversing NEMA motor starters with thermal overloads have enclosures that protect their internal components from impacts, debris, and dust

Reversing motor starters invert current flow to allow motors to operate in forward and reverse directions

Thermal overloads, also known as heaters, prompt motor starters to break electrical connections with downstream equipment once a set temperature is reached to protect connected loads from overheating

They contain either bimetallic strips or melting alloy solder materials

When the current exceeds a predetermined threshold and temperatures rise, the material bends or liquefies, causing the thermal unit to break the circuit and cause the motor starter to break its power

Specifications

Brand
GE
Model Name
CR309B103 Magnetic Motor Starter
Coil Voltage
240VAC
Function
Reversing Motor Starter with Thermal Overloads
Protection Feature
Thermal Overloads (Heaters)

Pros & Cons

👍 Pros

  • The GE CR309B103 Magnetic Motor Starter is designed with thermal overloads, protecting connected motors from overheating.
  • These reversing motor starters allow motors to operate in both forward and reverse directions, offering operational flexibility.
  • Enclosures protect internal components from impacts, debris, and dust, contributing to the starter's longevity in industrial environments.
  • Thermal overloads utilize either bimetallic strips or melting alloy solder materials, ensuring a reliable circuit break mechanism.
  • The breaking of electrical connections upon reaching a set temperature provides crucial safety for downstream equipment.

👎 Cons

  • The specific NEMA size or horsepower rating for this magnetic motor starter is not provided, making it hard to assess its capacity.
  • The operating voltage is fixed at a 240VAC coil, which might not be suitable for systems with different control voltages.
  • While robust, the detailed specifications on the enclosure's IP rating or material are not available.
  • The description focuses on protection mechanisms but lacks information on motor control features like acceleration or deceleration.
  • As an industrial component, its installation and troubleshooting likely require specialized knowledge and adherence to electrical codes.

Frequently Asked Questions

A thermal overload protects a motor by sensing excessive current draw and temperature rise, then breaking the circuit to prevent the motor from overheating and sustaining damage.
The product description does not specify compatibility with single-phase motors; typically, three-phase starters are common in industrial applications, so this needs to be confirmed.
The "reversing" capability means the motor starter can invert the current flow to the motor, allowing it to change its direction of rotation, which is essential for applications requiring forward and reverse movement.
Thermal overload units often have adjustable settings for trip current, and they are typically replaceable, but specifics for this model are not detailed.
The enclosure is described as protecting internal components from impacts, debris, and dust, indicating a robust design, but its specific NEMA type or IP rating is not provided.

Related Products