Quick Ship Enclosed Motor Starters

National Motor Starters manufactures a complete line of IEC Enclosed Motor Starters for 460 volt 3-phase AC motors up to 100 HP or 90 amps.

Ideal for various industrial and commercial applications, these motors provide reliable performance and protection for your motor systems.

Each unit includes:

Contactor
Adjustable Class 10 overload relay
460/120 volt control transformer
Hand-off-auto (HOA) selector switch
An external overload relay reset switch

All components are housed in a NEMA 1 (general purpose) enclosure with punch-out conduit openings for fast and easy installation. General-purpose enclosures prevent accidental contact between personnel and the enclosed equipment in areas with typical service conditions. They also protect against falling dirt.

Our IEC Enclosed Motor Starters offer reliable protection and control for your motors, ensuring they operate safely and efficiently. With features like an adjustable overload relay and an HOA selector switch, you can easily manage and safeguard your motors from damage. National Motor Starters, a trusted division of Palmer DCS, provides high-quality solutions tailored to your industrial and commercial needs.

Whether you need to control HVAC systems, pumps, conveyor belts, machinery, or power generators, our IEC Enclosed Motor Starters are designed to meet your requirements with durability and ease of use.

Choose National Motor Starters for dependable performance and superior protection for your motor systems.

FAQs

What are the functions of a motor starter?

A motor starter is used to start a motor safely, stop a motor safely, reverse the direction of a motor, and provide low voltage and overcurrent protection.

They play a crucial role in ensuring voltage supplied to motors, such as those in a commercial HVAC system, is correct and doesn't cause damage to the motor. National Motor Starters offers a plug and play solution. We simplify the process by integrating the starter into an enclosure with all necessary wiring. Our Quick Ship IEC complete units are more cost-effective to install than to attempting repairs.

What is a contactor?

The electrical contactor is used to make or break electrical connections in a circuit. In motor starters, it controls the power supply to the motor. It allows it to start, stop, and reverse as needed. It also ensures enough power distribution and prevents damage to your motor by managing the flow of electricity.

How does an overload relay work?

Overload relay is key to protecting your motor from overloading due to excessive current or overheating. The overload monitors the current going to your motor to check how much heat is being generated.

An overload can trip for various reasons: the motor might be running too hard, the starting current might last too long, or one of the power lines might be pulling more current than the others. When this happens, the overload relay trips, cutting off power to your motor to prevent any damage.

Overload relays come in different classes based on how quickly they respond. Class 10 relays trip within 10 seconds, Class 20 within 20 seconds, and Class 30 within 30 seconds, all at 600% of the relay's current rating. It’s important to choose the right relay for your motor's needs. For example, Class 10 relays are ideal for low resistance motors, while Class 30 relays are better for high resistance motors.

What is a control transformer?

The control transformer takes incoming voltage and converts it to a lower voltage suitable for controlling the operation of your motor starter. It provides power for control circuits, switches, and relays while isolating the control circuit from the main power supply for better efficiency. It also makes it safer for technicians to work on the equipment.

How does a Hand-Off-Auto (HOA) selector switch work?

The HOA selector switch lets operators manually control the motor (hand), set it to automatic operation (auto), or turn it off completely (off). This versatility allows you to easily and more flexibly manage motor functions to meet your operational needs more safely.

What is an external overload relay reset switch?

The external overload relay reset switch lets you manually reset the overload relay after it trips from too much current or overheating. It helps you quickly get your motor running again after fixing the problem that caused the overload. It reduces downtime and keeps everything running smoothly.

National Motor Starters manufactures a complete line of IEC Enclosed Motor Starters for 460 volt 3-phase AC motors up to 100 HP or 90 amps.

Ideal for various industrial and commercial applications, these motors provide reliable performance and protection for your motor...