Technical Specifications

Product Series: Ex9M3S Series MCCB Component Type: Thermal-Magnetic Trip Unit Number of Poles: 3 IC Class: S Rated Current: 300A Part Number: 1100367 Cable Lug Specifications (2) #3AWG to 250 kcmil AL or CU Wires – 90°C Interrupting Capacity 50kA at 600Vdc 65kA at 240Vac 42kA at 480Vac 18kA at 600Vac Additional Information Brand: Noark Noark Product Series: Noark Ex9M3S Number Of Poles: 3

Functions

This trip unit provides thermal overload protection and magnetic short-circuit protection for industrial power distribution and heavy electrical loads. 

Description

The Noark Ex9M3S M3S300T3L specifications include a 300A 3 pole thermal magnetic trip unit with high-breaking capacity and patented arc extinguishing technology. The breaker includes line side and load side cable lugs and features a bearing-type spindle to reduce operating force.

Its compact modular design supports industrial installations requiring dependable high-current protection, and fixed and adjustable trip settings ensure application flexibility. 

Advantages

• High-breaking capacity
• Arc extinguishing protection design
• Reduced operating force
• Compact modular construction
• Adjustable trip settings
• Standard line/load cable lugs
• Heavy-duty industrial protection 

FAQs:

What is a 300 amp circuit breaker used for?

A 300 amp circuit breaker is a high-capacity protective device that can safeguard your electrical systems. It is commonly used in industrial power systems with large machinery, electrical distribution panels, and high-current commercial requirements.

What are common Ex9M3 300A breaker heavy duty applications?

The Ex9M3 300A breaker is commonly installed in manufacturing facilities and large motor systems. It is also used for industrial automation equipment and commercial power distribution systems.

What are the benefits of thermal magnetic trip unit MCCB?

Thermal-magnetic MCCBs provide both overload and short-circuit protection, improving the safety of your electrical system while also protecting equipment for long-term use.