Technical Specifications

• Product Series: Ex9M3S Series MCCB
• Component Type: Thermal-Magnetic Trip Unit
• Number of Poles: 2
• 2 pole mechanism in a 3 pole frame
• IC Class: S Rated Current: 300A
• Part Number: 1100317

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: 2

Functions

Provides overload and short-circuit protection for high-current two-pole electrical systems and industrial power applications.

Description

The Noark Ex9M3S M3S300T2L specifications include a 300A 2 pole thermal magnetic trip unit built with a 2 pole mechanism in a 3 pole frame configuration. The breaker features high interrupting capacity, patented arc extinguishing design, and compact modular construction. The bearing-type spindle reduces the operating force required to open and close the operating mechanism.

The breaker includes fixed and adjustable trip unit settings and standard line/load cable lugs for industrial installation flexibility. Advantages High interrupting capacity Patented arc extinguishing technology Compact modular construction Reduced operating force design Adjustable trip functionality Industrial-grade protection performance 

FAQs:

What is a 2 pole vs 3 pole MCCB?

A 2 pole MCCB protects two electrical conductors, while a 3 pole MCCB protects three conductors typically used in three-phase systems.

What are common 300A 2 pole breaker applications?

A 300A 2 pole breaker is commonly used in commercial distribution panels, industrial single-phase systems, and high-current electrical protection applications.

How do I select a 300 amp 2 pole breaker?

When you are selecting, be sure to consider voltage requirements, available fault current, load type, conductor sizing, and application environment.