Noark 400A 750VDC 3Pole MCCB - 852724 (Ex9MD3B)

Overview

The Noark EX9MD 750VDC 3 Pole MCCB Circuit Breakers are engineered for high-current, high-voltage DC battery applications. Primarily used on large battery banks, the EX9MD range provides a robust and serviceable protection solution compared to conventional NH fuse bases.

Featuring advanced arc extinguishing technology, reduced manual operating force, and flexible installation options, these MCCBs are well suited to modern energy storage systems requiring reliable DC isolation and protection at higher current levels.

Key Features

High-Voltage DC Protection

• Rated at 250V DC per pole (3-pole configuration = 750V DC)
• Designed for demanding high-power DC battery systems
• High breaking capacity for safe interruption of DC fault currents

Advanced Safety & Design

• Patented arc extinguishing technology for reliable DC switching
• Patented mechanism reduces manual operating force
• Energy-efficient and environmentally friendly construction

Installation Flexibility

• Busbar connection capability
• Lug line/load side connections
• Plug-in and rear connection options
• Supports field-installable accessories

Trip & Configuration Options

• Available with fixed or adjustable trip setting units
• Compact modular MCCB design

Frame Sizes

• 315A – 400A: 140 × 225 × 172 mm
• 500A – 800A: 195 × 300 × 142 mm