Description

Noark 630 Amp EX9MD4B

The Noark Ex9MD4B is a high-performance, non-polarised Moulded Case Circuit Breaker (MCCB) engineered specifically for high-current DC applications. Designed as a more serviceable and reliable alternative to standard NH fuse bases, this unit is primarily utilized for the protection and isolation of large-scale battery banks.

Technical Specifications

• Part Number: 27020.

• Current Rating ($I_n$): 630A.

• Voltage Rating ($U_e$): 750V DC (total voltage across 3 poles).

• Configuration: 3-Pole (3P).

• Frame Size: Frame 4.

• Dimensions: $195\text{mm} \times 300\text{mm} \times 142\text{mm}$ ($L \times W \times H$).

• Compliance: Certified to EN 60947 standards.

Core Features and Performance

• High Breaking Capacity: Built to safely interrupt high-fault currents in DC circuits, providing robust protection for critical power infrastructure.

• Non-Polarised Operation: The non-polarised design simplifies installation by allowing current to flow in either direction, making it ideal for systems with bidirectional energy flow, such as battery storage.

• Flexible Installation: Engineered for versatile mounting and integration within industrial enclosures.

• Advanced DC Switching: Utilizes a multi-pole configuration to manage high voltages, rated at 250V DC per pole.

Serviceability and Accessories

The Ex9MD4B supports a range of field-installable accessories to enhance system monitoring and control:

• Monitoring: Compatible with AX21 Auxiliary Contacts (1NO/1NC) and AL21 Alarm Contacts for remote status indication.

• Safety & Control: Supports TCE 24 3P Terminal Shields for enhanced safety and ERH 24 Extended Rotary Handles for external operation.

• Protection Logic: Can be fitted with SHT 22 Shunt Releases (240V AC) or UVT 22 Undervoltage Releases (415V AC) for advanced protection schemes.