HJ-MNS Series Premium Withdrawable

Up to 6300A / 100kA / Fully Modular MCC

The HJ-MNS Series Premium Withdrawable Switchgear is a highly versatile, modular low-voltage power distribution and Motor Control Center (MCC). Engineered with a robust C-profile frame and advanced hot-swappable withdrawable technology, it ensures maximum operational continuity, operator safety, and spatial efficiency for heavy-duty electrical networks.

Ideal for Continuous Process Industries:

✓ Power Plants & Major Substations
✓ Oil, Gas, Petrochemical & Mining Operations
✓ Paper, Steel & Heavy Manufacturing Facilities
✓ Data Centers (IDC) & Marine/Offshore Platforms

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Core Engineering Advantages

1. Standardized C-Profile Architecture

The skeletal frame is constructed from premium 2mm zinc-plated steel folded into a highly rigid "C-profile." Featuring a standardized 25mm hole pitch interval, it offers infinite flexibility for internal configuration and future capacity expansion without the need for on-site drilling or welding.

2. High-Density Motor Control Center (MCC)

Optimize your electrical room's footprint. The highly compact withdrawable design allows for maximum spatial utilization. Multiple functional drawer units (up to 36 modules in a single vertical section) can be stacked securely, making it the ultimate solution for large-scale motor control.

3. Uncompromised Safety & Form 4b Separation

Featuring physical internal separation up to Form 4b, each functional zone (Busbar compartment, Equipment compartment, and Cable compartment) is strictly isolated. Flame-retardant, high-strength engineering plastics and arc-proof designs protect operators and prevent fault propagation.

4. Seamless Hot-Swappable Maintenance

The withdrawable units feature distinct 'Connected', 'Test', and 'Disconnected' mechanical positions. Modules can be safely swapped, inspected, or tested without powering down the entire cabinet, guaranteeing zero downtime for your critical operational loads.

Global Factory Acceptance & Turnkey Support

Every HJ-MNS unit undergoes rigorous routine testing aligned with strict IEC 61439 standards before dispatch. We proudly support Remote Video FAT (Factory Acceptance Test) for our global EPC clients, ensuring total transparency.

To support local manufacturing and joint ventures, this series is fully available in CBU (Completely Built Unit), SKD (Semi-Knocked Down), or CKD (Completely Knocked Down) delivery formats.

Technical Specifications

(Note: Parameters cover standard HJ-MNS configurations. Specific ratings will be tailored to your project's single-line diagram.)

Compliance Standards	IEC 61439-1 / IEC 61439-2
Rated Operational Voltage (Ue)	400V / 690V AC
Rated Insulation Voltage (Ui)	1000V AC
Rated Main Busbar Current (In)	Up to 4000A / 5000A / 6300A
Short-Time Withstand Current (Icw)	50kA / 65kA / 80kA / 100kA (1s)
Peak Withstand Current (Ipk)	105kA / 176kA / 220kA
Form of Internal Separation	Form 2b, 3b, 4a, 4b
Drawer / Module Sizes	8E/4, 8E/2, 8E, 16E, 24E (Up to 36 circuits per cabinet)
Enclosure Protection Degree	IP30 / IP40 / IP54

Normal Operating Environment

Ambient Temperature: -5°C to +40°C (Average over 24h ≤ +35°C).
Altitude: Standard ≤ 2000m.
Relative Humidity: ≤ 50% at +40°C (Higher humidity allowable at lower temperatures, e.g., 90% at +20°C).
Installation Requirements: Indoor environment without severe dust, chemical corrosion, or intense vibration.

HJ-MNS Series Premium Withdrawable