Low-Voltage Draw-Out Switchgear

Modular | Safe | Intelligent | IEC/GB Compliant

Overview

This low-voltage withdrawable switchgear (MCC) is designed for power distribution and motor control in industrial, commercial, and infrastructure projects. The drawer units adopt a standardized modular architecture supporting live hot-swap replacement, minimizing system downtime. Mechanical interlocks enforce three distinct positions – Connected, Test, and Disconnected – enabling isolated maintenance of faulty circuits without a full power shutdown.

Key Technical Features

1. Draw-Out Mechanism with Positive Interlocking

• Three-position drawer: Connected (power circuit closed), Test (control circuit closed, main circuit isolated), Disconnected (fully isolated).

• Mechanical interlock between drawer operating handle and compartment door: door can only be opened when handle is in Disconnected position.

• Interchangeable drawer units of same rating – no special adjustment required for replacement or expansion.

2. Robust Construction & Material Standards

• GCK series: Compact, cost-effective, widely used in general industrial distribution.

• GCS series: High-strength section steel frame, deeper drawer compartments, able to accommodate higher-rated components (e.g., 630A and above); superior short-circuit withstand capacity (up to 100kA).

• MNS series: C-section steel framework (forming a self-supporting structure), high circuit density (up to 36 circuits per cubicle), supports double-sided operation for space-constrained E-house applications.

3. Compartment Segregation & Arc Protection

• Physically separated compartments: Busbar compartment (top), Electrical compartment (front), Cable compartment (rear/bottom). Separators are made of steel or flame-retardant insulating plates.

• Busbars are covered with flame-retardant insulating sleeves or shields to mitigate arc-flash risks.

• Protection rating: IP30 / IP40 (selectable), preventing ingress of solid foreign objects ≥2.5mm or ≥1.0mm.

4. Safety Interlocks & Misoperation Prevention

• Drawer mechanical interlock (prevents moving between positions unless handle is correctly operated)

• Door interlock (door locked when drawer is in Connected or Test position)

• Anti-misoperation shutter mechanism (automatically covers live fixed contacts when drawer is withdrawn)

5. Intelligent & Expandable Architecture

• Reserved slots for intelligent monitoring modules (current, voltage, power, temperature, contactor status).

• Supports three-remote functions – remote signaling, remote measurement, remote control – for integration into SCADA or power automation systems.

• Optional communication protocols: Modbus RTU, Profibus, IEC 61850 (upon request).

• Compatible with mainstream low-voltage components (ACB, MCCB, contactors, soft starters, VFDs) from ABB, Schneider, CHINT, etc.

• Custom engineering available: special copper layouts, N+1 redundancy, form of internal separation (Form 3b/4b).

6. Standardized & Flexible Configuration

• Standardized modular hole patterns for mounting devices – strong universality of auxiliary components.

• Mixed configuration: withdrawable drawers and fixed compartments can be combined within the same cabinet.

• Top-mounted busbar bridge optional for top or bottom cable entry/exit.

Technical Specifications (Typical)

Application Scenarios

• Industrial plants (steel, chemical, cement, automotive)

• Commercial buildings and data centers

• Renewable energy projects (PV combiner boxes, wind power auxiliary systems)

• Infrastructure (tunnels, water treatment, airports, metro stations)

• Smart factory retrofit with digital O&M backend (real-time temperature/vibration/breaker status monitoring)

Why This Product?

• Maximized uptime – Hot-swappable drawers reduce MTTR (Mean Time To Repair) from hours to minutes.

• Engineered safety – Three-position interlock + compartment segregation meets highest safety requirements for live working.

• Scalable – Add or upgrade circuits without changing the main cabinet.

• Global compatibility – Works with major OEM components, certified to international standards.

Typical Applications

• Low-voltage power distribution and motor control centers (MCC) in industrial facilities

• Low-voltage distribution systems for data centers and commercial buildings

• Critical load distribution in metallurgy, petrochemical, and power industries

• Automated production lines requiring high reliability and maintainability

Contact our engineering team for a configuration drawing, short-circuit calculation, or a customized quotation.