The MCS Low Voltage Intelligent Drawer Cabinet Switchgear is a low-voltage (up to 690V AC) enclosed switchgear assembly designed for intelligent power distribution and motor control. Each functional unit–including feeder breakers, motor starters, capacitor switching modules, and instrumentation units–is housed in a fully withdrawable steel drawer plugging into a fixed cradle with self-aligning primary and secondary contacts.
● Distributes power safely to multiple downstream circuits
● Controls motors (start, stop, reverse, speed regulation via soft starters or VFDs)
● Protects equipment with short-circuit, overload, and ground fault coordination
● Monitors energy data locally via a built-in LCD on each drawer or remotely via RS485/Modbus/Ethernet IP
● Provides predictive maintenance alerts when contact wear, temperature rise, or abnormal drawer position is detected
In essence, this cabinet transforms a traditional low-voltage switchboard into an intelligent, communicable, and maintainable asset.
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Parameter |
Specification |
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Rated Insulation Voltage (Ui) |
1000V |
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Rated Operational Voltage (Ue) |
400V / 690V AC |
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Rated Current (Busbar) |
Up to 6300A depending on cabinet configuration and project requirements |
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Rated Current (Drawer) |
Up to 800A per drawer (larger with fixed section) |
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Rated Short-circuit Withstand (Icw) |
Up to 100kA for 1 second, subject to confirmed design and test documentation |
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Rated Peak Withstand (Ipk) |
220kA |
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Drawer Sizes |
8E/2, 8E, 16E, 24E (per IEC 61439-2) |
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Drawer Position Indication |
Connected / Test / Isolated / Withdrawn (with electronic sensor backup) |
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Communication Protocol |
Modbus RTU, Modbus TCP, Profibus DP, EtherNet/IP (optional) |
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Monitoring Parameters per Drawer |
Current, voltage, power, energy, temperature (3 points), contact wear level |
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Protection Class (Enclosure) |
IP40 (standard), IP54 (optional) |
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Operating Temperature |
-5°C to +45°C (derating above 40°C) |
|
Humidity |
≤85% non-condensing |
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Standards |
IEC 61439-1, IEC 61439-2, GB/T 7251.8 |
Key Features of MCS Low Voltage Intelligent Drawer Cabinet Switchgear
|
Feature |
Description |
|
Drawer position digital readout |
Each drawer reports its exact position (Connected/Test/Isolated) to the central HMI. No more guessing. |
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Intelligent temperature monitoring |
Three PT100 sensors per drawer measure primary contact, chassis, and ambient temperature. Alerts at 85°C. |
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Non-volatile memory chip on each drawer |
Stores drawer ID, rating, maintenance history, and running hours. Self-recognising plug-and-play drawers. |
|
Motorized drawer option |
For high-current drawers (≥400A), remote insertion/withdrawal via 24V DC motor. Operator stays outside the arc flash zone. |
|
Anti-condensation heater with humidity sensor |
Automatic heaters turn on when relative humidity >70% inside the enclosure. Prevents leakage currents. |
|
Integrated energy metering (Class 1.0) |
Every drawer includes an energy measurement chip; no external meters needed. |
● Data centers – real-time feeder monitoring and remote breaker operation
● Hospitals – quick drawer replacement without affecting critical loads
● Water treatment plants – high humidity tolerance with anti-condensation heaters
● Automotive manufacturing – motor starting with predictive wear indication
● Commercial high-rises – energy sub-metering per tenant floor by drawer
Every MCS Low Voltage Intelligent Drawer Cabinet Switchgear from Lugao Power Co., Ltd. is built with precision and attention to detail:
● Enclosure manufacturing: 1.5mm to 2.0mm zinc-coated steel, fully welded frame. Powder coating RAL 7035, minimum thickness 70μm. Salt spray test ≥400 hours per ISO 9227.
● Busbar system: High-conductivity ETP copper (99.9% purity). All joints silver-plated (8μm minimum). Busbars fully insulated with heat-shrinkable sleeves rated for 1000V.
● Drawer chassis: Formed from 2.5mm cold-rolled steel with corrosion-resistant passivation. Self-lubricating polymer guide rails guarantee smooth motion for >5,000 cycles.
● Primary contacts: Copper-tungsten alloy tips on a spring-loaded arm. Silver-plated contact surfaces. Rated for 3,000 electrical operations without re-plating.
● Secondary contacts: 24-pin silver-plated plug-in connector with gold-flashed pins. Contact resistance <1mΩ. Rated for 10,000 insertion/extraction cycles.
● Smart electronics: Industrial-grade components rated -25°C to +85°C. Each drawer controller undergoes 72-hour burn-in and calibration traceable to national standards.
● Factory testing: Every unit is subjected to dielectric test (2.5kV/min), temperature rise test (at 1.1x rated current), and functional communication test. Test reports archived for 15 years.
|
Certification |
Details |
|
IEC 61439-2 |
IEC 61439-1/2 compliant design. Type test documents or third-party inspection reports can be provided according to project requirements. |
|
ISO 9001:2015 |
Quality management system |
|
ISO 14001:2015 |
Environmental management |
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CE Marking |
LVD and EMC compliance |
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RoHS |
All electronic modules are lead-free and RoHS compliant |
|
Capability |
Lugao Solution |
|
Drawer intelligence |
Drawer position, temperature, energy and operating status monitoring available |
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Communication |
Modbus RTU/TCP and other protocols available depending on project requirements |
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Motorized drawer |
Optional motorized drawer design for high-current drawer units |
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Delivery |
Delivery time depends on configuration, quantity and component brand |
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Warranty |
Standard warranty with optional extended support based on project agreement |
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Electrical Configuration |
Incoming unit, feeder unit, motor control unit, capacitor compensation unit |
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Drawer Size |
8E/2, 8E, 16E, 24E according to load requirements |
|
Communication |
Modbus RTU, Modbus TCP, Profibus DP, Ethernet/IP optional |
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Monitoring Function |
Current, voltage, energy, temperature, drawer position and alarm status |
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Component Brand |
ABB, Schneider, Siemens, CHINT or project-specified brands |
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Busbar System |
Copper or aluminum busbar, customized rated current and short-circuit level |
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IP Protection |
IP40 standard, IP54 optional |
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Documentation |
Single-line diagram, layout drawing, wiring diagram, drawer schedule and test report |
A: Yes. The non-volatile FRAM chip retains data for at least 10 years without external power. Running hours, event logs, and contact wear data are preserved.
A: Open. We use standard Modbus RTU/TCP registers (documented in our manual). You can connect to any third-party SCADA, PLC, or BMS without additional gateway licenses.
A: The controller will report”Sensor Fault”on the drawer’s LCD and via communication. Mechanical operation remains unaffected. A replacement sensor kit can be installed in under 5 minutes without drawer removal.
A: Yes. We call this an ”empty smart drawer shell” – it includes the chassis, secondary contacts, memory chip, and monitoring electronics but without the main breaker. You can install your own preferred breaker later.
A: Yes. We offer a warranty extension plan for years 2 and 3.
Address
No. 19, Keaisi Road, Xiangyang Industrial Zone, Liushi Town, Yueqing City, China
Tel
Share your specs: Voltage level (e.g., 11kV, 33kV), rated capacity (kVA/MVA), and installation environment (Indoor/Outdoor).
Our engineering review: We analyze your load profile and short-circuit requirements (2-4 hours).
Deliverables: You'll receive a preliminary GA drawing, technical datasheet, and commercial offer within 24 working hours.
