SDB Drawer-Type Low-Voltage Switchgear Assembly

4000 A drawer-type LV switchgear — modular isolated drawers, global-brand breaker compatibility, GB / VDE / IEC 439 compliant.

What is SDB Drawer-Type Low-Voltage Switchgear Assembly?

SDB is a premium drawer-type low-voltage switchgear assembly adapted from the well-proven international MNS design to meet the evolving needs of the power industry. Compliant with GB 7251.1, VDE 0660, ZBK 36001-89 and IEC 439, SDB is trusted worldwide as the main distribution panel for industrial, commercial and infrastructure projects requiring flexible, modular power distribution up to 4000 A.

Where SDB fits

• Municipal infrastructure & commercial buildings

• Metallurgy, mining, cement & paper

• Petroleum, chemical & electric-power construction

• Telecom, information & electronics

Operating conditions

• Short-term maximum ambient: 40 °C

• Minimum long-term average ambient: −5 °C

• Maximum long-term average ambient: 35 °C

• Standard operating relative humidity: 50 %

Derating required when ambient temperature exceeds the limits above. For measurement, metering and protection-relay operating conditions, follow the manufacturer's instructions.

SDB at a glance

• Max rated current: 4000 A

• Compliance: GB 7251.1, VDE 0660, ZBK 36001-89, IEC 439

• Structure: drawer-type modular, compact footprint

• Breaker compatibility: accepts major global brand breakers

SDB key features

• Each drawer door is independently isolated — adjacent drawers do not interfere with each other.

• Compact modular structure, flexible assembly, neat layout, small footprint.

• Robust construction, reliable interlocks, high protection, full functionality.

• Dedicated high-current compartment plus multiple small-current drawer units in one cabinet.

• Safe and easy operation, excellent interchangeability, high short-time withstand current.

• Unique compatibility design accepts breakers from major global brands.

Business Values for Operators

• 4000 A in one cabinet — dedicated high-current compartment handles the largest main-distribution loads without paralleling multiple cabinets.

• Modular isolation = safer maintenance — each drawer is independently isolated, so maintenance on one circuit does not require de-energising the entire panel.

• Global-brand breaker compatibility — install Schneider, ABB, Siemens or other major-brand breakers in the same frame; procurement and spares stay simple across regions.

• Multi-standard compliance — GB 7251.1, VDE 0660 and IEC 439 in one platform reduce export certification effort for Asia, Europe and the Middle East.

• Compact footprint — modular design delivers high power density, freeing floor space in retrofit substations and dense plant rooms.

• Phased capacity expansion — add drawer units as load grows without replacing the whole switchboard.

Frequently Asked Questions

• Does SDB support major global brand breakers?
  Yes — SDB's unique compatibility design accepts breakers from the leading global manufacturers, so you can standardize on the breaker brand already qualified at your site.

• Is SDB suitable for export projects?
  Yes — compliance with GB 7251.1, VDE 0660, ZBK 36001-89 and IEC 439 covers the certification requirements of most Asia, Europe and Middle East markets.

• Can SDB expand as our load grows?
  Yes — the drawer-type modular structure lets you add drawers for new feeders without overhauling the existing main busbar system.

Request a Tailored Quotation

This page cannot submit forms directly. Please go to our FEEDBACK page and our technical sales team will reply within 1 working day with a customized distribution scheme, electrical schematics and formal quotation.

Prepare before submitting:

• Your full name & company name

• Project country & exact location

• Project type: industrial plant / commercial building / infrastructure

• Total estimated power load and main busbar current

• Preferred breaker brand (Schneider / ABB / Siemens / other)

• Compliance target (GB / VDE / IEC / other)

• Special environmental conditions (altitude, corrosive atmosphere, seismic zone)

All project information is strictly confidential.

Open FEEDBACK Inquiry →

Why HG upsboss

• Complete LV power distribution ecosystem — 8 product families from main switchgear to terminal PDU

• SDCT — new generation intelligent LV switchgear assembly (up to 6300 A)

• SDB — drawer-type LV switchgear (up to 4000 A)

• SDG — fixed-type LV switchgear (up to 1600 A)

• SDS — power distribution cabinet & box (up to 630 A / SDSF 400 A)

• SJMP — precision power distribution cabinet

• MASTER-LINE — data center busway system

• S-PDU — standard rack power distribution unit

• S-Smart PDU — intelligent rack power distribution unit

• International and Chinese national standards compliance for global export qualification

• Standard communication interfaces for UPS, cooling and environment-monitoring integration

• Responsive technical sales team — detailed proposal within 1 working day

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