Introduction
The GCS Series Low Voltage Withdrawable Switchgear Cabinet is a fully enclosed, draw-out type low voltage switchgear cabinet designed for three-phase AC power distribution systems operating at 380 V (400 V) and 660 V. Engineered to meet GB/251 and JB/T9661 standards, this three phase low voltage switchgear is the preferred choice for power plants, petrochemical facilities, steel mills, textile factories, high-rise buildings, and large automated industrial systems worldwide.
With a rated busbar current of up to 4,000 A, short-circuit withstand current up to 176 kA (peak), and full compatibility with computer-controlled environments, the GCS cabinet provides a safe, scalable, and modular solution for both new installations and system upgrades. Manufactured by Zhejiang Gangheng Electric Co., Ltd. - a national high-tech enterprise established in 2004 - each cabinet is built to last and configurable to your exact project requirements.
Why Choose The GCS Low Voltage Switchgear Cabinet?
High Current Capacity
Horizontal busbar rated up to 4,000 A and vertical MCC busbar at 1,000 A, meeting the heavy-load demands of industrial plants, mining operations, and utility substations.
Modular & Withdrawable Design
The fully withdrawable drawer structure allows each functional unit to be removed or replaced without interrupting adjacent circuits - minimizing downtime and simplifying maintenance for EPC contractors and plant operators.
Wide Voltage Compatibility
Supports main circuits at AC 380 V (400 V) and 660 V, with auxiliary circuits at AC 220 V / 380 V (440 V) and DC 110 V / 220 V - suitable for diverse global project specifications.
Customizable Configuration
Drawer height modules from ½ unit to 3 units. Cabinet widths of 400 / 600 / 800 / 1,000 mm and depths of 800 / 1,000 mm allow the system to fit any switchroom layout. Supports PEN, PE+N, and PE+N busbar arrangements.
Certified & Proven
Compliant with Chinese national standards GB/251 and JB/T9661. Built under ISO 9001, ISO 14001, and OHSAS 18001 certified quality systems. Gangheng products are listed as a qualified supplier on the State Grid e-commerce platform and have been successfully deployed in projects across the Middle East, Africa, and Central Asia.
Competitive Pricing with Fast Delivery
Factory-direct supply with no minimum order quantity. Typical lead times: orders up to USD 300K ship within 30 days; up to USD 700K within 45 days; up to USD 1.5M within 60 days.
Technical Specifications
Product drawing
| Parameter | Specification |
| Rated Main Circuit Voltage | AC 380 V (400 V) / 660 V |
| Rated Auxiliary Circuit Voltage | AC 220 V / 380 V (440 V), DC 110 V / 220 V |
| Rated Frequency | 50 Hz (60 Hz) |
| Rated Insulation Voltage | 660 V (1,000 V) |
| Rated Horizontal Busbar Current | ≤ 4,000 A |
| Rated Vertical Busbar Current (MCC) | 1,000 A |
| Short-time Withstand Current (Busbar) | 50 kA / 80 kA (1s) |
| Peak Withstand Current (Busbar) | 105 kA / 176 kA |
| Main Circuit Dielectric Test (1 min) | 2,500 V |
| Auxiliary Circuit Dielectric Test (1 min) | 2,000 V |
| Cabinet Height | 2,200 mm |
| Cabinet Width | 400 / 600 / 800 / 1,000 mm |
| Cabinet Depth | 800 / 1,000 mm |
| Protection Class | IP30 / IP40 |
| Busbar Arrangement | Three-phase three-wire (A.B.C.PEN) / Three-phase five-wire (A.B.C.PE.N) |
Structural Features
The GCS low voltage switchgear cabinet is constructed on an 8MF profiled steel framework assembled via bolted and welded connections, with standard mounting hole pitch E = 20 mm for universal compatibility.
Zoned Compartment Layout
The interior is strictly divided into functional unit compartments, busbar chambers, and cable chambers. Each zone operates independently, reducing the risk of fault propagation and enabling safer live maintenance access.
01
Withdrawable Functional Units
Drawer units change only in height while width and depth remain constant, ensuring interchangeability across the same functional group. Units above ½ size incorporate multi-function back panels.
02
Reliable Cable Connections
Dedicated cable chambers for motor control centers include conversion terminals that connect internal cables to external wiring quickly and securely. Two cable chamber depths (240 mm and 440 mm) are available to accommodate varying cable quantities and cross-sections.
03
Anti-misoperation Interlocks
Each drawer is equipped with mechanical interlocking devices to prevent incorrect insertion or operation sequences.
04
Dry-Type Transformer Compatible
The cabinet design allows direct combination with dry-type transformers, forming a compact and economical integrated power distribution assembly.
05
Applications
The GCS Series three phase low voltage switchgear cabinet is engineered for demanding environments across a wide range of sectors:
Power Generation & Utilities
Power plants, grid substations, renewable energy facilities
Oil, Gas & Petrochemical
Refinery distribution boards, pump motor control centers
Metallurgy & Steel
Rolling mill drives, high-load industrial distribution
Textile & Light Industry
Factory floor distribution and motor control
Mining Operations
Underground and surface distribution switchboards
Commercial & High-Rise Buildings
Main low voltage distribution panels
Industrial Parks & EPC Projects
Turnkey power distribution packages
Ordering & Customization
Gangheng Electric accepts full custom configurations with no minimum order quantity. To place an order or request a quotation, please provide:
- Full model number including main circuit scheme and auxiliary circuit scheme codes
- Main circuit system single-line diagram
- Auxiliary circuit schematic diagram
- Cabinet component list (bill of materials)
- Electrical ratings - voltage, current, and timing parameters
- Any special project-specific requirements
Place an order or request a quotation
Zhejiang Gangheng Electric Co., Ltd. has been manufacturing switchgear and power distribution equipment since 2004. Recognized as a National High-Tech Enterprise, Gangheng holds ISO 9001, ISO 14001, and OHSAS 18001 certifications, 5 utility model patents, and is a qualified supplier on China's State Grid procurement platform.
Our production facility in Jiangshan City, Zhejiang Province is equipped with CNC punching machines, CNC bending machines, laser cutting machines, and copper busbar fabrication equipment - supporting consistent quality at scale. We have successfully supplied switchgear to power, industrial, and infrastructure projects in Iran, Kyrgyzstan, Tanzania, Zimbabwe, and across the Middle East and beyond.
Warranty: 12 months free repair after acceptance inspection. Latent defects covered for up to 5 years post-warranty. 24/7 on-site technical support available.
Frequently Asked Questions
Q1: What is the rated voltage and current range of the GCS Series low voltage switchgear cabinet?
The GCS Series low voltage switchgear cabinet supports main circuit voltages of AC 380 V (400 V) and 660 V, with auxiliary circuit voltages of AC 220 V / 380 V (440 V) and DC 110 V / 220 V. The horizontal busbar is rated up to 4,000 A, making it suitable for heavy-load industrial and utility distribution systems.
Q2: Can Gangheng Electric manufacture custom configurations for specific project requirements?
Yes. Gangheng Electric accepts fully customized orders with no minimum order quantity - even a single cabinet can be manufactured to specification. Customers can specify cabinet dimensions (width from 400 mm to 1,000 mm), drawer unit combinations, busbar arrangements (PEN, PE+N), circuit schemes, and component lists. Simply provide your project drawings and technical requirements, and our engineering team will respond with a detailed proposal within 24 business hours.
Q3: What are the typical lead times for GCS switchgear orders?
Lead times depend on order volume. As a general guideline: orders valued up to USD 300,000 are typically delivered within 30 days; orders up to USD 700,000 within 45 days; and orders up to USD 1,500,000 within 60 days. For time-sensitive projects in the Middle East or other export destinations, please contact us directly to confirm production scheduling.
Q4: What quality certifications does the GCS low voltage switchgear cabinet comply with?
The GCS Series is designed and manufactured in compliance with Chinese national standards GB/251 and JB/T9661. Gangheng Electric's production and quality management systems are certified under ISO 9001, ISO 14001, and OHSAS 18001. The company holds CQC product certification and is a qualified supplier on China's State Grid e-commerce procurement platform. Type test reports are available upon request.
Q5: What warranty and after-sales support does Gangheng Electric provide for exported switchgear?
All GCS cabinets are covered by a 12-month free repair warranty starting from acceptance inspection. In addition, Gangheng Electric extends responsibility for latent defects for up to 5 years after the warranty period expires. For international customers, we provide full technical documentation, installation guidance, and 24/7 on-site support upon request. Spare parts are supplied at no higher than market price throughout the product's service life.
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