GCS Low Voltage Withdrawable Switch Cabinet
GCS-type low-voltage withdrawable switchgear is suitable for use in low-voltage distribution systems such as power plants, substations, petrochemical sectors, factories and mines, high-rise buildings, and so on, as well as for electric energy conversion, distribution, and control such as capacitance compensation.
The GCS type low-voltage withdrawable switchgear has high making and breaking capabilities, good dynamic and thermal stability, an advanced and reasonable structure, a flexible electrical scheme, a high protection level, safety and reliability, ease of maintenance, and excellent technical performance indicators.
GCS-type low voltage withdrawable switchgear is engineered for heavy distribution duty — power plants, substations, petrochemical sites, factories, mines, and high-rise buildings — combining feeder distribution, motor control, and capacitor compensation sections in one drawer-based line-up. High making and breaking capability together with strong dynamic and thermal stability keeps these boards composed where fault levels and load continuity both run high.
Every GCS line-up we deliver starts from your single-line diagram and discrimination study: drawer assignments, busbar sizing, and protection settings are locked before fabrication begins. Since 2010 our teams have completed more than 4,000 industrial projects, and CNC fabrication plus in-house wiring keeps multi-cabinet GCS rows consistent in fit, finish, and testing.
Feature of Low Voltage Withdrawable Switch Cabinet
The cabinet frame uses double-folding technology with aluminum-zinc-coated steel plates. The frame has modular holes spaced at 25mm intervals (K profile). The frame is simple to construct and durable. The entire frame is joined exactly by transverse and longitudinal bolts, and the frame structure requires no maintenance.
The shell is electroplated and powder coated. The top cover of the horizontal busbar region may be removed for easier on-site busbar installation.
Each functional room is clearly segregated, with divisions primarily divided into functional unit rooms and cable rooms. Each unit's functions are autonomous and have no effect on one another.
The horizontal busbar is mounted flat beneath the cabinet, increasing its capacity to withstand the electric power generated by a short-circuit current.
It features a drawer-style construction and can accommodate up to 36 circuits. The rated current of the circuit is 400A or less. The drawer circuit may be converted to three positions without compromising its protection level.
Each unit may accommodate up to 11 drawers or 22 1/2 drawers.
The drawer has five positions: opening, shutting, testing, pulling out, and isolating, and it features clear signals that correspond to sound, light, and text directions.
GCS Low Voltage Withdrawable Switch Cabinet Technical Parameters
| Rated insulation voltage Ui | exchange | 690V、1000V | ||
|---|---|---|---|---|
| Rated operating voltage Ue | Main circuit/ auxiliary circuit | exchange | 400V、660V | |
| exchange | 380V、200V | |||
| Direct current | 200V、100V | |||
| Rated impulse withstand voltage Uimp | 8KV | Vertical busbar rated current | 1000V | |
| Overvoltage level | Ⅲ | Rated peak withstand current (0.1S) IPK | Vertical 105kA | |
| pollution level | 3 | Level 176kA | ||
| Rated frequency | 50(60)Hz | Rated peak withstand current (0.1S) IPK | Vertical 80kA | |
| Horizontal bus rated current | Ie≤4000A | Level 80kA | ||
| Enclosure rating | IP30、IP40 | Dimensions2200x(400,600,800,1000)x(600,800,1000) | ||
Key Specifications & Options
The configuration below reflects the options we build to order for GCS low voltage withdrawable switch cabinets. Every parameter can be adjusted to match your drawings and site conditions — send us your requirements and our engineers will confirm what applies to your project.
| Parameter | Options / Typical Range |
|---|---|
| Assembly type | Withdrawable low voltage switchgear (GCS type) for distribution and motor control |
| Rated voltage | AC 50 Hz, 380/400 V working voltage on a 660 V insulation class |
| Functional units | Drawer-type outgoing units, with fixed feeder and compensation compartments as required |
| Main busbar current | Engineered to the load schedule and fault level of the line-up |
| Electrical performance | High making and breaking capability with verified dynamic and thermal stability |
| Protection degree | IP30 typical for the assembled board |
| Applicable standards | GB 7251 series for LV assemblies, corresponding to IEC 61439 |
| Typical applications | Power plant station service, substation LV boards, petrochemical plants, high-rise buildings |
Frequently Asked Questions
How does GCS differ from GCK and MNS?
All three are withdrawable national-standard families, and the differences live in drawer formats, busbar arrangement, and frame details — which in practice means each fits different existing fleets and spare-part stocks. We select per your drawings and maintenance policy rather than by preference, and confirm dimensions and interfaces in the quotation.
Withdrawable or fixed construction — what changes for maintenance?
Withdrawable GCS sections let a single drawer be isolated, tested, and exchanged while its section stays in service; fixed boards are simpler and cheaper but need the circuit shut down to work on it. Where continuity pays for itself — process plants, towers — withdrawable is standard practice.
Can a GCS line-up include capacitor compensation?
Yes — compensation cabinets sit in the row and couple to the main busbars, with automatic step control following the plant power factor. This is common where the utility contract penalizes low power factor and the transformer headroom matters.
Which standards apply to GCS boards?
The GB 7251 series for low voltage assemblies, corresponding to IEC 61439. Design verification — strength, temperature rise, short-circuit withstand — follows the series, and we deliver the documentation with the completed board.
Related Guides
- Low-Voltage-Switchgear Guide: Functions, Types, and Selection Inputs — a primer on the LV families
- Choose the Right Switchgear for Your Facility: Full Guide — the full selection framework around voltage class and continuity
- Understanding the Differences Between High, Medium, and Low Voltage Switchgear — where LV withdrawable boards sit in the power chain
- MNS Low Voltage Withdrawable Switch Cabinet — the modular withdrawable alternative in the same family
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