Introduction
Draw out LV switchgear is the backbone of a low-voltage power distribution system - it takes incoming power and distributes, protects, and switches it across feeders and motor circuits, while letting maintenance staff pull out a faulty unit and swap in a spare without shutting down the whole panel. Gangheng's Draw out LV switchgear range covers three model families - GCK-0.4, MNS, and GCS - spanning 380V to 660V and up to 4000A, so buyers can match voltage class, current rating, and cabinet structure to their project rather than fitting the project to one fixed product.
These sit within Gangheng's broader [Low Voltage Switchgear] product line, alongside our fixed-type (non-draw-out) cabinets.
All units are produced at Gangheng's manufacturing base in Jiangshan, Zhejiang, on a 5,000–20,000 m² site equipped with CNC punching machines, CNC bending machines, laser cutters, and busbar bending machines, with in-house testing across the full production process.
Quick Spec Comparison
GCK-0.4
0.4kV (400V)
Busbar: 1000 / 1600 / 2500 / 3200A
50kA (1s) / 105kA peak
GB7251, JB/T9661
Draw-out, enclosed, PC & MCC types
MNS
380V / 660V
Horizontal bus: 630–4000A; Vertical bus: 1000A
50–80kA (1s) / 105–176kA (1s, alt.) / 105–150kA peak
IEC439 (EC439), VDE 0660 Part 5, GB7251-97, JB/T9661
Draw-out, modular (E=25mm), PC & MCC
GCS
380(400)V / 660V
Horizontal bus: ≤4000A; Vertical bus (MCC): 1000A
50/80kA (1s) / 105/176kA peak
GB7251, JB/T9661
Draw-out, enclosed, modular (E=20mm)
Cabinet Configuration
Like Gangheng's other switchgear lines, GCK, MNS and GCS are sold as a combination of functional cabinets, not a single SKU - buyers configure a complete system from:
Incoming cabinet (overhead-line or cable incoming)
Feeder / outgoing cabinet
Tie cabinet (bus-coupler)
Motor Control Center (MCC) - both GCK and MNS offer dedicated MCC cabinets (single-face or double-face operation); GCS integrates motor control into its functional-unit sizing instead of a separate MCC line.
GCS additionally standardizes functional units into five drawer sizes - 1/2 unit, 1 unit, 1+1/2 unit, 2 unit, and 3 unit (160mm module height) - so drawers of the same functional size are interchangeable across cabinets.
Main breaker type/rating is selected per project requirements; outgoing circuits are fitted with current transformers as needed.
Technical Parameters
GCK-0.4
|
Parameter |
Value |
|
Rated working voltage |
0.4kV |
|
Rated busbar current |
1000A / 1600A / 2500A / 3200A |
|
Rated short-time withstand current (1s) |
50kA |
|
Rated peak withstand current |
105kA |
|
Enclosure protection rating |
IP30; IP40 |
|
Applicable standards |
GB7251 Low-voltage switchgear and controlgear assemblies; JB/T9661 Draw-out type low-voltage switchgear assemblies |
|
Standard configuration |
Executed to GB/T national standards; can be executed to ANSI/IEEE or BS on customer request |
MNS
|
Rated frequency |
50–60Hz |
|
Rated working voltage |
380V / 660V |
|
Rated insulation voltage |
660V |
|
Rated current |
Horizontal bus: 630–4000A; Vertical bus: 1000A |
|
Rated short-time withstand current |
Horizontal bus: 50–80kA / 105–176kA; Vertical bus: 50kA/150kA |
|
Enclosure protection rating |
IP30, IP40, IP54* |
|
Applicable standards |
IEC439, VDE0660 Part 5, GB7251-97, JB/T9661; can be executed to ANSI/IEEE or BS on customer request |
*IP54 is available but not recommended, as derating at this rating is significant.
GCS
|
Parameter |
Value |
|
Rated main-circuit voltage |
AC 380(400)V / 660V |
|
Rated auxiliary-circuit voltage |
AC 220V / 380(440)V; DC 110V / 220V |
|
Rated frequency |
50(60)Hz |
|
Rated insulation voltage |
660V (1000V) |
|
Rated current |
Horizontal bus: ≤4000A; Vertical bus (MCC): 1000A |
|
Rated short-time withstand current (1s) |
50kA / 80kA |
|
Rated peak withstand current |
105kA / 176kA |
|
Power-frequency withstand voltage (1 min) |
Main circuit: 2500V; Auxiliary circuit: 2000V |
|
Busbar arrangement |
3-phase 4-wire: A.B.C.PEN; 3-phase 5-wire: A.B.C.PE.N |
|
Enclosure protection rating |
IP30, IP40 |
|
Applicable standards |
GB7251, JB/T9661; can be executed to ANSI/IEEE or BS on customer request |
Full external dimension and mounting-base drawings (width/depth options per current rating) are available for each model on request.
Customization
Gangheng accepts non-standard customization as a standard part of the sales process, not an exception:
We support customized configurations. Provide us with your transformer capacity and site drawings and our team will design a matching solution; if exact parameters aren't available, tell us the installation site, the connected equipment load, and the functional outcome you need, and our engineering team will propose a custom design. In most cases, custom configurations are priced the same as standard ones (dimensions may widen depending on the configuration). There is no minimum order quantity - we can deliver a single unit.
Applications
- Power systems (generation, transmission, and distribution)
- Power plants and substations
- Petrochemical industry
- Metallurgy and steel industry
- Light industry and textile industry
-
Factories and mines
-
Residential areas and high-rise buildings
Quality Certifications
ISO9001 (Quality Management System)
ISO14001 (Environmental Management System)
OHSAS18001 (Occupational Health & Safety Management System)
CQC Certification
Type test reports (HV switchgear line)
Patents: 5 utility model patents
Listed on the State Grid e-commerce procurement platform; a qualified supplier to State Grid and China Southern Power Grid
Products Description
Manufacturing base: Jiangshan, Zhejiang - under 3km from the G3 Beijing–Taipei Expressway Jiangshan South exit, under 7km from Jiangshan Railway Station, served by National Highway 205 and the Zhejiang–Jiangxi Railway
Key equipment: CNC punching machines, CNC bending machines, laser cutters, busbar bending machines, and a full range of testing equipment
Scale: 50–200 employees, 5,000–20,000 m² site, annual revenue RMB 50M–100M
23 years in the power distribution equipment industry (founded 2004)
Delivery & Trade Terms
No minimum order quantity - single-unit orders accepted
Lead time scales with order value: ~$300K orders in 30 days, ~$700K orders in 45 days, ~$1.5M orders in 60 days (or state as "lead time varies with order scale - contact us for a quote" if exact tiers shouldn't be public)
All equipment delivered is brand new, unused product
Warranty & After-Sales
12 months free warranty from acceptance
5 years of latent-defect protection after the warranty period ends
24/7 on-site support; spare parts priced at or below market rate
Technical documentation and training provided
Responsive handling of defects, missing parts, and quality inspection during installation and commissioning
Frequently Asked Questions
Q: What voltage and current range does GCK-0.4 / MNS / GCS Draw out LV switchgear cover?
A: GCK-0.4 is rated 0.4kV with busbar currents of 1000A, 1600A, 2500A or 3200A. MNS covers 380V and 660V, with horizontal-bus current from 630A to 4000A and a 1000A vertical bus. GCS covers 380(400)V and 660V, with horizontal-bus current up to 4000A and a 1000A vertical (MCC) bus. See the comparison table in Section 2 and the full parameter tables in Section 4.
Q: Can GCK-0.4 / MNS / GCS be customized to my transformer or site parameters?
A: Yes. Send us your transformer capacity and site drawings and we'll design a matching solution; if you don't have exact parameters, tell us the installation site, the connected equipment load, and the functional outcome you need, and our engineering team will propose a custom design. Customized configurations are priced the same as standard ones in most cases (dimensions may widen depending on the configuration), and there's no minimum order quantity.
Q: Which standards does each model meet - can it be supplied to ANSI/IEEE or BS requirements?
A: GCK-0.4 and GCS are built to GB7251 and JB/T9661. MNS additionally complies with IEC439 and VDE0660 Part 5. All three can be executed to ANSI/IEEE or BS standards on customer request - standard configuration follows GB/T national standards, with international standards available as a custom option.
Q: Is there a minimum order quantity?
A: No. We accept single-unit orders - there's no MOQ on any of these three lines.
Q: What is the lead time?
A: Lead time scales with order value: roughly 30 days for orders around $300K, 45 days around $700K, and 60 days around $1.5M. Contact us with your order scale for a specific quote.
Q: What does the warranty cover, and what happens after it expires?
A: 12 months of free warranty from acceptance, followed by 5 years of latent-defect protection after the warranty period ends. We also provide 24/7 on-site support, spare parts priced at or below market rate, technical documentation and training, and responsive handling of defects or missing parts during installation and commissioning.
Q: Can drawings and technical documentation be provided before I place an order?
A: Yes - for GCK-0.4 we'll need your one-line circuit layout, secondary circuit schematic (with scheme number if using a standard scheme), and switchgear arrangement plan; for MNS, the main-circuit single-line diagram, schematic, and full per-cabinet equipment specification; for GCS, the full model number with circuit scheme codes, main and auxiliary circuit diagrams, and the in-cabinet component list. We can review and quote based on whichever of these you're able to share.
Whether you need to see the exact cabinet configuration for your current rating, or just want a number to work with - we've got you covered.
Download Main Circuit Diagram to see the detailed configuration, or Get a Quote and tell us your requirements - we'll get back to you with a solution and pricing within 24 hours.
Hot Tags: draw out lv switchgear, China draw out lv switchgear manufacturers, suppliers, factory, Distribution Box, Electrical distribution box, gcs type low voltage drawout complete switchgear, switchboard and switchgear, switchgear and structurals, underground distribution switchgear