Full Series Low Voltage Switchgear & Distribution Cabinet | IEC & GB Standard modular low voltage switchboard
Ningyu Power manufactures draw-out & fixed type low voltage switchgear panel for power plant, mining, chemical, construction projects, support OEM ODM custom.
What Is Low Voltage Switchgear Panel?
Low voltage switchgear panel is a complete LV power distribution equipment for AC 50/60Hz, rated voltage 380V~660V. Our full range includes draw-out type MNS, GCS, GCK, fixed type GGD, separation cabinet GFB2 and wall/floor XL-21 power distribution box. These LV distribution cabinets are used for power conversion, distribution, motor control and reactive power compensation in power substation, industrial plant, petroleum, mining, marine, commercial building and wastewater treatment projects. All low voltage switchgear comply with IEC60439, IEC60529, GB7251 standards, with IP20~IP54 protection grade, busbar current from 630A up to 5000A. We provide OEM & ODM custom modular low voltage switchboard with D, U, Ms, Dc, Mx, Mf, Mw cabinet types to meet global engineering demands.
Safe & Reliable
Comply with IEC60439, IEC60529, GB7251 standards
Full Series
Draw-out & fixed type complete solutions 630A–5000A
OEM /ODM
Custom cabinet size, scheme, logo & color
Global Applications
Power plant, industry, marine, building, mining, oil & gas
Our products
MNS Low Voltage Draw-out Switchgear
Modular three-compartment structure, rated current 100–5000A, peak withstand current 100kA, suitable for power station, marine, drilling platform and heavy industry. Rated Voltage: 0.38–0.6kV Protection: IP30–IP54
GCS Low Voltage Draw-out Cabinet
MCC motor control center, horizontal busbar ≤4000A, vertical busbar 1000A, ideal for textile, metallurgy and high-rise building power distribution. Rated Current: ≤4000A Short-time withstand: 50–80kA
GCK Low Voltage Combination Switchboard
For substation below 1000kVA transformer, applicable to hotel, mining factory power & lighting distribution, IP2X/IP3X protection. Busbar range: 1250A–3150A Insulation voltage 1000V
GGD Fixed Low Voltage Switchgear
Economic fixed cabinet with 129 main circuit schemes, max rated current 3150A, single-side operation double-side maintenance, widely used as main incoming panel. Model: GGD1/GGD2/GGD3 Protection: IP30
GFB2 Low Voltage Separation Cabinet
Designed for national power grid projects, higher safety, busbar current 630A–2500A, IP31/IP41 protection grade. Busbar Current: 630A–2500A Protection: IP31/IP41
Main Technical Data of Low Voltage Switchgear
| Rated Voltage | AC 380V / 400V / 660V |
| Rated Frequency | 50/60Hz |
| Busbar Rated Current | 630A ~ 5000A |
| Short-time Withstand Current | 15kA ~ 220kA |
| Protection Grade | IP20, IP30, IP31, IP40, IP41, IP54 |
| Installation Environment | Indoor, altitude ≤2000m, temperature -5℃ ~ +40℃ |
| Compliance Standard | IEC60439-1, IEC60529, GB7251.1 |
Structure & Product Advantages
- Standard modular structure, flexible combination
- Draw-out type, easy installation & maintenance
- High breaking capacity, strong short-circuit withstand
- High quality component, long service life
- Multiple protection functions, safe and reliable
- Support customization, meet special project demand
| Item | Sub-item | Parameter |
|---|---|---|
| Application Scenario | — | Power Distribution, Motor Control |
| IS (Operation & Maintenance Index) | — | 211 ~ 333 |
| Reference Standards | — | IEC 60439-1, IEC 60529, IEC 61439-1&2, IEC 61641, GB7251.1 |
| Climate Resistance | Humid Heat Resistance | IEC 60068-2-30 |
| Dry Heat Resistance | IEC 60068-2-2 | |
| Low Temperature Resistance | IEC 60068-2-1 | |
| Salt Mist Resistance | IEC 60068-2-11 | |
| Installation Location & Environment | Location | Indoor |
| Environment Class | Class 2 |
| Item | Sub-item | Parameter |
|---|---|---|
| Cable Entry & Exit | — | Top / Bottom |
| Wiring Access Side | — | Front / Rear |
| Protection Class | — | IP20 ~ IP54 |
| Partition Form | — | 2b/3b/4a/4b |
| Connection Type | — | FFF / WWW |
| Dimension (mm) | Height | 2200 |
| Width | 500/600/700/800/900/1000/1100/1200/1300 | |
| Depth | 400/600/1000 | |
| Average Weight per Cabinet | — | 650 kg |
| Cabinet Enclosure | — | Epoxy powder coating, thickness > 50 μm |
| Enclosure Color | — | RAL9002 / RAL7016 |
| Item | Sub-item | Parameter |
|---|---|---|
| Rated Insulation Voltage (Ui) | — | 1000 V |
| Rated Operating Voltage (Ue) | — | 400/690V AC |
| Rated Frequency (F) | — | 50/60 Hz |
| Rated Impulse Voltage (Uimp) | — | 12 kV |
| Rated Auxiliary Circuit Voltage | — | Max. 230 V AC |
| Overvoltage Category | — | IV |
| Pollution Degree | — | 3 |
| Horizontal Busbar Rated Current | — | Up to 7000A |
| Vertical Busbar Rated Current | — | Up to 3200A |
| Horizontal Busbar | Rated Short-time Withstand Current (Icw/1s) | 30/50/65/85/100 kA |
| Rated Peak Withstand Current (Ipk) | 63/105/143/187/220 kA | |
| Vertical Busbar | Rated Short-time Withstand Current (Icw/1s) | 30/50/65/85 kA |
| Rated Peak Withstand Current (Ipk) | 63/105/143/187 kA | |
| Internal Arc Personal Protection IEC 61641 | — | 85kA 0.5s |
| Earthing System Type | — | TT / IT / TNS / TNC |
| Max Incoming & Outgoing Switch Current | — | 630 A |
| Max Supporting Motor Capacity | — | 250 kW |
| Item | Capacitor Cabinet | Draw-out Cabinet | Fixed Motor Control Center | Draw-out Cabinet |
|---|---|---|---|---|
| Rated Current / Rated Capacity | ≤3200A | ≤2100A | ≤3200A | 1000A |
| Rated Peak Withstand Current | 63, 105 or 187kA | 176kA | 63, 105 or 187kA | 187kA |
| Rated Short-time Withstand Current | 30, 50 or 85kA rms / 1s | 80kA rms / 1s | 30, 50 or 85kA rms / 1s | 85kA rms / 1s |
| Item | Capacitor Cabinet | Draw-out Cabinet | Fixed Motor Control Center | Draw-out Cabinet |
|---|---|---|---|---|
| Motor | — | ≤250kW | ≤250kW | ≤250kW |
| Power Distribution | — | ≤500A | ≤630A | ≤250A |
| Item | Capacitor Cabinet | Draw-out Cabinet | Fixed Motor Control Center | Draw-out Cabinet |
|---|---|---|---|---|
| Overall Height | 2200mm | 2200mm | 2200mm | 2200mm |
| Usable Height (1 module = 50mm) | 40 modules | 40 modules | 40 modules | 40 modules |
| Width | 700, 1100mm | 600mm | 700, 900, 1100, 1300mm | 500, 700, 900mm |
| Depth | 600, 1000mm | 1000mm | 400, 600, 1000mm | 600, 1000mm |
| Functional Unit Type | FFF | WWW | FFF | WWW |
| Partition Form | 1 / 2b | 3b / 4 | 1 / 2b / 3b / 4 | 3b / 4 |
| Protection Class IEC 60529 | IP20~IP54 | IP20~IP41 | IP20~IP54 | IP20~IP54 |
What We Can Do For You (Our Capabilities)
We cover the whole chain from project design to on-site delivery, full custom & standard product supply:
Full model product manufacturing
Produce all standard low voltage switchgear: MNS, GCS, GCK, GGD, GFB2, XL-21 and modular intelligent LV cabinets; support all current ratings 100A–7000A, IP20–IP54 protection grade.
Professional OEM / ODM Customization
Custom cabinet size, internal circuit scheme, busbar layout, brand logo, cabinet color, incoming & outgoing logic according to your drawings and site conditions.
Free electrical scheme design
Our senior electrical engineers design complete cabinet layout, single-line diagram, motor control logic and reactive power compensation scheme for your project for free.
Support third-party inspection
All cabinets comply with IEC 60439 / GB 7251 standard, support factory witness test, project site acceptance and global export certification.
Complete supporting assembly
Match internal breakers, busbars, terminal relays, capacitor banks, VFD and soft starter integrated installation; finish full wiring and factory pre-test before delivery.
Global export packaging & door-to-door shipment
Export standard fumigation-free wooden package, sea/air/rail freight arrangement, clear export customs for overseas projects.
What Problems We Solve For Your Project & Factory
We target the most common pain points of power owners, EPC engineers and factory maintenance teams:
Solve unstable power distribution risks
Avoid short circuit, electric arc leakage, overload tripping and three-phase unbalanced power failure. Our metal isolation structure and standard busbar process greatly reduce on-site power failure rate, protect your whole factory electrical equipment and production line from burnout damage.
Solve difficult on-site matching problems
Many project sites have special space size, transformer capacity and grounding system limits (TN-S / TN-C / TT). We tailor-make cabinet size and electrical parameters to perfectly match your upper transformer, high voltage switchgear and terminal production equipment, no on-site rework and modification.
Solve high energy consumption power loss
Support customized DC reactive power compensation cabinet configuration, effectively reduce reactive power loss, improve power factor, cut down your long-term factory electricity charge and avoid power bureau fine for low power factor.
Solve difficult centralized motor control
MNS/GCS MCC cabinet realizes centralized control of factory fans, water pumps and production motors; support remote signal linkage, save manual operation cost for your workshop management.
Solve construction & maintenance safety hazards
Three-compartment isolated structure prevents electric shock and arc explosion accident; clear circuit marking and modular structure lower the technical threshold for your electricians’ daily operation.
Solve project progress delay & budget overrun
Stable mass production capacity and standard production cycle guarantee on-time delivery; cost-effective cabinet scheme helps you control project budget, avoid repeated construction and accessory extra cost.
What Benefits We Provide For Equipment Users
Stable continuous power supply
Ensure normal operation of production lines, substation system, building lighting and wastewater treatment equipment, reduce production shutdown loss.
Lower operation & running cost
Energy-saving power distribution design reduce daily power consumption; standardized modular structure save your later replacement and transformation cost.
Simple daily operation
Unified operation standard and clear wiring diagram, your ordinary on-site electricians can complete switching, inspection and parameter adjustment independently.
Good system expandability
Modular frame design allows you to add loops, motors and compensation modules later without replacing the whole cabinet, convenient for factory capacity expansion.
Project data & technical document support
Provide complete BOM list, assembly drawing, wiring diagram, test report and operation manual for your project filing and system acceptance.
International Standards | Quality Assured | Global Export
Full Lifecycle After-sales & On-Site Maintenance Service
We provide global one-stop after-sales support for all our low voltage switchgear, no blind spot maintenance:
Pre-installation guidance service
Free provide foundation installation drawing, cabinet hoisting guide and wiring suggestion; our engineers provide remote video guidance for on-site installation and system debugging 7/24.
Global on-site door-to-door service
Support overseas engineer dispatch for large EPC projects: complete on-site cabinet assembly, system linkage debugging and whole power grid acceptance work.
Long warranty period
2-year full free warranty for whole cabinet; 3-year warranty for cabinet frame and busbar system. Free replacement of damaged non-human-damaged accessories during warranty period.
Daily operation & maintenance training
Free provide professional training for your on-site electricians: daily inspection standard, fault judgment, quick trip troubleshooting, component replacement and safe operation specification.
Lifetime low-cost maintenance & accessory supply
After warranty expiration, we provide original matching spare parts at factory price; offer lifetime remote fault diagnosis and technical consultation. We track your cabinet running status regularly.
Fault emergency response mechanism
7*24 hours online after-sales team: respond to equipment failure within 30 minutes, provide fault solution within 2 hours; solve emergency power failure problem priority to guarantee your normal production.
Later equipment renovation & upgrade service
Support old cabinet transformation, loop expansion, intelligent module upgrade and system rectification for your aging low voltage power distribution system.
Cooperate With Us
Send your project parameter or single-line diagram now, get free scheme design and custom quotation within 24 hours.
