3 Phase Dg Set
MST 3 phase dg set deliver stable 380V/400V three phase power for industrial, commercial and infrastructure projects that run motors, HVAC compressors, IT loads and other equipment requiring balanced three phase supply. Each set pairs a heavy-duty diesel engine - Weichai, Yuchai, SDEC, Cummins or Ricardo - with a brushless, AVR-regulated alternator, and is available in open-type, sound-attenuated, containerized or trailer-mounted configurations to match project noise, mobility and environmental requirements.
As the core product line of MST, 3 phase sets are built across a wide output range - from small workshop backup units through to large-capacity sets for mining, data center and utility projects - on the same production line, quality process and after-sales structure, so buyers can source multiple capacities and configurations from a single, consistent supplier.
MST three phase generator sets - open-type, sound-attenuated and containerized configurations - supplying continuous power on a mining site.
Core Product Advantages
Five engine platforms across one power range
Every set is built on your choice of Weichai, Yuchai, SDEC, Cummins or Ricardo engines spanning roughly 15 kVA to 3,750 kVA (see individual model spec sheets for exact ratings) - so a single order can cover a project's backup, prime and continuous-duty requirements without switching suppliers or re-qualifying a new vendor for each capacity tier.
AVR-regulated, three phase four-wire alternators
Alternators use automatic voltage regulation (AVR) with all-copper brushless excitation and a three phase, four-wire Y-connection - holding output voltage stable under fluctuating load, which protects motors, compressors and sensitive electronic equipment downstream from voltage-spike damage and unplanned trips.
≤7-second automatic transfer switching (optional ATS)
Paired with an MST automatic transfer switch, mains-to-generator changeover completes in 7 seconds or less (3-10 seconds customizable), with real-time monitoring of mains, generator and load status - cutting the manual-intervention window that causes unplanned downtime during grid outages.
Parallel operation and load-sharing control
The load sharing and synchronization control board supports two or more generator sets running in parallel, plus grid connection, using PID-based load distribution - letting buyers add generating capacity in phases as demand grows, instead of buying and installing a single oversized unit upfront.
Four configurations on one chassis platform
Open-type, sound-attenuated enclosure, ISO container and trailer-mounted versions are built on the same core engine-alternator package - so a buyer running both a fixed indoor installation and a mobile job-site unit can standardize on one engine platform and one spare-parts inventory.
25+ years of production, exported to 110+ countries
Milestone has manufactured generator sets in Baoding, Hebei for more than 25 years, with full in-house R&D, production, sales and service, and has shipped to more than 110 countries and regions - giving buyers a supplier track record across a wide range of climates, grid conditions and regulatory environments.
Configurations Built for Different Project Types
The same three phase engine-alternator package is available in four physical configurations, so the right project fit is a configuration choice, not a different product line.
Open-Type Generator Set
- Compact tank base - An integrated fuel tank base supports up to 8 hours of continuous full-load running at prime power, so remote sites refuel less often.
- Natural ventilation cooling - The open frame allows unobstructed airflow around the engine and radiator, preventing overheating during long-term full-load operation - useful where units run continuously in mining, quarrying or construction environments.
- Simplified structure, lower maintenance cost - No enclosure or complex auxiliary systems means fewer failure points and direct access for technicians during daily checks and repairs, reducing service time and long-term maintenance cost.
Sound-Attenuated (Silent) Enclosure Generator Set
- Sealed, sound-insulated cabinet - Professional sound insulation and core-component optimization address the noise limitation of open-type units, so the set can be sited on or near noise-sensitive locations such as commercial buildings, hospitals or urban construction sites.
- Multi-point lifting and loop leakage protection - Top and bottom lifting points simplify crane loading and site transfer, while loop leakage protection adds a safety layer during installation and operation.
Container Generator Set
- Waterproof, corrosion-resistant housing - The ISO-container-based enclosure is built for wide temperature ranges and high-altitude sites, with access doors on each side for maintenance and integrated AC/DC lighting for night work.
- Plug-and-run operation - Cable-only start-up and multiple cable entry points simplify commissioning for continuous, emergency or standby duty at telecom, water treatment or utility sites.
Trailer-Mounted Generator Set
- Towable, rapid deployment - The set is mounted on a purpose-built trailer chassis, so it can be towed between job sites and put into service without a crane or forklift - useful for rental fleets and multi-site contractors.
- Rain, dust and vibration protection - A weather-resistant housing and vibration-reducing mounts keep the set running reliably in outdoor and temporary deployments.
3 Phase Dg Set Application Scenarios
An unplanned power interruption at a data center risks both downtime cost and data loss, and the failover has to be fast enough that IT and cooling loads never see a voltage gap. MST three phase sets pair with ComAp, DSE or SmartGen controllers and an ATS rated at ≤7-second transfer time, backed by AVR-regulated alternators for stable output under sudden load steps. That combination keeps critical IT and cooling equipment running through a grid outage without the voltage dip that trips sensitive electronics.
Construction sites relocate every few months and are frequently subject to urban noise limits, so crews need a unit that is both quick to redeploy and quiet enough to run near occupied buildings. The trailer-mounted configuration tows directly to a new site and starts powering tools and lighting within minutes, while the sound-attenuated enclosure option keeps noise output low enough for sites bordering commercial or residential areas.
Remote pits and quarries combine dust, wide temperature swings and no grid access, and a generator failure there stops production for the whole site, not just one machine. Open-type sets built on Weichai or Yuchai engines are rated for continuous full-load duty and cooled by natural airflow rather than fan-forced ducting that can foul with dust, while a container configuration adds a sealed, weatherproof option for harsher climates. Either way, excavators, dewatering pumps and site lighting keep running with fewer scheduled maintenance visits.
Utility and municipal water projects often need to scale generating capacity in stages as demand grows, rather than committing to one oversized unit at the outset. The load-sharing and synchronization control board lets two or more MST sets run in parallel or connect to the grid, so a utility can add a second or third unit later without replacing the switchgear it already installed.
A factory production line stopped by a grid outage loses not just the outage period but the restart and requalification time on the line afterward. A three phase set sized to the plant's motor and HVAC load, paired with an ATS, brings the line back within seconds of a mains failure rather than the minutes a manual-start unit would take.
OEM / ODM & Project Customization
Milestone operates a one-stop service model covering pre-sales technical consultation, customized design, equipment installation and commissioning, and after-sales operation and maintenance support - so buyers place one order rather than coordinating separate vendors for each stage of a project.
- Engine and alternator brand selection to match your target market's service network and buyer preference.
- Custom IP-rated enclosures, cable entry points and enclosure materials for the installation environment.
- Custom nameplate, control-panel branding and documentation for OEM/ODM resale.
- Protection parameters (over/under voltage, over/under frequency, reverse power, overload) programmed to your equipment's safety limits.
Manufacturing Strength & Global Reach
Milestone (Hebei Xiong'an) Technology Co., Ltd is based in Boye Industrial Park, Baoding City, Hebei Province, China, and has been engaged in the generator set industry for more than 25 years as an integrated manufacturer covering R&D, production, sales and service.
- Exported to more than 110 countries and regions across Asia, Africa, Europe, Oceania and the Americas.
- Engine platforms: Weichai, Yuchai, SDEC, Cummins and Ricardo, plus Perkins and Deutz options through partner engine programs.
- Alternator and control partners include Stamford, Leroy Somer, Mecc Alte, ComAp, DSE and SmartGen.
- Multi-dimensional quality inspection is carried out before delivery on every unit to check production consistency.
Optional: Automatic Transfer Switch & Control System
For buyers who need unattended, automatic power switching rather than a manual-start unit, MST three phase sets can be paired with an ATS and control system on the same order:
● Ultra-fast switching response - automatic transfer within ≤7 seconds when mains power fails (3-10 seconds customizable).
● Intelligent control & visualization - auto/manual mode selection with real-time monitoring of mains, generator and load status, reducing routine inspection workload.
● Scalable & future-proof - supports 2+ generator sets in parallel operation and grid connection, so capacity can be added later without replacing the core ATS.
Frequently Asked Questions
Q: What is the difference between prime power and standby power on an MST 3 phase dg set?
A: Prime power is the continuous rating for use as the main power source with a variable load and no fixed runtime limit per session. Standby power is the higher, short-duration rating for backup use during a grid outage, intended for intermittent rather than continuous operation. Both ratings are listed on each model's spec sheet - confirm which rating applies to your load before ordering.
Q: How do I choose between Weichai, Yuchai, SDEC, Cummins and Ricardo engines for the same kVA rating?
A: All five platforms are available across most of MST's power range, so the choice usually comes down to your target market's preferred brand for financing, insurance or resale documentation, plus the local service network for that engine brand. Our sales team can map your destination country and application to the engine brand with the strongest local parts and service coverage.
Q: What documents can you provide for customs clearance in my country?
A: We prepare standard export documentation (commercial invoice, packing list, certificate of origin) for each shipment, and can supply the specific compliance certificates your destination market requires for a given model and voltage/frequency configuration - send us your country and application so we can confirm exactly what is needed before you order.
Q: What is the MOQ and how is lead time determined?
A: MOQ starts at a single unit. Lead time depends on the model, engine brand and configuration (open-type units generally ship faster than customized container or trailer builds) and on the current production schedule - share your required model, quantity and configuration and we will confirm a delivery date with your quotation
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