When a mobile crushing or screening project moves into a remote quarry, mine, road construction site, or aggregate production area, power becomes one of the first things I need to think about. A good crushing machine is only useful when it has a stable power source behind it.

This is where the SPT500MGS / SPT800MGS mobile diesel generator sets come in. These generator sets are designed to provide independent power for mobile crushing and screening production lines, especially where fixed grid electricity is unavailable, unreliable, or simply not practical to install.

From our experience at Ganglong Heavy Industry Technology (Hefei) Co., Ltd., I have found that customers often focus heavily on the crusher, screen, or conveyor while treating the power system as an afterthought. In practice, that can create unnecessary trouble. Generator capacity, voltage, fuel consumption, transportation, ventilation, heat dissipation, and the connection between different machines all need to be considered before the production line starts.

The SPT500MGS and SPT800MGS are built around this idea. The SPT500MGS provides a rated power of 500 kW / 625 kVA, while the SPT800MGS provides 730 kW / 912.5 kVA rated power. Both are mobile diesel generator sets mounted on trailer platforms and designed for outdoor use.

According to the current Sunward PSR product information, the generator sets use rainproof and dustproof housings, ventilation and heat-dissipation systems, adjustable towing structures, mechanical supports, maintenance platforms, and lifting arrangements. They are also designed to operate across a temperature range from -40°C to 50°C.

In this page, I will explain how I look at these generator sets from a practical industrial point of view. I will cover their specifications, working principle, power matching, mobile design, outdoor protection, applications, transportation, inspection, and the questions customers normally ask before placing an order.

1. What Are SPT500MGS and SPT800MGS Mobile Diesel Generator Sets?

A diesel generator set is basically a system that converts the chemical energy in diesel fuel into mechanical energy and then into electrical energy. It sounds simple, but the real value comes from making that power stable enough for industrial equipment.

For a mobile crushing plant, the power demand can change quickly. Motors start and stop, conveyors move material, screening equipment vibrates, and crushing equipment can experience changing loads when the feed material becomes harder or heavier.

That is why an industrial generator for a crushing plant cannot be selected simply by looking at the average power consumption. The complete line needs to be considered.

The SPT500MGS and SPT800MGS are designed specifically around mobile crushing and screening applications. Sunward PSR lists them as independent power supply solutions for mobile production lines used in quarrying, mining, infrastructure, and aggregate production.

The two models provide different power levels. The SPT500MGS has a rated generator output of 625 kVA / 500 kW, with standby power listed at 688 kVA / 550 kW. The SPT800MGS has a rated output of 912.5 kVA / 730 kW and standby power of 1000 kVA / 800 kW.

Source: Sunward PSR official SPT500MGS / SPT800MGS technical specifications.

For customers, the most important point is that these are not simply small backup generators. They are designed as mobile industrial power sources for equipment that may run for long periods in demanding outdoor conditions.

The generator can therefore become the power center of a mobile crushing and screening line. Instead of waiting for a permanent electrical connection, the customer can bring the power source directly to the project site.

2. How Does a Mobile Diesel Generator Set Work?

The working principle is easier to understand than the technical terminology makes it sound.

The diesel engine burns fuel and turns the crankshaft. That mechanical movement drives the generator alternator. The alternator then produces electrical power, which is delivered to the connected equipment.

In the SPT500MGS and SPT800MGS, the engine operates at a rated speed of 1500 r/min. The current product data lists turbocharging and electronic speed control. The engines are designed around 0# light diesel fuel, with the listed lubricant requirement above CF level.

Turbocharging helps the engine take in more air so that it can produce the power required from a relatively compact engine package. Electronic speed control helps maintain the required operating speed as the load changes.

This matters in a crushing plant because the load is not always perfectly steady. The generator may need to respond as different motors start, stop, or change their operating load.

The electrical side also matters. Both models use an AVR excitation system. AVR means automatic voltage regulation. In simple terms, it helps keep the output voltage within a controlled range instead of allowing the voltage to move too much when the load changes.

The official specifications list a steady-state voltage regulation rate of ±1% and an adjustment range of no-load voltage of ±5%. The generator protection rating is IP23.

For an industrial customer, these numbers are useful because crushing equipment includes many electric motors and control systems. Stable electrical conditions are important for reliable operation.

Power Does Not Mean Only Kilowatts

One common mistake I see is comparing generator sets using only the kW number.

In industrial applications, I also look at kVA, voltage, current, power factor, frequency, motor starting conditions, the number of connected machines, and how the machines will operate together.

For example, two production lines may have similar running power but different starting requirements. A line with several large motors may need more attention during startup than a simple system with smaller motors.

This is why generator selection should be based on the complete production line instead of selecting a generator first and trying to make the equipment fit afterward.

3. Main Features of the SPT500MGS and SPT800MGS

Independent Power Supply

The main advantage is straightforward: the generator provides an independent power source for a mobile crushing and screening operation.

This is especially useful in remote areas where the electrical grid is unavailable. It can also help when a project is temporary and the cost or time required to build a permanent power connection does not make sense.

For quarrying and mining projects, the working area can change as the material is extracted. A mobile generator fits this type of working environment much better than a fixed power station.

500 kW and 730 kW Power Options

The two models give customers a choice based on the size of the production line.

The SPT500MGS provides 500 kW rated power, while the SPT800MGS provides 730 kW rated power. This makes it possible to match the generator more closely with the combined power demand of the crushing and screening equipment.

I would not automatically recommend the larger generator just because it has more power. Oversizing a generator can also affect operating economics. The right model should be based on the actual equipment configuration and operating plan.

Rainproof and Dustproof Housing

Crushing and screening sites are not clean indoor environments. There can be dust from stone, mud after rain, strong sunlight, wind, and large changes in temperature.

The SPT series uses a rainproof and dustproof housing designed for outdoor use. The housing also incorporates ventilation and heat-dissipation arrangements to help the generator work under demanding conditions.

This becomes particularly important in hot climates. An engine produces a lot of heat while working, and the generator itself also produces heat. Good airflow and heat management are therefore not optional details.

Wide Temperature Adaptability

Sunward PSR lists an operating temperature adaptability range of -40°C to 50°C. This gives the generator a broad working range for different climate conditions.

Of course, actual project operation still needs to consider local altitude, fuel quality, maintenance conditions, ambient temperature, and other site factors. A published temperature range should not replace a proper site evaluation.

Trailer-Mounted Structure

The mobile design is one of the most practical features of the SPT500MGS and SPT800MGS.

The generator housing and trailer form a transportable unit. The trailer uses leaf spring suspension and includes a handbrake and tractor-connected air brake. A height-adjustable pin-type traction frame allows the unit to connect with towing vehicles of different heights.

This is useful when a generator needs to move between several project locations. Instead of building a new power station each time, the customer can transport the generator to the next site.

Four-Corner Mechanical Supports

When the generator reaches the operating position, transportation wheels should not be treated as the only support.

The SPT series includes mechanical support devices at the four corners of the frame. These supports help stabilize the unit during operation and provide a more practical working arrangement.

Maintenance Platforms

Maintenance is much easier when technicians can actually reach the parts they need to inspect.

The SPT500MGS and SPT800MGS provide maintenance platforms on three sides and rear pedals. These arrangements make routine inspection and servicing more convenient.

For me, this is the kind of feature that may not look exciting in a product photograph but becomes very important after months of actual operation.

4. Matching the Generator with a Crushing and Screening Plant

This is probably the most important section for customers buying a mobile diesel generator for a crushing plant.

The generator should be selected after the production line is understood.

Sunward PSR provides recommended generator configurations for several mobile crushing and screening combinations. For example, the official data recommends at least 400 kW generator power for an SP127JE combined with an SP1560SE or SP2065SE. The listed generator model for this combination is SPT500MGS.

For a larger production line consisting of SP127JE + SP300CE + SP1560SE or SP2065SE, the published recommendation is at least 750 kW generator power and at least 800 kVA transformer power, with SPT800MGS listed as the generator set model.

Source: Sunward PSR official “Recommended Generator Configuration for Production Line” table.

This table is useful because it shows something that a normal generator specification sheet cannot show: the generator is designed to work as part of a larger crushing and screening system.

SPT500MGS for Smaller Production Lines

If the crushing line includes a Crawler Jaw Crusher and a mobile screening plant, the SPT500MGS can be considered when the calculated power requirement matches the published configuration.

For example, Sunward lists the combination of SP127JE with SP1560SE or SP2065SE and recommends at least 400 kW generator power. The SPT500MGS provides 500 kW rated power.

However, I would still check the complete operating sequence before confirming the generator. Starting conditions, additional conveyors, auxiliary equipment and other electrical loads should be included in the calculation.

SPT800MGS for Larger Lines

For a larger line with jaw crushing, cone crushing and screening, the power requirement increases. The published recommendation of at least 750 kW for the SP127JE + SP300CE + SP1560SE / SP2065SE configuration is why SPT800MGS is listed for this combination.

The SPT800MGS has 730 kW rated power and 800 kW standby power according to the current specification. This illustrates why the detailed electrical design of the production line matters.

I always recommend checking the complete load list and starting sequence with the project engineer before finalizing the generator configuration.

5. SPT500MGS vs SPT800MGS: Which Power Level Fits?

Customers often ask me to simply say which generator is suitable. I prefer to explain the difference first.

The SPT500MGS is the smaller of the two models and is rated at 500 kW. The SPT800MGS is rated at 730 kW. Their physical dimensions and weights are also different.

Source: Sunward PSR official SPT500MGS / SPT800MGS technical parameters.

The fuel consumption figures are published ranges rather than guaranteed consumption at every load. Actual diesel consumption can change with operating load, ambient conditions, engine condition and working time.

If the production line is relatively compact and the calculated power requirement is within the SPT500MGS range, there may be no reason to use a larger generator.

If the line contains several high-power crushing and screening machines, the SPT800MGS provides a larger power platform.

Again, I would not select the model based only on the name. The correct approach is to calculate the connected load and operating conditions first.

6. Why Mobile Power Matters in Mining, Quarrying and Construction

Quarrying

Quarries are often located away from large cities and established industrial power infrastructure. A mobile diesel generator can provide a practical independent power source for crushing and screening equipment.

This is especially useful when the production area changes over time. The generator can move with the production equipment instead of depending on a fixed electrical installation.

Mining

Mining projects can operate in remote areas where grid power is limited. The combination of mobile crushing equipment and independent diesel power can help create a more flexible production setup.

The generator itself should still be protected from excessive dust, heat and poor maintenance conditions. Fuel storage, ventilation, exhaust management and routine inspection all need to be included in the site plan.

Aggregate Production

Aggregate production depends heavily on reliable equipment operation. A stopped crusher can quickly stop screens, conveyors and stockpiling operations as well.

A properly sized generator provides the electrical foundation for the complete line. The goal is not simply to make electricity but to keep the entire production process working together.

Infrastructure Construction

Road construction, bridge projects and other infrastructure work can move from one location to another. Building a permanent electrical connection for every temporary work area is not always practical.

A mobile diesel generator gives the contractor another option: bring the power source to the equipment.

Remote Projects

For remote locations, the biggest benefit can be independence.

The project does not need to wait for a new grid connection before starting production, provided that the site has suitable fuel logistics and the generator is correctly configured.

Emergency and Temporary Power

The SPT series can also be considered where temporary industrial power is required. The trailer structure makes relocation easier than a conventional fixed generator installation.

That said, the exact electrical application should always be checked before connection. Industrial generators are not simply plug-and-play household equipment.

7. Outdoor Design, Transportation and Maintenance

One thing I like about a mobile generator is that transportation has been considered as part of the equipment rather than treated as a separate problem.

The SPT500MGS and SPT800MGS use trailer-mounted structures with adjustable towing connections. The official product description also lists leaf spring suspension, handbrake, tractor-connected air brake, four-corner mechanical supports, maintenance platforms and top lifting design.

Towing

The height-adjustable pin-type traction frame allows the generator to connect with towing vehicles of different heights. The structure also supports large turning angles, which can help when maneuvering around a jobsite.

Turn and brake indicators, standard towing-vehicle plugs and braking connection systems are included to support road transportation requirements.

Lifting

The top lifting design gives customers another option when loading, unloading or positioning the generator. This can be useful when a project site has cranes or lifting equipment available.

Maintenance

Daily maintenance should never be ignored simply because the generator is designed for tough conditions.

Engine oil, coolant, filters, fuel system condition, electrical connections, battery condition, ventilation and exhaust components all need regular inspection.

The three-side maintenance platforms and rear pedals help make access easier. This is particularly useful for technicians working on a generator that operates every day in a dusty quarry or mine.

Dust Management

Stone crushing creates dust, and dust can become a serious issue around engines and electrical equipment if the site is not managed properly.

The SPT generator housing is designed with dustproof and rainproof protection, but good site housekeeping is still important. Air filters and cooling systems need to be checked according to the actual site environment.

8. How We Handle Supply, Inspection and International Delivery

At Ganglong Heavy Industry Technology (Hefei) Co., Ltd., we approach international machinery supply as a complete process.

Our company was founded in 2013. Together with Hefei Ganglong International Trade Co., Ltd., we are involved in equipment-related business covering construction machinery, mining machinery, agricultural machinery and matching attachments.

Hefei Ganglong International Trade Co., Ltd. acts as our professional international trade arm. The team has experience serving customers in Asia, Africa, America and other international markets.

When we discuss a mobile diesel generator set with a customer, we first need to understand the intended application. A generator for a small standalone machine is not necessarily the same as a generator for a complete crushing and screening line.

Order Confirmation

We normally confirm the required model, power demand, equipment combination, voltage, transportation requirements, destination and other project details before the order is finalized.

For crushing and screening projects, the complete machine list is especially important. The generator needs to match the electrical load of the connected equipment.

Production Schedule

Production time depends on the model, configuration, order quantity and specific requirements. We confirm the delivery schedule before production.

This approach gives customers a clearer idea of when the equipment can be prepared for shipment instead of relying on a general delivery estimate.

Pre-Shipment Inspection

Before shipment, the machine is inspected for appearance, main functions, hydraulic and electrical systems, and basic operating performance according to the order requirements.

Standard documents and accessories are also prepared according to the confirmed order.

Payment

For international orders, payment is commonly arranged through T/T, such as a deposit before production and the balance before shipment. Exact payment terms are confirmed between both parties before the order is processed.

International Transportation

Complete generator sets can be shipped by sea for international projects. Suitable parts and accessories may be transported by air or express depending on their size, weight and destination.

The generator is protected and secured according to shipping requirements. Spare parts and loose accessories can be packed separately in cartons or wooden cases.

The final packing and delivery arrangement can be adjusted according to the destination, shipping route and customer requirements.

9. Frequently Asked Questions About SPT500MGS and SPT800MGS

What are SPT500MGS and SPT800MGS?

They are mobile diesel generator sets designed to provide independent electrical power for mobile crushing and screening production lines and other demanding outdoor applications.

How much power does SPT500MGS provide?

SPT500MGS has a rated power of 625 kVA / 500 kW. Its listed standby power is 688 kVA / 550 kW.

How much power does SPT800MGS provide?

SPT800MGS has a rated power of 912.5 kVA / 730 kW, with standby power listed at 1000 kVA / 800 kW.

What voltage do the generators provide?

The current specification lists 400 / 230 V output voltage, 50 Hz frequency, 0.8 power factor and three-phase four-wire connection mode for both models.

Can the generator power a mobile crushing plant?

Yes. The SPT500MGS and SPT800MGS are specifically designed to support mobile crushing and screening production lines. The correct model depends on the total power requirement of the selected production line.

Which generator is suitable for a Jaw Crusher and screening plant?

Sunward PSR's published configuration table lists SPT500MGS for an SP127JE + SP1560SE or SP2065SE combination, with a recommended generator power of at least 400 kW. The actual project configuration should still be checked before ordering.

Which generator is suitable for a larger crushing and screening line?

For the published SP127JE + SP300CE + SP1560SE or SP2065SE combination, Sunward recommends at least 750 kW generator power and lists SPT800MGS as the generator set model.

Can SPT500MGS and SPT800MGS work in hot climates?

The official product information lists temperature adaptability from -40°C to 50°C. However, the actual project should still consider ambient temperature, altitude, ventilation, fuel quality and maintenance conditions.

Are the generators suitable for dusty sites?

Yes. The generator housing is designed with rainproof and dustproof protection. However, regular filter inspection and good site maintenance remain important, especially in quarrying and mining environments.

Are the generator sets easy to move?

The SPT series uses a trailer-mounted design with leaf spring suspension, adjustable traction frame, braking connections and mechanical supports. This structure is designed to make towing and relocation more convenient.

How much fuel does the generator consume?

The published fuel consumption range is 60–100 L/h for SPT500MGS and 100–170 L/h for SPT800MGS. These are specification ranges rather than fixed consumption values. Actual fuel use depends on operating load and site conditions.

Can the generator be used with equipment from different manufacturers?

Potentially, yes, provided that the electrical parameters, power demand, control requirements and connection conditions are compatible. For a complete crushing line, the electrical system should be checked as a whole before the final configuration is confirmed.

Can you arrange international delivery?

Yes. Through our international trade team, we can discuss equipment supply, documentation, inspection, packing and international transportation according to the destination and project requirements.

10. Why We Focus on the Complete Power Solution

After working with industrial equipment buyers, I have learned that a generator is rarely purchased because someone simply wants a generator. Most customers are trying to solve a larger problem.

They want a quarry to keep producing.

They want a mobile crusher to operate in a remote mine.

They want a screening plant to keep separating aggregate without waiting for a permanent electrical connection.

They want to move the equipment to the next project without rebuilding the entire power system.

That is why I look at the SPT500MGS and SPT800MGS as part of a production system rather than as isolated machines.

The SPT500MGS gives customers a 500 kW rated power platform, while the SPT800MGS provides 730 kW rated power. Both are built around mobile operation, outdoor protection, towing convenience, maintenance access and industrial electrical output.

The published Sunward configuration data also makes the relationship with mobile crushing and screening equipment clear. The generator models can be matched with specific jaw, cone and screening combinations according to their power requirements.

For us, the practical part is helping the customer put these pieces together correctly.

We can discuss the raw material, crushing process, screening requirements, connected machines, required capacity, available power, working environment and transportation conditions before the equipment configuration is finalized.

That approach is much more useful than simply sending a product brochure.

Conclusion

The SPT500MGS / SPT800MGS mobile diesel generator sets are designed for customers who need independent industrial power in mobile crushing, screening, quarrying, mining, infrastructure and aggregate production applications.

SPT500MGS provides 500 kW rated power, while SPT800MGS provides 730 kW rated power. Both use diesel engines with turbocharging and electronic speed control, 400 / 230 V output, 50 Hz frequency, AVR excitation, and three-phase four-wire connection. The generator sets also use mobile trailer structures designed for towing, positioning, maintenance and outdoor operation.

The most important thing, however, is not choosing the generator with the biggest number. It is choosing the generator that properly matches the production line.

If you are running a Mobile Jaw Crusher and screening plant, a smaller power configuration may be enough. If you are operating a larger jaw-cone-screen production line, a higher-power generator may be required. The final choice should always come from the actual connected load, operating sequence and site conditions.

At Ganglong Heavy Industry Technology (Hefei) Co., Ltd., we support customers through this process from equipment selection and configuration discussion to inspection, documentation, packing and international transportation. Our goal is to make the equipment purchase practical from the first technical discussion to the point where the machine arrives at the project site.

For customers looking for a mobile diesel generator for crushing plant applications, an industrial diesel generator set for quarrying, or an independent power solution for remote aggregate production, the SPT500MGS and SPT800MGS provide two different power levels to work with a range of mobile crushing and screening configurations.