1. On-site performance
Typical symptoms on site
- If a generator set is selected only by sample capacity, the same crushers, pumps, or air compressors can become unstable after it reaches a high-altitude mine.
- When the temperature is high at noon or during continuous operation, the temperature of the unit will rise and there will be more alarms, so the site can only operate with reduced load.
- There is a lot of dust in the crushing area, and the air filter, radiator and air inlet quickly become dirty, and the maintenance frequency is forced to be advanced.
- During the rainy season, power distribution cabinets, connectors, control boxes or cable trenches become damp, causing a significant increase in tripping and false alarms.
2. Risk causes
Root cause in the power-system design
Many projects look at kW and kVA based on catalogs or standard working conditions, but do not take into account the real mining environment. High altitude will worsen engine air intake conditions, high temperatures will affect heat dissipation, dust will block air intake and filtration, and rain will affect power distribution and control stability.
Without derating and reserve margin for site altitude, peak temperature, dust intensity, and rainy-season conditions, a generator set that looks sufficient on the datasheet may have much less usable capacity on site.
Environmental adaptation is not an add-on. Air intake and exhaust, heat dissipation, rain and dust protection, filtration, distribution protection, and maintenance intervals all determine whether the generator set can run stably with the mine's operating rhythm.
3. Scope of influence
Production, fuel, maintenance, safety and environmental risks all grow
- The production load band is not full, and some equipment needs to be shut down or started at staggered peaks on site, disrupting the rhythm of trial production.
- When a generator set runs for a long time near the limits of heat, dust, and high load, fuel consumption, wear, alarms, and maintenance costs all rise.
- Distribution faults caused by rain and dust can make troubleshooting difficult, and it is easy to repeatedly find the cause on site among generators, equipment and lines.
- The expansion plan looked like the power capacity was ready, but when it was actually put into production, it was shut down repeatedly due to environmental degradation and protection actions.
4. How to avoid before construction
What to confirm before procurement or expansion
- Before selecting, provide the altitude, maximum ambient temperature, rainy season conditions, dust sources, unit placement and ventilation conditions together. Don’t just give the equipment power.
- Confirm the usable generator-set power and reserve margin under the site's toughest operating condition, and allow a larger margin or use a multi-generator configuration if necessary.
- Simultaneously plan the air intake and exhaust, radiator cleaning space, rainproof shed, distribution cabinet protection, cable routing and dust filtration maintenance cycle.
- Before putting into production, record the load, voltage, temperature, alarm and filter element status in the actual environment to confirm that it does not look normal only under no load or low load.
5. On-site confirmation information
Site information needed for an engineering review
- mine site elevation, maximum and common ambient temperatures, rainy season time, dust sources and site photos.
- The planned installation location for the generator set: outdoors, inside a shed, inside a container, or near the crushing line, access road, or material yard.
- List of main loads, planned simultaneous operation of equipment, continuous operating hours per day and whether long-term self-generation is required.
- Alarm records, temperature records, filter element replacement frequency, power distribution cabinets and cable joint photos of existing units.
