In short. A mining power project starts by defining duty: continuous prime power, standby behind a weak grid line, or a temporary supply for a development phase. That decision sets generator rating, redundancy, maintenance planning and fuel logistics. Credible project records then describe the major loads, site conditions and service arrangements, and support any fuel, reliability or production claims with operating records rather than general expectations about the equipment.
Define the duty before choosing equipment
Quarries and mines in Telangana and Andhra Pradesh use generators in three ways, and each is a different project. A remote site with no grid needs a continuous or prime power plant that will run most of the day for years. A site on a long DISCOM spur needs standby generation that starts often and may run for hours during monsoon line faults. A new pit, a dewatering campaign or a plant expansion may need temporary power for months. The manufacturer’s rating type must match the duty: a standby rating applied to continuous operation shortens engine life and voids the basis of the warranty, while a prime-rated set bought for occasional standby is an expensive choice. Mining and quarrying power and mining microgrids explain how the duty affects the wider system.
| Duty | Generator rating basis | Redundancy approach | Maintenance implication |
|---|---|---|---|
| Continuous or prime power | Prime or continuous rating, load factor limits | N+1 sets so one can be serviced | Service every few weeks of running; overhaul planned in the operating budget |
| Standby behind a weak grid | Standby rating, checked for long outage runs | Single set or N+1 by criticality | Starting system and fuel quality are the main risks |
| Temporary or campaign | Rental fleet rated for the duty and duration | Spare set or rapid replacement agreed | Service scheduled within the rental contract |
Running hours drive the maintenance plan
A prime power set at a mine may run 18 to 22 hours a day. At that rate, service intervals expressed in running hours arrive every two to three weeks, and the hours that bring a top overhaul arrive within a few years. The project should therefore plan service windows from the start, which in practice means enough generating sets that one can be stopped without cutting production.
Days between services = Service interval (h) / Daily running hours (h per day)
The service interval comes from the manufacturer’s maintenance schedule for the duty and fuel quality, and daily running hours from the site’s operating pattern. Worked example (illustrative): with a 500-hour oil service interval and 20 running hours a day, each set needs servicing every 25 days. A plant of three sets therefore has a set out for service roughly every eight to nine days, and the remaining two must carry the production load during each window. Dusty conditions may shorten the interval; it must be confirmed against the engine maker’s guidance and oil analysis.
Site conditions that change the design
Crusher dust, ambient temperatures above 45 °C, vibration from blasting and heavy vehicles, and long distances to the nearest workshop all shape a mining project. Generators need heavy-duty air cleaners, radiators sized for high ambient, and placement upwind of dust sources. Multi-set installations near camps also face cumulative noise, and acoustic treatment must not starve the sets of cooling air. Controls should make the plant understandable at a glance: a clear display of which sets are running, their load and fault history helps a small site team act correctly, and remote monitoring lets our service engineers see a developing problem before travelling. See cooling and radiator service.
Fuel, reliability and production claims
Statements such as reduced fuel use, higher availability or improved production are only meaningful against a baseline. A credible mining record would show litres consumed per kWh or per tonne before and after, measured on the same basis over comparable periods, and would note what else changed, such as production rate or ore hardness. Availability claims need recorded outage events, not impressions. Conditions at one mine rarely transfer directly to another, so measured results should be separated from assumptions. No approved mining case is presented here at present; cases will be added when records and permissions are in place. Related project categories include construction and infrastructure and temporary and bridging power.
Common mistakes
- Running standby-rated sets as the mine’s main power source. Engines wear prematurely and failures fall outside the basis of the manufacturer’s rating.
- Installing exactly enough generators for production. Every service window becomes a production loss, so services are deferred and reliability falls.
- Following clean-site service intervals at a dusty quarry. Air filters and radiators clog and the sets derate or trip in the hottest months.
- Reporting fuel savings without a measured baseline. The figure cannot be defended and decisions based on it go wrong.
What to send us
Send the major load list with crusher, conveyor and pump motor data, the daily operating pattern, the duty you need (continuous, standby or temporary), site location and access, ambient and dust conditions, existing generator details with running hours, and a year of fuel records if available. Send your application details.
Questions engineers ask
What is the difference between prime and standby rating for a mine?
Prime rating allows unlimited running hours at a variable load with an average load factor limit set by the manufacturer. Standby rating assumes limited annual hours during utility outages. A mine running generators as its main supply should use prime or continuous rating.
How many generators should a remote mine run?
Enough to carry the production load with one set out for service, which usually means N+1 at minimum. Using several medium sets also lets the plant match generation to load across shifts.
Can we monitor mine generators remotely?
Yes. Modern controllers report load, running hours, fuel level, alarms and fault history over cellular or satellite links. Remote monitoring shortens response time but does not replace site inspections and scheduled service.
How do we prove a fuel saving after a generator upgrade?
Measure fuel consumed and energy delivered over a comparable period before and after, using calibrated flow meters or reconciled tank dips and the controller’s kWh records. Note any changes in production rate or load mix that could affect the comparison.
Generators by rating
- Under 15 kVA generators
- 15–50 kVA generators
- 50–125 kVA generators
- 125–250 kVA generators
- 250–500 kVA generators
- 500–1000 kVA generators
- 1–2 MVA generators
- 2 MVA and above generators
Technical content reviewed by Srinivas Reddy, Managing Partner, Reddy Generators. Last updated 19 October 2026.