1000 kVA power class
1000 kVA Diesel Generator (800 kW)
A 1000 kVA diesel generator delivers 800 kW at a 0.8 power factor. It is the standard building block of medium-sized standby installations: data centres, airports, hospitals and industrial plants buy this rating in multiples, so the questions that matter are how many sets, how they are paralleled, and how the fuel and heat are handled.
Ratings
Ratings at a glance
| Parameter | Value |
|---|---|
| Prime power (PRP) | 1000 kVA / 800 kW |
| Emergency standby (ESP) | 1100 kVA / 880 kW |
| Rated voltage and frequency | 400/230 V, 50 Hz, or 11 kV generation where the site is large |
| Rated speed | 1500 rpm, four-pole (1800 rpm for 60 Hz) |
| Full-load current | 1443 A per phase at 400 V |
| Typical duty | Standby in multiples for technical facilities; prime power for utility and rental duty |
Specification envelope
What is normally inside a 1000 kVA set
| Item | Typical range | Why it matters |
|---|---|---|
| Engine | V12 or large six-cylinder, 24-32 L class, electronic governor | Block load acceptance, heat rejection and service intervals |
| Alternator | Brushless, class H insulation, IP23, AVR controlled, permanent magnet exciter common | Voltage dip and recovery when a large step is applied |
| Fuel consumption | 144-162 L/h at 75% load (600 kW) | Bulk storage, transfer pumps and delivery planning |
| Fuel autonomy | 1200-1350 L per 8 h at 75% load; bulk tank for longer autonomy | Whether a day tank in the plant room is required |
| Noise at 7 m | 70-76 dB(A) containerised, 72-80 dB(A) canopy | Planning conditions and working environment |
| Weight | 7.5-9.5 t skid, 13-17 t containerised with tank | Transport, lifting and foundation design |
| Footprint | Approximately 6.5-7.5 m x 2.4 m canopy, or one 20-40 ft container | Compound layout and radiator spacing between sets |
Sizing
Design decisions that come with 1000 kVA
- How many sets. Three or four 1000 kVA sets in parallel are typical for a data hall or a hospital campus, so that one set can be out of service and the load still carried.
- Low or medium voltage. Generating at 400 V and stepping up, or generating at 11 kV directly, is a cost comparison based on distance and load. Both are in use, and the choice changes the alternator and switchgear.
- Heat and ventilation. Radiator airflow for one set is significant; for a bank of sets in a compound the recirculation between them has to be modelled rather than assumed.
- Fuel system. At 144-162 L/h, one set consumes a tanker load in a few days of continuous running. Bulk storage, bunding, level monitoring and a day tank are normally part of the scope.
- Testing on load. Commissioning includes load bank testing, and for data centre duty the step response is measured with the UPS load in place.
Applications
Typical 1000 kVA applications
-
Data centres
Multiple sets in N+1 or 2N, tested on load, with the fuel and cooling systems designed as a single package.
-
Hospitals and campuses
Campus-wide standby, with the essential and non-essential buses separated and the transfer sequence staged.
-
Airports and transport
Terminal services, airfield lighting and ground support equipment, usually under strict transfer time requirements.
-
Oil, gas and industrial plants
Prime power or standby for process plants, where air filtration, fuel quality and remote monitoring are specified.
Options
Options usually specified at 1000 kVA
| Option | What it changes |
|---|---|
| Parallel control and switchgear | Number of sets, load sharing, synchronising, reverse power protection and load shedding |
| Container specification | Acoustic grade, tank inside or below, control room space, cable and pipe entry positions |
| Remote cooling | Radiators mounted away from the set, used where the compound cannot remove the heat locally |
| Day tank and transfer system | Fuel delivery to the set under level control, with alarms and bunding |
| Monitoring and SCADA | Load profile, run hours, fuel level and alarms reported to a control room |
Questions
1000 kVA questions we are asked
How many amps does a 1000 kVA generator produce?
1443 A per phase at 400 V, and about 1588 A at the 1100 kVA standby rating. At this current level busbar and cable runs are usually short, and many installations step up to medium voltage rather than distribute at 400 V.
How much fuel does a 1000 kVA set use per day?
At 75% load, which is 600 kW, consumption runs 144-162 L/h, so about 3.5-3.9 cubic metres per day of continuous running. Standby duty with infrequent outages consumes far less, but tank size is normally set by the required autonomy, not by the annual average.
How many 1000 kVA sets do I need for 2 MW of load?
A 2 MW bus would be met by three 1000 kVA sets in N+1, since two sets cover 1.6 MW of prime power and the third provides redundancy, or by four sets where the load has to run with two out of service. The exact figure follows from the duty rating and the redundancy requirement rather than the arithmetic alone.
Is a 1000 kVA set available in a container?
Yes, generally in a 20 ft or 40 ft container depending on the tank and control room requirement. The container adds weight and length, and it needs a prepared slab, drainage and clear door access, but it protects the machine and keeps the fuel and controls inside one enclosure.
How much space is needed between two sets?
Enough that the hot air from one radiator cannot be drawn into the other. That distance is set by the airflow figures of the specific radiators rather than a fixed rule, and it is normally shown on the compound layout drawing issued with the quotation.
Related
Other pages in this range
-
Diesel generator sets
Ratings, form factors and the choices that shape a specification.
-
800 kVA
640 kW, for district cooling and industrial loads.
-
2000 kVA
1600 kW, the largest single-set class in this range.
-
Request a quote
Send the load list and site conditions, and we reply with the rating and build options.
Planning a 1000 kVA installation?
Send the load schedule, the redundancy requirement and the site layout. You will get a rating, the number of sets, and the fuel and cooling package that goes with them.