If you are comparing a generator set supplier for a project in Saudi Arabia, start by matching the generator’s prime power, standby power, frequency and voltage to the site’s electrical design and operating profile. The diesel generator set examples below cover 20 to 3,000 kW prime power and are listed at 50 Hz, with stated voltages of 400/230V, 230/400V or 380/220V depending on model. Treat these as reference options—not a substitute for confirming your project’s specifications, local requirements and site conditions before requesting a quotation.

Illustrative generator photo; exact enclosure, frequency and configuration may differ from the model discussed.

Generator set supplier selection: compare ratings before models

A model name or headline power rating alone is not enough to select a genset. First establish the load the unit must serve and whether it is intended for regular operation or backup. Then confirm the site’s required frequency and voltage against the specific model data. The product examples here have prime and standby ratings, but none lists a kVA rating. If your project documents specify kVA, ask the supplier to confirm the corresponding rating rather than estimating it from the kW figure.

Use these steps to create a shortlist:

• Calculate the load requirement. Add the loads that will operate at the same time, then account for equipment that starts under load. Consider motors, pumps and other large starting loads separately; a simple sum of running loads may not describe the required generator capacity. Have the project electrical engineer verify the calculation and any required design margin.
• Define the duty. Select around the prime-power rating when the generator is intended to supply power for regular or varying operation. Consider the standby rating for a backup role, but confirm the applicable rating definition and operating limitations with the supplier. Do not treat the standby figure as the normal continuous operating rating.
• Match frequency and voltage. The listed examples are 50 Hz. Voltage varies by model, so check the exact product specification against the site design rather than assuming all units have the same output. Confirm phase, wiring arrangement and any connection requirements with the electrical contractor.
• Check physical and operating conditions. Review the stated dimensions and weight for the shortlisted model, then confirm access, installation space and site requirements. Ask the supplier and project team to check any conditions that could affect selection or installation, including the site environment and fuel arrangements.

Illustrative generator photo; exact enclosure, frequency and configuration may differ from the model discussed.

50 Hz diesel generator set options by prime power

The following examples show the breadth of the listed range. Prime and standby power are shown as stated in the product specifications; voltage order is retained for each model.

• KC-DC20G: 20 kW prime, 22 kW standby; 50 Hz; 400/230V. Uses a 4B3.9-G1 diesel engine and KCI-20 alternator. The listed speed is 1500 rpm, and the governor is mechanical.
• KC-W64Y88: 64 kW prime, 70 kW standby; 50 Hz; 400/230V. It uses a WP4.1D80E200 diesel engine and KCI-64 alternator, with electronic governing and a listed speed of 1500 rpm.
• KC-P160: 160 kW prime, 176 kW standby; 50 Hz; 230/400V. This model lists a Perkins 1106A-70TAG4 diesel engine and KCI-160 alternator. Its stated power factor is 0.8 lagging.
• KCV-282GF: 282 kW prime, 310 kW standby; 50 Hz; 400/230V. The listed engine is a Volvo TAD1342GE-B and the alternator is KCI-282.
• KC-450: 450 kW prime, 500 kW standby; 50 Hz; 400/230V. It lists a KCV550 diesel engine, KCI-450 alternator and 0.8 lagging power factor.
• KC-C650: 650 kW prime, 700 kW standby; 50 Hz; 400/230V. Its listed engine is a KTA38-G2E and its alternator is KCI-650.
• KC-S1118: 1,118 kW prime, 1,229.8 kW standby; 50 Hz; 400/230V. It uses a 6WTAA35-G313 diesel engine and KCI-1118 alternator; its stated power factor is 0.8 lagging.
• KC-YC3000: 3,000 kW prime, 3,300 kW standby; 50 Hz; 380/220V. The product data lists a YC16VC4900-D30 diesel engine and KCI-3000 alternator. Its dimensions and weight are identified as reference values.

These examples are not interchangeable simply because two units have similar power ratings. Compare the exact voltage, prime and standby ratings, engine and alternator details, dimensions and installation constraints for each candidate. Where a project needs a different frequency, voltage, enclosure, control arrangement or rating format, request written confirmation of the proposed configuration. The listed product data does not establish that other configurations are available.

Prime power, standby power and load sizing

Prime power and standby power serve different selection purposes. In the examples above, standby ratings are higher than prime ratings. That does not mean the higher number should be used as the basis for every operating plan. Ask the supplier to explain the rating definitions and permitted duty for the specific model, and compare that information with the expected hours of use, load profile and backup strategy in the project specification.

For sizing, prepare a load schedule showing each major item, its running demand, starting method and whether it must operate at the same time as other loads. Identify essential loads separately from loads that can be shed during an outage. If the generator will support a facility with large motors or changing demand, have the electrical engineer assess starting and transient requirements. Do not select a unit only by adding nameplate kW figures without checking how loads start and operate together.

Also confirm whether the project needs a single generator or a wider power arrangement. The product data provided here does not specify parallel operation, automatic transfer switch (ATS) supply, control-panel options or synchronization capability. Treat these as scope questions for the inquiry, not as assumed features.

What Saudi project buyers should confirm

The model examples are stated as 50 Hz products, but the correct frequency and voltage for a particular Saudi project must come from its approved electrical design and equipment requirements. Confirm them with the EPC contractor, consultant or facility engineer before choosing a model. The listed options include different voltage orderings and one 380/220V example, so a quick check of the model-specific value matters.

For a procurement package, request a model-specific technical submittal and compare it with the project requirements. Ask for confirmation of the offered prime and standby ratings, voltage, frequency, phase and connection arrangement. The listed products describe three-phase, four-wire, Y connection and AVR (automatic voltage regulator) on their specifications; verify that the proposed model and final offer meet the design documents.

Ask the supplier to confirm applicable emission documentation and local compliance for the project. The product data identifies China Stage II emission for some models and China Stage III emission for others; one model has no emission classification listed. These labels do not establish compliance with Saudi requirements. Obtain the documents requested by the project and relevant authorities before placing an order.

The product data also lists an IP23 protection class, H insulation class and brushless, self-excited alternators with copper windings for the examples. Check the exact model’s specification and clarify whether additional protection or a different installation arrangement is required for the planned location. Do not assume an enclosure, soundproof canopy or other unlisted configuration is included.

Prepare an actionable supplier inquiry

A complete inquiry helps the supplier respond against the actual project scope. Include the required prime power and standby power, expected duty, frequency, voltage, load schedule and site installation constraints. Attach the relevant electrical specification or single-line diagram where available, and identify any equipment with high starting demand.

Request a technical offer that identifies the exact model and confirms the ratings, engine, alternator, dimensions and weight. Ask for any missing commercial and project information needed for evaluation, such as price, delivery terms, warranty, service arrangements, documentation, fuel-system scope, controls, ATS, enclosure and emissions evidence. Those details are not established by the model data listed in this article, so they should be confirmed in writing rather than assumed.

For a Saudi project, also ask the supplier and project team to confirm what needs to be checked for the intended site, installation, commissioning and local approval process. Keep technical compliance separate from general catalogue matching: a generator can appear to fit a power range and still require a different voltage, configuration or documented approval for the project.

To request a relevant proposal, send the required load and duty profile, project frequency and voltage, site location, installation constraints and required documentation. Ask the supplier to identify the closest model against those inputs and list any deviations or items that remain unconfirmed. That gives procurement, engineering and the EPC team a clearer basis for comparing offers without relying on headline power alone.

FAQ

What can cause black smoke from a generator set?

Black smoke indicates incomplete combustion. Possible causes include a clogged air filter restricting intake, excessive fuel injection, poor injector atomization, a sudden excessive load, or poor-quality diesel. Clean the air filter, use good-quality diesel, inspect the fuel-injection system, and avoid prolonged operation under excessive load.

After an automatic shutdown, how can I tell whether protection has tripped or hardware has failed?

First check the controller's fault-code history. If overspeed, high-temperature or low-oil-pressure protection has activated, manually reset the protection after addressing the cause. If there is no fault code, check the battery and fuel system.

Why might a brushless generator have no voltage output after being stopped for a while?

Loss of residual magnetism may be the cause. Magnetization can restore it. Windings in damp environments can lose magnetism more easily, so keep the generator room dry.

What is the routine generator set maintenance interval?

The stated schedule is an initial service at 50 hours, including oil, oil-filter and diesel-filter changes. Routine maintenance is every 200–250 hours: change the oil and filters, check the belt, coolant, battery, pipes and fasteners, and clean the air filter and radiator. Carry out a full-unit inspection annually.

What should I check if a generator set has high coolant temperature or shuts down on a high-temperature alarm?

Check the coolant level, radiator blockage, fan speed, thermostat and water-pump operation. Clean the radiator cooling system and resolve blockage or restricted coolant circulation.