If you are evaluating a diesel generator supplier Vietnam buyers can approach for an industrial or commercial project, start by matching the generator set’s prime power, standby power, voltage and frequency to your site requirements. The models outlined here cover 20 kW to 3,000 kW, with listed options rated at 50 Hz. Use the specifications as a shortlist, then confirm operating conditions, local requirements and delivery scope with the supplier before placing an order.

For procurement teams, distributors, EPC contractors and facility engineers, a useful comparison goes beyond the headline kilowatt rating. A sound inquiry identifies the actual load profile, whether the generator will run as prime or standby power, the required electrical output, installation constraints and any documentation needed for the project. Those details help determine whether a listed model is a candidate—not whether it is automatically suitable for a specific site in Vietnam.

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

Diesel generator supplier Vietnam: compare available model examples

The following examples show the range of listed power ratings and equipment configurations. Prime and standby ratings are stated separately; do not treat the standby figure as the rating for continuous operation. Confirm the intended duty and applicable rating definition in the supplier’s quotation and technical documentation.

• KC-DC20G: 20 kW prime power and 22 kW standby power; 50 Hz; 400/230 V. It uses a 4B3.9-G1 diesel engine and KCI-20 alternator. The listed emission category is China Stage II. (P1)
• KC-W64Y88: 64 kW prime power and 70 kW standby power; 50 Hz; 400/230 V. It uses a WP4.1D80E200 diesel engine and KCI-64 alternator. The listed emission category is China Stage II. (P2)
• KC-P160: 160 kW prime power and 176 kW standby power; 50 Hz; 230/400 V. The listed engine is a Perkins 1106A-70TAG4 and the alternator is KCI-160. No emission category is specified in the available product data. (P3)
• KCV-282GF: 282 kW prime power and 310 kW standby power; 50 Hz; 400/230 V. It uses a TAD1342GE-B diesel engine and KCI-282 alternator. The listed emission category is China Stage II. (P4)
• KC-450: 450 kW prime power and 500 kW standby power; 50 Hz; 400/230 V. Its listed engine is KCV550, paired with a KCI-450 alternator. The listed emission category is China Stage II. (P5)
• KC-C650: 650 kW prime power and 700 kW standby power; 50 Hz; 400/230 V. It uses a KTA38-G2E diesel engine and KCI-650 alternator. The listed emission category is China Stage III. (P6)
• KC-S1118: 1,118 kW prime power and 1,229.8 kW standby power; 50 Hz; 400/230 V. Its listed engine is 6WTAA35-G313 and its alternator is KCI-1118. The listed emission category is China Stage III. (P7)
• KC-YC3000: 3,000 kW prime power and 3,300 kW standby power; 50 Hz; 380/220 V. It uses a YC16VC4900-D30 diesel engine and KCI-3000 alternator. The listed emission category is China Stage III. (P8)

These are product examples, not a complete selection or confirmation of export suitability. In particular, the listed emission categories are China categories; they do not establish compliance with any Vietnamese project or local requirements. Ask for documentation that applies to the specific model and intended installation.

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

Size the set around the load and operating duty

Begin with an electrical load schedule rather than selecting a generator from the largest connected load alone. List equipment that must run together, expected operating hours, starting or switching events, and any loads that can be shed. Have the project’s electrical engineer review demand and sequencing before choosing a rating. The product data provided here does not include load-step capability or motor-starting performance, so request that information if the project depends on those conditions.

For a standby installation, distinguish the load required during an outage from the set’s standby rating and confirm the supplier’s rating basis. For a prime-power application, state the planned operating pattern and load profile and ask the supplier to confirm the appropriate prime-power selection. The models above show different prime and standby values; for example, the KC-W64Y88 is listed at 64 kW prime and 70 kW standby, while the KC-P160 is listed at 160 kW prime and 176 kW standby. Those values should not be interchanged when preparing a design or comparing quotations. (P2, P3)

As a simple planning exercise, a facility engineer might group essential loads separately from non-essential loads and calculate which equipment must remain on during an outage. A commercial building, a production site or a project installation may have very different load mixes, even if their estimated totals appear similar. These examples are prompts for load assessment, not claims about installed customers or a guarantee that a particular model fits a given facility.

Check frequency, voltage and connection details

Frequency and voltage must match the project design and connected equipment. Every product example listed above is rated at 50 Hz. Most examples specify 400/230 V, while the KC-P160 lists 230/400 V and the KC-YC3000 lists 380/220 V. Do not assume that a 50 Hz set or one voltage configuration is right for your project simply because it appears in a model list. Confirm the required frequency, voltage, phase arrangement and connection with the EPC or electrical designer, and ask the supplier to confirm the exact offered configuration.

The product data for these models lists a three-phase, four-wire, Y connection for the stated configurations. Several models also specify an AVR (automatic voltage regulator) and a brushless three-phase AC synchronous alternator. Confirm these details against the current technical submittal for the exact model being quoted, especially if the project has sensitive loads or defined electrical interface requirements. (P1, P2, P3, P4, P5, P6, P7, P8)

A Vietnam project may have requirements that vary by site, owner, consultant or application. The available product data does not establish local electrical acceptance, emissions approval or other regulatory compliance. Include the project’s required standards and approval documents in the inquiry, and request written confirmation for the exact model and configuration.

Consider installation and equipment configuration

Before shortlisting, check the available plant-room or outdoor installation space, access route, lifting plan and connection points. Ask for confirmed dimensions and weight for the quoted configuration, along with any enclosure, acoustic, fuel-storage or environmental options required by the site. Do not infer these options from an engine or alternator model: the product details provided here do not specify a soundproof canopy, fuel tank capacity or complete installation package.

For larger equipment, request a review of foundation, ventilation, exhaust routing, cooling-air arrangements and maintenance access as part of the project design. These are site-planning questions, not supplied performance specifications. If operating conditions could affect selection, provide the relevant project information and ask the supplier to confirm the proposed configuration in writing.

What to include in a request for quotation

A well-prepared RFQ makes it easier to compare offers on equivalent terms. Include:

• Required prime power and standby power, with the expected duty and operating hours.
• A load schedule, including equipment that may start or operate simultaneously.
• Required frequency, voltage, phase and connection details from the project design.
• Installation location, available space, access and any environmental or acoustic requirements.
• The emission or regulatory documents required by the owner, project consultant or local authorities.
• Requested scope: generator set only, or any additional equipment, controls and installation items.
• Destination, preferred commercial terms, requested delivery timing and required shipping or customs documents.
• Inspection, testing, drawings, manuals and other submittals required for EPC or owner approval.

Ask for a model-specific quotation that identifies prime and standby ratings, engine and alternator models, electrical configuration, included accessories and exclusions. Request confirmation of which dimensions, weights and other figures are final for the quoted equipment. For a 50 Hz project, make the required frequency explicit; if your project calls for another frequency, ask whether a suitable configuration is available rather than assuming one from the listed examples.

Next step for Vietnam procurement teams

Use the models above to establish a preliminary power and configuration shortlist, then send the supplier your load schedule and project requirements. Ask for a written response confirming the proposed model, prime and standby ratings, frequency, voltage, connection, emission documentation, package scope and any items that remain subject to engineering review. Also confirm commercial details such as price, delivery, shipping documentation and after-sales arrangements directly; these are not specified in the product information presented here.

For an inquiry, provide the project location in Vietnam, application, required duty, load profile, electrical design basis and installation constraints. This allows a supplier to respond against your actual procurement and engineering criteria rather than relying on a generic kilowatt estimate.

FAQ

What can cause black smoke from a diesel generator?

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

How can I tell whether a generator that will not restart has a protection trip or hardware fault?

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

What is the routine maintenance interval for a diesel generator?

The first service for a new unit is at 50 hours, including oil, oil-filter and fuel-filter changes. Routine service is every 200–250 hours: change the oil and three filters; check the belt, coolant, battery, piping and fasteners; and clean the air filter and radiator. Carry out a full-unit inspection annually.

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

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

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

Residual magnetism may have been lost. Magnetization can restore it. Windings can lose magnetism more readily in damp conditions, so keep the generator room dry.