Diesel gensets for a Vietnam project should be shortlisted by matching the generator’s prime or standby rating to the site’s load, then checking that frequency, voltage, emissions information and installation constraints fit the project. The model range shown here covers 20 kW to 3,000 kW, with listed examples rated at 50 Hz. Use the product data below to establish a shortlist, then confirm site requirements and the intended duty with the supplier before requesting a final configuration.

For procurement managers, distributors, EPC contractors and facility engineers, the central question is not simply which genset has the highest output. It is whether the selected rating and electrical configuration will serve the actual load profile, and whether the complete package can be installed and operated as planned. The checklist and model examples below provide a starting point for that evaluation.

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

Diesel gensets: start with load and duty

Build a load schedule before comparing models. Record each load’s running demand, whether it has a motor or other starting surge, and whether loads will start together or in sequence. Include essential and non-essential loads separately. This lets the project team assess the required running capacity and the effect of starting loads, rather than sizing from a single total that may not reflect real operating conditions.

Next, clarify the operating duty. The listed products provide both a prime power and a standby power figure. For example, KC-DC20G is rated at 20 kW prime and 22 kW standby, while KC-C650 is rated at 650 kW prime and 700 kW standby. Treat these as separate ratings in your comparison. Do not select a unit on the standby figure alone if the planned operating profile requires a different rating; ask the supplier to confirm the appropriate rating for the expected hours, load pattern and use case.

A useful initial selection process is:

• List the loads that must remain powered and identify which can be shed.
• Note motor starting, transformer energization and other large load changes for engineering review.
• Establish whether the genset is for backup, regular operation or another duty, and communicate that clearly in the RFQ.
• Compare the required load against the prime rating, not just the headline standby figure.
• Ask for confirmation of any derating assumptions relevant to the project site and installation.

These steps are applicable whether evaluating a compact unit for essential loads in a small facility, a mid-range set for a larger building or project site, or a high-capacity set for a substantial industrial load. The application example does not determine capacity by itself: the load schedule and duty requirement do.

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

Compare available 50 Hz model examples

The following models illustrate the available power range. Ratings are in kW; kVA figures are not provided in the listed product data.

• KC-DC20G: 20 kW prime, 22 kW standby; 50 Hz; 400/230 V; 4B3.9-G1 diesel engine; mechanical governor. Listed China Stage II emission classification.
• KC-W64Y88: 64 kW prime, 70 kW standby; 50 Hz; 400/230 V; WP4.1D80E200 diesel engine; electronic governor. Listed China Stage II emission classification.
• KC-P160: 160 kW prime, 176 kW standby; 50 Hz; 230/400 V; 1106A-70TAG4 diesel engine. The product data does not state an emission classification for this model.
• KCV-282GF: 282 kW prime, 310 kW standby; 50 Hz; 400/230 V; TAD1342GE-B diesel engine. Listed China Stage II emission classification.
• KC-450: 450 kW prime, 500 kW standby; 50 Hz; 400/230 V; KCV550 diesel engine. Listed China Stage II emission classification.
• KC-C650: 650 kW prime, 700 kW standby; 50 Hz; 400/230 V; KTA38-G2E diesel engine. Listed China Stage III emission classification.
• KC-S1118: 1,118 kW prime, 1,229.8 kW standby; 50 Hz; 400/230 V; 6WTAA35-G313 diesel engine. Listed China Stage III emission classification.
• KC-YC3000: 3,000 kW prime, 3,300 kW standby; 50 Hz; 380/220 V; YC16VC4900-D30 diesel engine. Listed China Stage III emission classification.

Emission labels here reproduce the product data’s China Stage II or China Stage III classifications. They should not be treated as confirmation of compliance with Vietnam requirements. Ask the project’s compliance team and supplier to verify the applicable local requirements for the intended installation.

Confirm frequency and voltage before comparing price

Frequency and voltage are project-interface requirements, not minor options. All examples above are listed at 50 Hz, but the voltage is not uniform across the range: most examples are 400/230 V, KC-P160 is 230/400 V, and KC-YC3000 is 380/220 V. Confirm the required frequency, line and phase voltage, wiring arrangement and connection to the site distribution system before finalizing a model.

For a Vietnam inquiry, state the site’s required electrical values explicitly rather than assuming they match a catalogue example. If the project requires 60 Hz, a different voltage, or a particular connection arrangement, ask whether a suitable configuration is available and request its complete rating data. The product examples in this guide do not establish the availability of those alternatives.

Some listed models specify a three-phase, four-wire, Y connection. For example, KC-DC20G and KC-P160 list this arrangement. Check the specific model’s data and the project’s electrical design; do not assume that a connection detail or voltage shown for one model applies to every capacity.

Check installation and operating constraints

Capacity and electrical compatibility are only part of the selection. Before issuing an RFQ, check the plant room or outdoor installation area, access route, foundation and lifting plan. Some product sheets give dimensions and weight, but the information is not complete or uniform across all the models in this range. Request the exact overall dimensions, operating weight and any configuration-specific drawings for the proposed unit before approving the layout.

Noise can also affect the site plan. Several listed models give a noise figure of 102 dB at LP7M. Confirm the measurement basis and configuration with the supplier, and determine whether the project needs a soundproof canopy or other acoustic provisions. Do not assume an enclosure or a particular noise outcome is included unless it is confirmed in the quotation.

For operation and maintenance planning, identify who will carry out routine inspections, keep consumables available and document operating hours. The general maintenance guidance in the supplied information calls for a first service after 50 hours on a new unit, routine maintenance every 200–250 hours, and a comprehensive inspection annually. Routine items include oil and filter changes, checks of belts, coolant, battery and piping, fastener checks, and cleaning the air filter and radiator. Confirm the schedule and requirements for the specific selected model before establishing the site maintenance plan.

Build a procurement-ready RFQ

A precise request reduces avoidable back-and-forth and helps suppliers respond against the same project assumptions. Include:

• Required prime and standby power in kW, plus the load schedule and expected operating profile.
• Site frequency and voltage, phase arrangement, and any distribution-interface requirements.
• The project’s emissions or other compliance requirements, stated for the installation location.
• Installation conditions and constraints, including available space, access and acoustic needs.
• Required controls, transfer equipment, fuel storage and other package details, specifying whether each is in scope or still to be confirmed.
• Documentation requested for review, such as model-specific ratings, dimensions, weight and connection information.
• The project location and required commercial information, including price, delivery terms and availability, which must be quoted and verified for the specific inquiry.

The product information presented here does not specify prices, delivery periods, warranty terms, certifications, fuel tank capacity, runtime, controls, or service coverage. Ask the supplier to state these items in writing for the exact configuration. For Vietnam projects, also ask the responsible project team to confirm any local regulatory, electrical and site-approval requirements; country context alone is not evidence that a particular model meets them.

Request a model recommendation

Send the load schedule, required duty, frequency and voltage, site conditions and project compliance criteria with your inquiry. Include the preferred capacity range if already established, but ask the supplier to validate the model against the actual load and installation rather than selecting only from the headline kW figure. Request a model-specific technical submission that identifies prime and standby ratings, electrical configuration, dimensions, weight, emission information and any excluded package items.

To begin a shortlist, compare the 20–3,000 kW 50 Hz examples above against your project requirements. If the site needs a different frequency, voltage, emission classification or package configuration, identify that clearly in the inquiry and request confirmation before the model is included in the tender or procurement specification.

FAQ

What can cause black smoke from a diesel genset?

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

A genset stopped automatically and will not restart. How can I check whether protection acted?

First review the controller’s fault-code history. If overspeed, high temperature or low oil pressure protection has triggered, the protection may need to be manually reset. If there is no fault code, check the battery and fuel system.

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

The FAQ identifies loss of residual magnetism as a possible cause; magnetization may restore it. Windings can lose magnetism more readily in a damp environment, so keep the generator room dry.

What should be checked if a genset has a high-temperature alarm or stops?

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