Perkins 4012-46TWG2A Genset Engine – 1253–1385 kVA

The Perkins 4012-46TWG2A is a 45.8-litre V12 diesel engine for high-output generator sets operating at 1500 rpm / 50 Hz or 1800 rpm / 60 Hz. The principal DGKM8530 / DGKM1005 configuration is rated at 1253 kVA prime and 1385 kVA standby at either speed, corresponding to 1002 kWe and 1108 kWe at a stated power factor of 0.8.

The defining feature of the TWG2A is its turbocharged, air-to-water charge-cooled architecture. Instead of rejecting charge-air heat directly through an air-to-air cooler, the compressed intake air transfers heat through a liquid cooling circuit. The applicable coolant circuit, heat exchanger, pump arrangement and final heat-rejection package must be confirmed for the exact Build List.

TWG2A Identifies the Charge-Cooling Architecture

The TWG2A suffix should not be confused with the air-to-air charge-cooled TAG2A. Both models use the Perkins 4012 V12 platform, but their charge-air cooling paths, package interfaces and published ratings are different.

Air-to-water charge cooling can support installations where the charge cooler must be integrated into a liquid-based heat-rejection system rather than placed directly in a large ambient-air stream. The final system is not independent of ambient temperature: the absorbed heat must still be rejected through the approved radiator, heat exchanger or site cooling system.

Same Published Output at 50 Hz and 60 Hz

The principal DGKM8530 / DGKM1005 Build List family is identified as a dual-speed configuration. Unlike the related TAG2A ratings, the published generator output remains the same at 1500 rpm and 1800 rpm.

The dual-speed engine Build List does not make a complete generator set automatically switchable between frequencies. Alternator winding, controller settings, governor configuration, voltage regulation, protection thresholds and connected loads must match the selected speed and frequency.

Frequency Information Required Before Release

• Required operating frequency: 50 Hz or 60 Hz
• Required rated speed: 1500 rpm or 1800 rpm
• Alternator manufacturer, model and winding arrangement
• Output voltage and stated power factor
• Generator-set controller and governor interface
• Protection settings applicable to the selected frequency
• Whether the project is a new build or an engine replacement

Engine and Generator Output

The generator kVA and kWe figures are not identical to the mechanical engine power. Gross engine power describes output before stated auxiliary deductions, while net engine power reflects the published usable engine output for the package calculation.

Why Final Genset Ratings May Differ

A generator-set manufacturer may release a different final kVA output because alternator efficiency, power factor, voltage, temperature rise, altitude, ambient temperature and package losses affect the complete-set rating.

Before comparing suppliers, identify whether the quoted number refers to gross engine power, net engine power, generator kWe, generator kVA, prime duty or standby duty.

Prime and Standby Suit Different Projects

The 1253 kVA prime rating is intended for projects where the generator carries an approved variable-load operating profile, including installations where utility power is unavailable or the generator is used regularly.

The 1385 kVA standby rating is intended for backup operation where another source normally supplies the load. Annual operating limits, load factor, overload allowance and maintenance requirements should follow the rating documentation applicable to the exact engine and generator-set configuration.

TWG2A Compared with the Air-to-Air TAG2A

The Perkins 4012-46TAG2A uses air-to-air charge cooling, while the TWG2A uses air-to-water charge cooling. The suffix difference identifies cooling architecture rather than merely indicating a higher or lower power tier.

The TAG2A should not be selected only because its published kVA output is higher, and the TWG2A should not be selected only because it uses a liquid charge-cooling path. Engine-room layout, cooling infrastructure, radiator airflow, ambient temperature, service access and required electrical output must be reviewed together.

Main Build Lists: DGKM8530 and DGKM1005

DGKM8530 and DGKM1005 are both valid original Perkins Build Lists for the confirmed dual-speed TWG2A configuration. They are parallel Build Lists rather than an original-and-replacement pair.

DGK8530 and DGK1005 are the corresponding shortened designations used for engines from later production batches.

The complete Engine Serial Number remains necessary even when the Build List is known. The ESN identifies the production record, cooling package, installed options, supplied accessories and component revisions of the individual engine.

Information to Record from the Nameplate

• Complete model: 4012-46TWG2A
• Complete Build List beginning with DGK or DGKM
• Complete Engine Serial Number
• Rated speed configured for the project
• Temperate or tropical cooling package
• Electro unit or ElectropaK configuration
• Original generator-set manufacturer and model

The engine nameplate is normally mounted on the rocker-cover or timing-case area. Use a clear photograph of the complete plate rather than relying on numbers cast into the cylinder block or other components.

Other TWG2A Builds Require Separate Rating Confirmation

The 4012-46TWG2A designation also covers additional E/P, E/U and India-specific Build Lists. The source identifies their general speed direction but does not provide prime or standby output for these versions.

The 1253/1385 kVA ratings should not be transferred automatically to DGKM6005, DGKM6060, DGKM0117 or their India-specific variants. Each quotation should follow the rating documentation for the exact Build List.

Air-to-Water Charge-Cooling Interfaces

A TWG2A integration review must define how the charge-cooling liquid circuit is incorporated into the complete cooling system. The model name alone does not confirm whether the circuit is combined with another coolant loop or uses a separately controlled heat-exchange path.

Charge-air temperature directly affects combustion air density and engine output. The coolant inlet temperature and heat-rejection capacity must therefore be controlled within the limits of the approved engine rating.

Electronic Governing Without a Full Engine ECM

The engine uses mechanical unit injection with an actuator and electronic governor. No full engine-mounted ECM is stated in the supplied specification.

This distinction affects control-panel integration, troubleshooting and spare-parts selection. Start, stop, protection, alarm and communication functions may depend on the generator-set controller and external wiring rather than an engine ECM.

V12 Mechanical Platform

The 4012-46TWG2A uses a 12-cylinder, 60-degree vee architecture. It is turbocharged, air-to-water charge cooled and uses direct fuel injection.

Temperate and Tropical Package Selection

Temperate and tropical cooling packages are available. The tropical package is intended for a higher ambient-temperature design point and has a slightly higher stated dry weight.

No package dimensions are provided in the supplied information. Foundation, enclosure, lifting and transport planning should therefore use the general-arrangement drawing for the approved Build List and cooling package rather than dimensions copied from another 4012 model.

Cooling Information Required Before Project Release

• Temperate or tropical package
• Maximum site ambient temperature
• Site altitude and expected derating
• Charge-cooler coolant inlet condition
• Radiator or heat-exchanger arrangement
• Cooling-air inlet and hot-air discharge route
• Permitted enclosure pressure restriction
• Coolant specification and expansion arrangement

Electro Unit and ElectropaK Define Different Supply Boundaries

The Electro unit is the engine-focused configuration for a customer integrating its own cooling and installation systems. The ElectropaK includes the radiator and air cleaner as part of a more complete engine package.

A written inclusion list should accompany the commercial offer. The alternator, base frame, circuit breaker, enclosure, external fuel system and customer-side heat-exchange equipment should not be assumed to be included.

Installation Engineering

A V12 engine package of this size requires foundation, access, cooling, exhaust and service planning before the generator room or enclosure is released.

Application Review

The 4012-46TWG2A may be evaluated for large prime and standby projects where the liquid charge-cooling architecture fits the available plant infrastructure. Typical project categories include data centres, mining operations, hospitals and telecommunications facilities.

Parallel Operation Requires Complete-System Approval

Generator sets using the 4012-46TWG2A may operate in parallel when the complete packages have compatible controllers, alternators, automatic voltage regulators, protection settings, synchronization equipment and governor interfaces.

Parallel capability is not established by the engine model or dual-speed Build List alone. Load sharing, breaker coordination, synchronization sequence and maximum load step must be validated by the generator-set integrator.

Fuel-Consumption Data Must Be Requested Separately

The supplied product information does not include a numerical fuel-consumption table for the confirmed DGKM8530 / DGKM1005 configuration.

Buyers preparing operating-cost calculations should request the applicable rating sheet with specific fuel consumption at defined load points. Fuel use should not be inferred from the related TAG2A or another Perkins 4012 model.

Service Planning

The supplied content states a 500-hour service-interval direction for the 4012 platform. The Perkins Operation and Maintenance Manual applicable to the complete Build List and ESN should define the exact oil, fuel, coolant and charge-cooling circuit tasks.

Exhaust Aftertreatment and Destination Compliance

Exhaust aftertreatment is listed as N/A in the supplied technical specification. This indicates that no exhaust-aftertreatment system is stated in the listed configuration.

It does not confirm compliance with every regional emissions standard. Destination regulations, tender requirements and supporting emissions documentation must be checked before quotation or shipment.

Original Perkins Replacement Parts

The following references are listed as original Perkins components for the DGK/DGKM8530 Build List family. Additional Perkins engine parts can be reviewed by component category, but final confirmation should be based on the complete ESN.

Several components have more than one possible reference. Do not select parts by appearance, dimensions, casting numbers or the general 4012 model name. Confirm the complete DGK/DGKM Build List and ESN before releasing the final part number and quantity.

Procurement and Export Release

Availability should be confirmed when the inquiry is submitted. The stated lead time is typically 3–4 weeks, and quotations are provided within 24 hours after the configuration, quantity and delivery terms have been defined.

Warranty and Technical Claim Review

The stated warranty period is 12 months or the manufacturer-specified operating hours from the commissioning date, whichever occurs first. Final coverage should be confirmed against the engine serial number, operating duty and applicable warranty terms.

Conditions Outside Warranty Coverage

• Incorrect installation or improper commissioning
• Failure to follow the applicable Perkins Operation and Maintenance Manual
• Normal consumption of filters, belts, coolant and lubricants
• Damage caused by contaminated fuel or an incorrect lubricant specification
• Neglect of the jacket-water or charge-cooling circuit
• Unauthorised modifications or repairs during the warranty period
• Transit damage not reported within three working days of delivery

Information Required for Technical Review

• Complete Build List and ESN
• Current operating hours
• Configured rated speed and generator frequency
• Prime or standby application
• Fault description and operating conditions
• Coolant temperatures, available pressure readings and control-panel alarms
• Photographs and relevant commissioning or maintenance records

The stated technical-review period is within two business days after the required evidence has been received. Depending on the assessment, the response may include replacement parts, coordinated repair support or an engine exchange.

After-Sales Support

• Technical inquiries by email or WhatsApp with a stated one-business-day response direction
• Parts identification for DGK/DGKM8530 builds
• Operation and Maintenance Manual and wiring diagrams available on request
• Remote fault diagnosis by email or video call

Transit Damage Procedure

Inspect the shipment before signing the delivery receipt. Photograph visible damage before unpacking, record it on the receipt and notify the supplier within three working days. Do not commission a visibly damaged engine before the transport-damage report has been reviewed.

Perkins 4012-46TWG2A FAQ

What is the main difference between TWG2A and TAG2A?

The TWG2A uses air-to-water charge cooling, while the TAG2A uses air-to-air charge cooling. They have different cooling interfaces and published power ratings.

Does the same Build List support both 50 Hz and 60 Hz?

The principal DGKM8530 / DGKM1005 family is identified as supporting 1500 rpm / 50 Hz and 1800 rpm / 60 Hz. The complete alternator and control package must also match the selected frequency.

Are DGKM8530 and DGKM1005 an original-and-updated pair?

No. They are both valid original Build Lists for the model. DGK8530 and DGK1005 are the corresponding shortened later-batch designations.

Do all TWG2A Build Lists carry 1253/1385 kVA?

No. These ratings are confirmed for DGKM8530 / DGKM1005. The source does not provide output data for several other TWG2A Build Lists.

Does air-to-water charge cooling remove the need for ambient heat rejection?

No. It transfers charge-air heat into a liquid circuit, but the heat must still be rejected through an approved radiator, heat exchanger or site cooling system.

Should I order an Electro unit or ElectropaK?

Select an Electro unit when the project will integrate its own cooling and intake equipment. Select an ElectropaK when the approved package should include the radiator and air cleaner. Confirm the written inclusion list in either case.

Which package dimensions should be used?

No package dimensions are provided in the supplied information. Use the general-arrangement drawing for the exact Build List and cooling package.

What are the stated package weights?

The temperate package has a stated dry weight of 5260 kg, while the tropical package is stated at 5277 kg.

Does the engine use a full engine ECM?

No full engine ECM is stated. Mechanical unit injection is controlled through an actuator and electronic governor.

Is numerical fuel-consumption data available on this page?

No. Request the applicable rating sheet and specific fuel-consumption data for the selected speed and load points.

Does N/A aftertreatment confirm emissions compliance?

No. It indicates that no exhaust-aftertreatment system is stated in the supplied configuration. Destination requirements must still be confirmed.

What information is required for a quotation?

Provide the complete Build List, ESN, rated speed, frequency, duty, cooling package, supply scope, alternator information, site conditions, quantity, destination and required documents.

Request a 4012-46TWG2A Configuration Review

Submit the following through the engine inquiry and quotation page:

• Complete DGK or DGKM Build List
• Complete ESN or a clear nameplate photograph
• Required speed: 1500 rpm or 1800 rpm
• Required frequency: 50 Hz or 60 Hz
• Prime or standby duty requirement
• Temperate or tropical cooling package
• Electro unit or ElectropaK supply scope
• Charge-cooling circuit and heat-rejection arrangement
• Governor, actuator and control-panel information
• Alternator model, output voltage and power factor
• Maximum site temperature and altitude
• Original generator-set manufacturer and model for replacement projects
• Quantity, delivery terms and destination port
• Required emissions, export, test and warranty documentation