275kVA Three Phase Alternator STRO-275KSD

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Bradley: +27 62 743 5089 | bradley@sdecpower.co.za
Ruan: +27 66 511 2009 | ruan@sdecpower.co.za

We offer industry leading 24 month / 1,000 hour warranties on our engines and diesel generators.

The StromerPower 275kVA Three Phase Alternator (STRO-275KSD) delivers high capacity power for larger generator builds as well as commercial and industrial applications. Assembled under a strict ISO 9001 quality assurance scheme, this 4 pole brushless unit gives engine builders a dependable baseline to manage heavy starting loads without sags across distribution lines.

  • Power output: Supplies a reliable 250kVA prime rating for continuous application and up to 275kVA standby power at a stable 50Hz frequency.
  • Responsive AVR control: An integrated automatic voltage regulator manages line fluctuations to protect electronics and equipment.
  • Low reactance windings: High purity copper minimises impedance losses to maintain clean power while lowering engine fuel consumption.
  • Rugged compact frame: Built on a thick steel mounting base, Class H thermal insulation and an IP23 protective shell to withstand harsh, humid and dusty environments.

We offer delivery across Sub-Saharan Africa at the best prices.

SUPERIOR QUALITY AND PERFORMANCE

StromerPower sets new global standards in all aspects, from design, manufacturing, material selection, production and testing equipment, tooling, and quality control.

GENERAL SPECIFICATIONS

StomerPower 275kVA Alternator

The StromerPower STRO-275KSD functions as a heavy duty 275kVA alternator core engineered for large generators, commercial and industrial applications. Built under a strict ISO 9001 quality assurance system, this 4 pole brushless synchronous component gives builders and engineers a solid option for their primary or standby power need. It operates smoothly at 1500rpm to supply stable electricity for processing facilities, retail centres, heavy manufacturing sites or commercial properties.

StromerPower 275kVA (STRO-275KSD) Alternator Features

  • Power capacity: Handles a continuous 250kVA prime power load and peaks at 275kVA standby output for critical backup operations (50Hz at 0.8 power factor).
  • Automatic voltage control: The factory installed automatic voltage regulator steadies outbound currents and protects equipment.
  • Copper core efficiency: Built with premium insulated copper windings that lower impedance losses means less waste heat and better engine fuel economy.
  • Vibration and alignment: A dynamically balanced rotor limits internal  resonance and protects bearing life.
  • Chassis and insulation: Features a  robust steel frame, an IP23 weather protective shell and Class H thermal insulation.
  • Terminal hub access: The terminal box allows immediate access for quick terminations, phase balancing and routine maintenance.

PRODUCT SPECIFICATIONS

Weight 671 kg
Dimensions 108 × 68 × 82 cm
Brand

StromerPower

Product Type

Alternator

Phase

Three Phase

Alternator Prime Power

250kVA

Alternator Standby Power

275kVA

Rated Frequency

50Hz

Voltage

400V

Voltage Regulation

+/- 1%

Voltage Regulation Change (% UN)

+/- 1%

Phase Change Rate (%)

+/- 1%

Power Factor

0.8

Insulation Class

H

Alternator Type

IM B35

Connection and Pole

4 Pole, Series Star

AVR Model

SX460

Stator

2/3 Pitch

Rotor

Single Bearing

Flywheel Housing (SAE)

#2 / 11.5"

Category:
A partner in power generation

World-Class Manufacturing, Fast Regional Distribution

We source and manufacture high-quality generators, engines, and parts directly from leading global factories, including SDEC. By dealing with us directly, you cut out the middlemen, saving you time and money.

Every engine, alternator, and spare part we supply is built to international standards and fully tested to handle South African conditions. Whether you are a local generator builder looking for loose components or a business needing a complete commercial power setup, we ensure fast delivery, guaranteed stock availability, and dependable performance.

SDEC FACTORY | ROBOTIC ENGINE MANUFACTURING ASSEMBLY LINE

Our Delivery Channels

Sub-Saharan Logistics

We ship SDEC engines, diesel generators, alternators and parts throughout South Africa and across the continent, including Namibia, Botswana, Malawi, Mozambique, Zambia, Zimbabwe, Swaziland, and Lesotho.

Our team handles the entire logistics process, from factory  loading to cross-border transport, ensuring your equipment arrives safely and on time.

We hold a large volume of stock and genuine replacement parts at our warehouses so we can supply clients across Africa quickly and efficiently.

FREQUENTLY ASKED QUESTIONS

Does the price include installation?

No, installation is not included in the price. Any qualified electrician can install the kit and provide a Certificate of Compliance (COC) for the installation as per legislation.

Do you offer installation?

No, we do not offer any installation services, but, any qualified electrician can install our products.

Does the price include delivery?

Delivery is not included in any of the prices. However, delivery will be calculated in your cart at checkout based on your location and product selection.

Tell me about the Warranty

Our product warranty is detailed on each product page and as per our standard terms along with a valid COC. It is a limited warranty.

Price validity

All pricing is valid while stocks last as reflected on your quotation, as specified therein.Â