550kVA Three Phase Alternator STRO-550K

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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 550kVA Three Phase Alternator (STRO-550K) is built for high capacity generator builds, heavy processing mills and large water pump systems. Assembled under a strict ISO 9001 quality system, this 4 pole brushless machine takes on massive industrial starting loads without forcing sudden sags across your distribution lines.

  • High capacity output: Delivers a reliable 500kVA prime capacity for continuous running and up to 550kVA standby output for emergency grid drops at 50Hz.
  • KR440 AVR control: Outfitted with an advanced automatic voltage regulator that manages sudden line drops to secure electronic systems.
  • Low reactance windings: High purity copper windings reduce impedance losses to maintain a clean sine wave while improving fuel efficiency.
  • Rugged industrial frame: Built on a thick structural steel base with an IP23 enclosure and Class H insulation to withstand high heat 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 550kVA Alternator

If you are building or replacing your standby or primary power, or working on a heavy industrial processing mill, the StromerPower STRO-550K is built for to handle demanding power applications. It is a 550kVA three phase alternator put together under a strict ISO 9001 quality assurance system. Running at a steady 1500rpm, this 4-pole brushless synchronous machine gives you the foundation you need to back up massive commercial grids and equipment networks easily.

StromerPower 550kVA (STRO-550K) Alternator Features

  • Power capacity: It handles a continuous 500kVA prime power load and peaks at 550kVA standby for emergency backup scenarios (50Hz, 0.8 power factor).
  • KR440 voltage regulation: The factory equipped automatic voltage regulator tracks line changes instantly. This protects sensitive electronic equipment from sudden drops.
  • Stator and efficiency: Uses premium insulated copper windings that lower internal impedance, which translates to better efficiency and fuel economy for your primary diesel engine during long runs.
  • Vibration and coupling: Machined to incredibly tight manufacturing tolerances to limit internal vibration.
  • Chassis and insulation: Built with a heavy gauge structural steel base that won't warp during high torque operations, in an IP23 weather enclosure with Class H thermal insulation to resist dust and high heat.
  • Terminal hub access: The terminal box is wide and easily accessible, giving your electrical service teams plenty of room for quick line terminations, phase balancing  and routine AVR tuning.

PRODUCT SPECIFICATIONS

Weight 1176 kg
Dimensions 126 × 84 × 113.5 cm
Brand

StromerPower

Product Type

Alternator

Phase

Three Phase

Alternator Prime Power

500kVA

Alternator Standby Power

550kVA

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, Star

AVR Model

KR440

Stator

2/3 Pitch

Rotor

Single Bearing

Flywheel Housing (SAE)

#1 / 14"

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