385kVA Three Phase Alternator STRO-385K

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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 385kVA Three Phase Alternator (STRO-385K) provides reliable power for large generator builds, commercial and industrial applications. Assembled under a strict ISO 9001 quality system, this 4 pole brushless unit gives engine builders the baseline needed to handle severe inductive starting loads without forcing sags across distribution lines.

  • High capacity output: Delivers a reliable 350kVA prime capacity for continuous running and up to 385kVA standby output at 50Hz for emergency grid drops.
  • AS440 AVR control: Outfitted with a premium automatic voltage regulator that handles sudden line drops.
  • Low reactance windings: Employs high purity copper to reduce impedance losses, maintaining a clean power wave while improving fuel efficiency.
  • Rugged industrial frame: Built on a rigid steel base frame with an IP23 weather protective shell 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 385kVA Alternator

The StromerPower STRO-385K is a high capacity three phase alternator built specifically for heavy duty generator assemblies and larger commercial and industrial applications. Produced under a strict ISO 9001 quality assurance system, this 4 pole brushless alternator gives engineers a solid unit that maintains grid integrity during sudden load transfers. It spins at a steady 1500rpm to keep manufacturing facilities and infrastructure running smoothly when grid power fails.

StromerPower 385kVA (STRO-385K) Alternator Features

  • Power capacity: Handles a continuous 350kVA prime power load and peaks at 385kVA standby output for critical backup operations (50Hz at 0.8 power factor).
  • AS440 voltage control: The factory fitted automatic voltage regulator monitors changes to steady outbound currents and protect systems.
  • Conversion efficiency: Features high purity copper windings designed to lower internal resistance, which maximises mechanical to electrical conversion and cuts engine fuel burn.
  • Vibration control: Built with a dynamically balanced rotor that limits operational resonance to preserve bearing life.
  • Chassis and insulation: Utilises an IP23 housing with Class H insulation.
  • Oversized junction box: The terminal box is expanded to give installation technicians clear access for quick input wiring, diagnostics and routine adjustments.

PRODUCT SPECIFICATIONS

Weight 901 kg
Dimensions 125 × 77 × 107 cm
Brand

StromerPower

Product Type

Alternator

Phase

Three Phase

Alternator Prime Power

350kVA

Alternator Standby Power

385kVA

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

AS440

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