55kVA Three Phase Alternator STRO-55K

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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 55kVA Three Phase Alternator (STRO-55K) is designed for generator builds, commercial and industrial power applications. Manufactured under a strict ISO 9001 quality assurance system, this 4 pole brushless unit handles starting loads without voltage drops.

  • Power output: It supplies a continuous 50kVA prime power rating and scales up to 55kVA standby capacity for emergency backup at 50Hz.
  • Integrated AVR protection: The built in automatic voltage regulator keeps sensitive electronics safe from sudden sags.
  • Low reactance windings: Uses insulated high purity copper elements to reduce internal resistance, lowering fuel usage and keeping harmonic distortion low.
  • Standard fitment build: Features an IP23 enclosure and Class H thermal insulation to protect the core components in humid or dusty workspaces.

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 55kVA Alternator

The StromerPower STRO-55K is a 55kVA three phase alternator core designed for mid scale commercial and light industrial applications, generator builds or repairs. Assembled under a strict ISO 9001 quality assurance system, this 4 pole brushless synchronous unit operates at a standard 1500rpm. The machine provides engine builders and service technicians with a stable power baseline to keep operations running smoothly when the local grid fails.

StromerPower 55kVA (STRO-55K) Alternator Features

  • Power output: Delivers a reliable 50kVA prime power rating for continuous operation and pushes up to 55kVA standby output for emergency backup at a stable 50Hz frequency.
  • Voltage regulation: The factory installed AVR module locks line voltage within tight limits. It prevents sags and spikes from damaging equipment.
  • Stator layout: Uses high quality insulated copper windings designed to lower internal resistance.
  • Vibration and balance: Built with a dynamically balanced rotor that stops structural vibration.
  • Frame build: Features an IP23 weather enclosure with Class H thermal protection.
  • Wiring access: The terminal box is oversized,  giving technicians plenty of room for quick line connections, testing and routine AVR servicing.
  • Clean sine waves: This unit limits harmonic distortion to provide a smooth wave profile.

PRODUCT SPECIFICATIONS

Weight 243 kg
Dimensions 78 × 58 × 73 cm
Brand

StromerPower

Product Type

Alternator

Phase

Three Phase

Alternator Prime Power

50kVA

Alternator Standby Power

55kVA

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)

#3 / 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