Rewinding a Frame 400 Motor — Precision in Every Layer

Just completed the full rewinding of a Frame 400 electric motor, following a structured sequence of burn-off, insulation preparation, rewinding, and final impregnation. Motors of this size — with a shaft height of 400 mm — are typically used in high-load industrial environments, such as pumping stations, marine propulsion, or process systems requiring continuous, high-power duty cycles.

Process Overview

• Burn-off phase: All existing insulation and external paint was removed in our controlled burn-off oven, leaving surfaces impeccably clean and fully prepared for reassembly
• Rewinding: New coils were formed and inserted with precision, respecting slot geometry and thermal design constraints
• VPI treatment: A full Vacuum Pressure Impregnation cycle ensured complete resin penetration for maximum insulation life and thermal protection
• Final stage: Taping, slot wedges, varnish, and mechanical reassembly under standard IEC tolerances

From the Inside Out

The detail visible in the stator image reflects what we value in every repair:

• Material integrity
• Thermal resilience
• Mechanical alignment
• Long-term reliability

In high-power motors, rewinding isn’t just repair — it’s recovery of value, performance, and uptime.

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Valiadis × CERB: Exclusive Partnership for Transformers, Generators & High‑Voltage Services

Meet us at HYDRO 2025
Thessaloniki • 22–24 October 2025 • HELEXPO • CERB Booth 131

Overview

Valiadis Hellenic Motors is pleased to announce its exclusive partnership with CERB (Central Energy Repair Base) — a European leader in testing, repair, overhaul, and manufacturing for transformers, hydro‑/turbo‑generators, rotating electrical machines, and high‑voltage equipment. Together we provide an end‑to‑end offering, from electric‑motor manufacturing (Valiadis) to accredited high‑voltage diagnostics, rewinding, balancing, field services, and transformer/generator refurbishment (CERB).

Why this partnership matters

• One accountable team: Motors, transformers, generators, drives, and site services under a single coordination.

• Depth & scale: Heavy‑industry workshops, accredited labs, and mobile teams for rapid deployment.

• Quality you can verify: EN ISO/IEC 17025 high‑voltage testing; proven procedures for diagnostics and acceptance.

Joint capabilities (highlights)

• High‑Voltage Testing (EN ISO/IEC 17025): type/routine tests, partial discharge, insulation diagnostics.

• Transformers: repair/refurbishment & manufacturing; dielectric oil processing; OLTC service & upgrades.

• Generators (hydro/turbo): rewinds, rotor/stator/core repairs, uprates, commissioning/on‑site start‑up.

• Rotating machines (LV/MV/HV): rewinds, dynamic balancing & alignment, vibration analysis, condition monitoring.

• Field & outage services: inspection, troubleshooting, emergency repair, retrofits and upgrades.

• Precision machining & materials QA: shafts/housings, tight‑tolerance fits; metals testing & failure analysis.

• Heavy logistics: engineered transport for large electrical equipment.

CERB at a glance (business units)

CERB comprises 12 specialized units, including a High Voltage Test Laboratory (EN ISO/IEC 17025), Transformer Repair & Manufacturing, Rotating Machines Repair, Vibro Diagnostics & Balancing, Mechanical Processing, Heavy Transport, a Metals Control Laboratory, OLTC Repair, Electro‑construction (LV/MV networks & switchgear), Building & Reconstruction, Pumps & Spare Parts manufacturing, and a Trade division for LV/MV/HV equipment.

Meet us at HYDRO 2025 (Thessaloniki)

Event: HYDRO 2025 – International conference & technical exhibition
Dates: 22–24 October 2025
Venue: HELEXPO Exhibition Centre, Thessaloniki, Greece
Visit: CERB Booth 131
Valiadis contact on site: Dimitris Komeni, Business Development Manager

Let’s talk about: new hydropower schemes, pumped‑storage projects, uprates and refurbishments, condition monitoring, and dependable lifecycle support for rotating machines, generators, and transformers.

Sample engagements

• Generator rewinds & uprates for hydro units, with onsite commissioning support.

• Transformer refurbishment with dielectric oil processing and acceptance testing.

• MV/HV motor overhauls with dynamic balancing and alignment.

• Full‑scope outage services: inspection → diagnostics → repair → return‑to‑service.

• Long‑term condition monitoring and reliability programs.

Call to action

To schedule a meeting at HYDRO 2025 (Booth 131) or request a capability briefing, contact our team. We’ll map your fleet, propose a service plan, and outline options for upgrades and lifecycle cost reduction.

See you at Europort 2025 — Hall 2, Stand 2205

Rotterdam Ahoy • 4–7 November 2025

Valiadis Hellenic Motors SA is exhibiting at Europort 2025 in Rotterdam — one of the world’s leading maritime exhibitions for advanced technology and complex shipbuilding. Join us at Hall 2 – Stand 2205 to explore our latest marine-grade electric motors and energy-efficient propulsion solutions built for demanding environments.

Why Europort matters:
Europort gathers the global maritime ecosystem for four days of innovation, networking, and knowledge exchange. In its last edition, the show will welcome over a thousand exhibitors and tens of thousands of professionals from around 100 countries — a true hub for decision-makers across shipping, offshore, and shipbuilding.

On our stand you’ll find

• IE4/IE5 high-efficiency electric motors engineered for demanding marine and industrial environments

• Custom-built solutions with tailored shafts, mountings, and protective coatings for extended service life

• VFD-ready configurations and ATEX/IECEx-certified options for safe and precise operation

• Comprehensive engineering and overhaul support for shipyards, dredging, and offshore applications

Why meet Valiadis:

• Reliability in harsh, salt-laden environments

• Custom engineering and responsive lead times

• Lifecycle value through efficiency & serviceability

• Made in Greece. Supported worldwide.

Event details:

• Venue: Rotterdam Ahoy (Rotterdam, NL)

• Dates: 4–7 November 2025

• Stand: Hall 2 – Stand 2205

• Social highlights: Europort Cruise Party – Wed 5 Nov • Late opening – Thu 6 Nov (till 21:00)

Let’s meet in Rotterdam.

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A Day in Motion — Dispatch from Athens Facility

At our Athens facility, motion is part of the daily rhythm. Forklifts navigate the yard, lifting, aligning, and loading. Heavy-duty electric motors — carefully packaged, documented, and assigned — move from the production area to outgoing trucks.

Each dispatch is more than a shipment. It’s the closing step of a process that begins with precision manufacturing and ends with reliable installation at its final destination. Behind every unit, there’s a project advancing, a team preparing, a system in motion.

Operations unfold steadily. Hands work in sync. The yard hums with purposeful tempo.

One of those days. A day when coordination, clarity, and momentum come together.

From production to packaging, from Athens to destinations across the region, everything flows forward.

Status in motion.

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Sindos: At the Heart of What We Do

Located in the Sindos Industrial Area of Thessaloniki, our main warehouse hosts the largest stock of electric motors in the Balkan region. With thousands of units across multiple power ranges and configurations, we are equipped to meet urgent demands with speed and accuracy.

Beyond warehousing, the site functions as a complete technical center: maintenance, diagnostics, and performance testing are all conducted in-house. This ensures that every product dispatched from Sindos meets our operational and quality standards.

Strategically positioned and fully integrated with our logistics and ERP systems, the Sindos facility is a key link in our ability to provide reliable, timely solutions to industrial clients across Southeastern Europe.