NMX‑FQC‑30 / Rev 00 / power conversion / rotary · static · shore 2026 · Product Page

NMX-FQC-30 · ENGINEERED TO ORDER — FREQUENCY CONVERTERS & SHORE POWER SUPPLY SYSTEMS

Two grids. One bridge.

Name: Frequency Converter & Shore Power Supply System
Brand: Neometrix

Power is a dialect problem. A warship is a 60 Hz world berthed against a 50 Hz country; a flight line speaks 400 Hz; an imported machine wants the grid it left behind. The converter is the bridge: rotary sets — motor and alternator on one bedplate, isolated by construction, surge-proof by inertia — and static converters — compact, precise, built fixed or trolley-mounted for berths, shops and flight lines. Shore supply completes the path: berth connection stations and motorised cable reels and davits from our deck-machinery house, carrying the power across the brow. And the bridge is also a filter — isolation, regulation, clean waveforms, managed harmonics: the converter defends the load, not just re-times it. Quoted across rotary and static requirements; the delivered 400 Hz ground-power line is the heritage. Engineered to order — no delivered converter of this class is claimed.

Enquire — converters & shore power Capability sheet (PDF)

Illustrative image, not a delivered system — a rotary frequency-converter set in a machine hall: two coupled grey electrical machines mounted on a common steel bedplate with a guarded coupling between them, cable trays overhead, a grey control cubicle with blank round meters beside the set, clean painted floor, no people and no text

Fig · 01 The rotary set — one machine listening to the grid, the other speaking the load’s language, coupled on a single bedplate — illustrative, not a delivered system

Ratings

10 – 500 kVA classrotary · static

Converts

50 · 60 · 400 Hzsingle & three phase

Forms

fixed · trolley · berthstations · cable systems

Quality

isolated + regulatedclean waveform · filtered

Built

to orderinstall · commission · AMC

ISO 9001 / 14001 Engineered to order Marine + industrial power Power-conversion house Noida · India

Overview

Every load speaks the grid it was built for.

The world never agreed on electricity. Half of it runs at 50 Hz, half at 60; aviation settled on 400 Hz because lighter machines could spin faster; and every laboratory that imports an instrument imports its grid assumptions with it. Mostly the disagreement stays invisible — until a 60 Hz warship comes alongside a 50 Hz berth and must shut her generators down, or a test shop must run a machine built for another continent, or a flight line must feed aircraft whose electrics were never meant to see the national grid. Then somebody must build the bridge — and build it well, because the loads on the far side are precisely the expensive, sensitive ones.

Illustrative image, not a delivered system — a trolley-mounted static frequency converter: a grey wheeled cabinet about chest height with a tow handle, louvred side panels, one blank dark display and a row of unlabelled indicator lamps on its face, a heavy output cable coiled on an integral reel at the rear, workshop floor, no people and no text

Fig · 02 The static converter — the bridge on wheels, rolled to wherever the outfitting berth or the test shop needs it — illustrative, not a delivered system

The rotary set is the incumbent for good reasons. Couple a 50 Hz motor to a 60 or 400 Hz alternator on one bedplate and the conversion happens mechanically, through the shaft — which buys virtues electronics cannot copy: galvanic isolation by construction (the two grids never touch), a genuinely sinusoidal output no matter how ugly the load’s current is, inrush and surge tolerance carried by rotating inertia, ride-through of disturbances, and decades of rugged service. The price is mass, foundations, cooling and acoustics — all engineering, all ours: the set is delivered with its installation, not just in a crate.

The static converter is the precision instrument. Rectifier, DC link, inverter: grid in, exact frequency out, with tight regulation, high efficiency, low noise and a footprint the rotary cannot match — including the form the shipyards keep asking for: trolley-mounted units that roll along an outfitting berth or a flight line and plug a ship or an aircraft into the right grid wherever it stands. Harmonic filters keep the shore side clean; paralleling scales the capacity; and modern control makes 50-to-60 and 50-to-400 equally at home.

Shore supply is the whole path, not just the box. At a naval berth the conversion is only the middle of the journey: the berth connection station carries the breakers, protection, metering and interlocked connectors that make the handover lawful and safe; and the motorised cable handling and stowage systems — reels, davits, festoons, straight from our deck-machinery house — carry the heavy cables across the brow under control and recover them the same way. The shipbuilders’ own tenders ask for exactly this gear, and the delivered 400 Hz aircraft ground-power line is this discipline’s heritage under the same roof.

A converter that merely changes frequency has done half its job. The bridge is also a filter: isolation, regulation, a clean waveform and managed harmonics — the load on the far side should never know the crossing happened.

The Dialect Problem

Grids disagree; loads don’t adapt

60 Hz fleets, 400 Hz flight lines, imported machines — equipment speaks the grid it was built for, and the converter is the only honest translator.

Rotary Or Static

Each has its day

Rotary where isolation, surge tolerance and decades of service rule; static where precision, footprint and mobility rule — chosen by duty, not by fashion.

More Than Frequency

The bridge defends the load

Isolation, regulation, waveform quality, managed harmonics — conversion done properly protects the expensive, sensitive loads it feeds.

Architecture

Convert, connect, defend.

The schematic follows the power — from the grid, through conversion and defence, to the load — and shows the machine that carries it: the rotary sets, the static converters, the shore stations and cable systems, and the protection and controls that make it lawful.

FIG · 03FQC ARCHITECTURE · ROTARY SETS / STATIC SFC / SHORE STATIONS + CABLE · PROTECTION & CONTROLS

Fig · 03 From the 50 Hz country to the 60 Hz ship and the 400 Hz aircraft — converted, connected, and defended on the way

Arc · 01

Rotary M-G Sets

Motor and alternator on one bedplate, 10–500 kVA class — isolated by construction, surge-proof by inertia, engineered with foundations, cooling and acoustics.

Arc · 02

Static Converters

Rectifier — DC link — inverter: precise, efficient, filtered — fixed installations or trolley-mounted units for berths, shops and flight lines.

Arc · 03

Shore Stations & Cable

Berth connection stations — breakers, metering, interlocked connectors — and motorised reels, davits and festoons carrying the cables across the brow.

Arc · 04

Protection & Controls

Protection coordination, synchronising and changeover logic, monitoring and records — tested, commissioned and proven at the berth or the shop.

Have a frequency-converter, shore-supply or ground-power requirement? Send the loads, the grids and the site — a clause-by-clause compliance matrix within two working days · [email protected]

Send tender spec

Specifications

Reference system, built to the load.

The parameters below describe a reference installation. The technology choice, rating, form and outfit all follow from three givens: the loads, the grids on both sides, and the place the bridge must stand.

Illustrative image, not a delivered system — a quayside shore power supply station: a grey weatherproof connection cabinet on a concrete quay edge, a motorised cable reel on a small davit frame beside it paying heavy black cables toward the plain unmarked grey side of a ship at the berth, bollards and harbour water beyond, overcast light, no people and no text

Fig · 04 The shore station — the last metres of the journey: protected, metered, interlocked, and carried across the brow under control — illustrative, not a delivered system

Where converter installations go wrong

In the system, not the box. A converter sized to the nameplate stalls on the real load’s inrush — motors starting, transformers magnetising; a static unit without proper filters exports its harmonics to everyone sharing the feeder; a rotary set dropped onto a poor foundation spends its life vibrating its own bearings loose; shore cables handled by hand across a tidal brow are a daily injury waiting; and an installation without protection coordination turns the first fault into a blackout on both sides of the bridge.

So the sizing starts from the load’s behaviour, not its nameplate — inrush, duty cycle, growth; filters and impedances are engineered so the shore side stays clean; rotary foundations, cooling and acoustics are part of the delivery; the cable path is mechanised — reels, davits, festoons, interlocked connectors — because the brow moves with the tide; and protection is coordinated end to end, then proven in commissioning: fault cases staged, changeovers timed, records signed. The bridge is delivered as an installation, not an appliance.

Full specification — expand

System	Frequency converter & shore power supply system — rotary M-G sets, static converters, berth stations & motorised cable systems; engineered, built, installed, commissioned & supported
Function	Bridges grids that disagree — 50 / 60 / 400 Hz — and defends the load: isolation, regulation, clean waveform, managed harmonics
Rotary Sets	Motor-generator pairs on one bedplate, 10–500 kVA class — galvanic isolation by construction, sinusoidal output, inrush / surge tolerance, ride-through; foundations, cooling & acoustics engineered
Static Converters	Rectifier – DC link – inverter; fixed or trolley-mounted; precise regulation, harmonic filtering, paralleling; the mobile form the outfitting berths & flight lines ask for
Conversions	50 ↔ 60 Hz (marine & imported equipment) · 50 → 400 Hz (aviation) · single & three phase · voltages to the load’s standard
Shore Stations	Berth connection stations — breakers, protection, metering, interlocked connectors — weatherproof, tidal-berth-ready
Cable Systems	Motorised cable handling & stowage — reels, davits, festoons from the deck-machinery house — heavy cables across the brow under control, stowed the same way
Power Quality	Galvanic isolation (rotary), tight regulation, clean waveforms, filtered harmonics, ride-through — the shore side stays clean, the load side stays safe
Sizing Doctrine	From the load’s behaviour, not its nameplate — inrush, duty cycle, growth; protection coordinated end to end and proven in commissioning
Heritage	The delivered 400 Hz aircraft ground-power line — the same discipline, decades on the flight line; this page’s class = marine & industrial conversion + shore supply
Service	Installation, testing, commissioning, protection coordination, AMC — and refit of converter installations already serving
Sourcing	Electrical machines, power semiconductors & protection relays are bought-in certified items; Neometrix engineers the sets, converters, stations, cable systems, controls & installation
Status	Engineered to order · quoted across rotary & static frequency-converter requirements · grounded in the delivered ground-power, electrical-integration & deck-machinery franchises · no delivered converter of this class is claimed on this page

PDF · 1 page

Frequency Converters & Shore Power — Capability Sheet

Tender Response

Send loads, grids & site — compliance matrix in two working days

Variants

One discipline, the bridge the site needs.

Requirements call it a rotary converter, a static frequency converter, a shore supply system, or a ground-power point. The discipline — the right grid, delivered clean, defended — is common; the machine follows the load and the place.

Var · 01

Rotary Converter Sets

10–500 kVA class M-G sets with their foundations, cooling and acoustics — the isolated, surge-proof choice for berths, bases and hard-duty shops.

Var · 02

Static Frequency Converters

Fixed and trolley-mounted SFC units — precise, filtered, parallelable — the mobile bridge the outfitting berths, test shops and flight lines keep tendering.

Var · 03

Shore-Supply Stations & Cable Systems

Berth connection stations and motorised reels, davits & festoons — the whole path from substation to ship, mechanised and interlocked.

Var · 04

400 Hz & Test-Shop Supplies

Aviation 400 Hz points on the delivered ground-power heritage, and 60 Hz test supplies for laboratories and imported-equipment installations.

Applications

Where the grids meet.

Wherever a load must run far from the grid it was built for.

A · 01Naval berths & dockyard shore supply

A · 02Shipyard outfitting & trials power

A · 03OEM & test-shop 60 Hz supplies

A · 04Aviation 400 Hz points & MRO lines

A · 05Imported-equipment installations

A · 06Refit, protection upgrades & AMC

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 Why do frequency converters exist at all?

Because the world electrified twice, and the two halves never reconciled. One tradition settled on 50 Hz, the other on 60; India runs at 50, while most of the world’s navies — and much of the equipment built for global markets — run at 60. Aviation went further: aircraft electrics standardised on 115 V at 400 Hz, because at higher frequency the same power needs far lighter machines and transformers — weight being aviation’s only religion. Frequency is not a detail a load can shrug off: motors spin at grid-proportional speeds, transformers and magnetics are sized to their design frequency, and control electronics time themselves by it. Run 60 Hz equipment on 50 and motors slow by a sixth while magnetics run hotter; some equipment merely suffers, some fails, some refuses outright. So wherever a load must live far from its native grid — a 60 Hz warship alongside a 50 Hz berth, an imported machine in an Indian factory, an aircraft on any flight line on earth — a converter must stand in between, taking the country’s power and re-speaking it in the load’s dialect. That machine, in its rotary and static forms, with the shore path that delivers it, is this page.

Q · 02 Rotary or static — how is the choice actually made?

By the duty, honestly weighed — each technology has virtues the other cannot copy. The rotary set converts through physics: a 50 Hz motor spins a 60 or 400 Hz alternator on a common shaft, and because the only connection between the grids is mechanical, you get galvanic isolation by construction — faults, transients and noise on one side simply have no wire to cross on. The alternator’s output is genuinely sinusoidal no matter how distorted the load’s current is; the spinning mass shrugs off motor-starting inrush that would trip an electronic unit or force it to be oversized; and the machines run for decades with bearings and brushes as their only appetites. Its costs: mass, foundations, cooling, sound. The static converter converts through electronics — rectifier, DC link, inverter — and its virtues are the mirror image: compact, efficient, precisely regulated, quick to install, and above all mobile: the trolley-mounted forms the shipyards and flight lines keep tendering simply cannot be built as rotary machines. Its costs: harmonics to be filtered, inrush margins to be engineered, semiconductors to be protected. Our position is deliberate neutrality — we engineer both, and let the load, the site and the duty pick the winner; the specification table above is written to make that choice explicit rather than fashionable.

Q · 03 What does a naval shore-supply installation involve beyond the converter?

The whole journey from substation to switchboard — the converter is only the middle of it. A warship alongside wants to shut down her generators: quieter berth, saved fuel, maintenance access to her own machinery. For that her switchboard must receive power that is right in frequency, right in voltage, protected, metered and safe to connect — across a gap that rises and falls with the tide. So the installation begins at the berth connection station: a weatherproof assembly carrying the breakers, the protection that must be coordinated with both the shore network above and the ship’s system below, the metering the dockyard accounts by, and interlocked connectors that make it physically impossible to part a cable under load. Then comes the part everyone underestimates: the cables themselves — heavy, numerous and awkward — which is why the shipbuilders’ own tenders ask for motorised cable handling and stowage systems: powered reels, small davits and festoon arrangements that pay the cables across the brow under control, tend them as the ship works at her moorings, and recover and stow them without a line of sailors hauling copper by hand. That gear is deck machinery in every respect — drums, drives, brakes, marine detailing — and it comes from the same Neometrix house as our winches and davits. Conversion, connection, protection, mechanised cable handling, commissioning: one installation, delivered as one system.

Q · 04 What does “the bridge is also a filter” mean in practice?

That a converter’s second job is power quality — and it is often the reason the converter was specified at all. The loads on the far side of the bridge are rarely casual: a warship’s switchboard, avionics on external power, laboratory instruments, an imported machine tool’s CNC. What they need is not merely 60 or 400 Hz, but clean power: stable voltage, low distortion, no imported transients. The rotary set delivers this almost as a by-product — galvanic isolation means shore-side faults and noise have no conductive path across, and the alternator writes a fresh sine wave regardless of upstream ugliness; its inertia even rides through brief disturbances. The static converter achieves the same ends deliberately: its DC link decouples the two grids, its inverter regulates output tightly, and its input filters keep its own harmonics from polluting the shore network — a courtesy the feeder’s other users depend on. In both cases the engineering extends beyond the box: earthing philosophy, protection coordination, cable impedances and connector quality all shape what the load actually sees. Done properly, the load on the far side cannot tell the crossing happened — which is the entire point.

Q · 05 Where does the 400 Hz aviation world fit in?

It is the dialect this house has spoken longest. Aircraft electrics run at 115 V, 400 Hz — the frequency at which generators, motors and transformers become light enough to fly — and every aircraft on the ground therefore needs a translator: external power that speaks 400 Hz so the aircraft’s own systems can run without burning engine hours or battery. That translator is ground power, and the delivered Neometrix ground-power line is precisely this discipline — grid or engine-driven power converted to the aviation standard and delivered at the aircraft’s socket, on flight lines, in hangars and at MRO bays. This page extends the same discipline to the marine and industrial dialects: the machine that makes 400 Hz for an aircraft and the machine that makes 60 Hz for a berthed warship differ in windings and ratings, not in philosophy — convert exactly, isolate, regulate, protect, and deliver through connection hardware engineered for the place. For airfield and MRO requirements — fixed 400 Hz points, centralised systems feeding several stands, or mobile units — the converter technology on this page and the delivered heritage behind it arrive together; for the aircraft-side units themselves, the ground-power line stands as its own product family.

Q · 06 What do you build, and what is bought-in?

We build the installation as a system, from franchises we have delivered. What Neometrix does: the rotary sets — machine selection and pairing, bedplates and couplings, foundations, cooling and acoustic engineering, excitation and control; the static converters — power-stage integration, filtering, regulation and paralleling control, and the fixed and trolley-mounted builds with their connectors and cable management; the shore-supply installations — berth connection stations with protection, metering and interlocked connectors, and the motorised cable reels, davits and festoons from our deck-machinery house; the protection coordination, synchronising and changeover logic, controls and records; and the installation, site testing, commissioning and AMC — including refits of converter installations already serving. What is bought-in certified: the electrical machines themselves, power semiconductors and drive stages, protection relays, meters and standard switchgear — integrated, coordinated and proven by us. Engineered to order; quoted across rotary and static frequency-converter requirements; grounded in the delivered ground-power, electrical-integration and deck-machinery franchises; no delivered converter of this class is claimed on this page.

↗

The power & deck lines from Neometrix.

The delivered 400 Hz heritage, the deck-machinery house behind the cable systems, and the power-systems family — engineered at our Noida facility.

↗ 400 Hz Heritage

Ground Power Unit

The delivered aviation line — this discipline’s longest-spoken dialect.

↗ Deck Machinery

Marine & Naval Hydraulic Deck Equipment

The reels, davits and drives behind the shore-supply cable systems.

↗ Power Systems

Fuel Cell Hybrid Power System

The power-electronics kin — generation and conversion under one discipline.

Browse all Neometrix product lines.

Get a quotation

Send the loads
and the grids.

The defence programmes desk replies within two working days with a clause-by-clause compliance matrix and a budgetary quotation. Write to [email protected] or use the form.

Enquire — converters & shore power Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 ENGINEERED TO ORDER — FREQUENCY CONVERTERS & SHORE POWER SUPPLY SYSTEMS ROTARY M-G SETS · STATIC SFC (FIXED + TROLLEY) · BERTH STATIONS & MOTORISED CABLE SYSTEMS · 50 / 60 / 400 HZ ENGINEERED IN NOIDA · INDIA

Two grids. One bridge.

Every load speaks the grid it was built for.

Grids disagree; loads don’t adapt

Each has its day

The bridge defends the load

Convert, connect, defend.

Rotary M-G Sets

Static Converters

Shore Stations & Cable

Protection & Controls

Reference system, built to the load.

Where converter installations go wrong

One discipline, the bridge the site needs.

Rotary Converter Sets

Static Frequency Converters

Shore-Supply Stations & Cable Systems

400 Hz & Test-Shop Supplies

Where the grids meet.

Common questions.

The power & deck lines from Neometrix.

Ground Power Unit

Marine & Naval Hydraulic Deck Equipment

Fuel Cell Hybrid Power System

Send the loads
and the grids.

Similar Products

Share This Page

Two grids. One bridge.

Every load speaks the grid it was built for.

Grids disagree; loads don’t adapt

Each has its day

The bridge defends the load

Convert, connect, defend.

Rotary M-G Sets

Static Converters

Shore Stations & Cable

Protection & Controls

Reference system, built to the load.

Where converter installations go wrong

One discipline, the bridge the site needs.

Rotary Converter Sets

Static Frequency Converters

Shore-Supply Stations & Cable Systems

400 Hz & Test-Shop Supplies

Where the grids meet.

Common questions.

The power & deck lines from Neometrix.

Ground Power Unit

Marine & Naval Hydraulic Deck Equipment

Fuel Cell Hybrid Power System

Send the loadsand the grids.

Similar Products

Share This Page

Send the loads
and the grids.