Elitech Power

3.3kV · 6.3kV · 6.6kV · 10.5kV · 11kV · 13.8kV Output

High Voltage Diesel Generators
HV Output 3.3kV–13.8kV Direct

Elitech Power supplies high voltage (HV) diesel generator sets with direct medium-voltage output — eliminating the need for a step-up transformer. Available 500kVA to 3,000kVA with output voltages of 3.3kV, 6.3kV, 6.6kV, 10.5kV, 11kV or 13.8kV at 50Hz or 60Hz. HV alternators from Stamford HVSI series and Leroy-Somer LSA 52 HV. Engines: Cummins QSK, Perkins 4012, MTU Series 2000, Baudouin 12M26. CE and IEC 60034 certified. Factory direct with 24-hour quote response.

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View 1000kVA+ Generators

500–3000

kVA Range

3.3–13.8kV

HV Output Options

Step-Up Transformer

40ft

Container Option

What Is a High Voltage Generator Set?

Technical explanation and key advantages over standard LV generators with transformers.

A high voltage (HV) generator set produces electricity at medium voltage — typically 3.3kV, 6.3kV, 6.6kV, 10.5kV, 11kV or 13.8kV — directly from the alternator, without the need for a separate step-up transformer. Standard (LV) generators output at 400V / 480V, which must be stepped up to medium voltage if the facility distribution system or grid connection point operates at HV. By integrating the HV alternator into the generator set, the complete step-up transformer, transformer room and associated LV cabling are eliminated — reducing capital cost, space requirements and electrical losses.

HV Generator Technical Specifications

Power Range	500 kVA to 3,000 kVA (larger on request)
HV Output Voltages (50Hz)	3.3 kV / 6.3 kV / 6.6 kV / 10.5 kV / 11 kV
HV Output Voltages (60Hz)	3.3 kV / 4.16 kV / 6.6 kV / 7.2 kV / 13.8 kV
Frequency	50Hz or 60Hz
Power Factor	0.8 lagging standard; 0.85 or unity option
Engine Options	Cummins QSK19 / QSK23 / QSK38 / QSK60 — Perkins 4012 / 4016 — MTU 16V / 20V Series 2000 — Baudouin 12M26 / 16M33
HV Alternator Options	Stamford HVSI (medium voltage series) — Leroy-Somer LSA 52 HV — Siemens (on request)
HV Switchgear	Indoor VCB (vacuum circuit breaker) cubicle, included standard
Protection Relays	SEL / Schneider / ABB numerical protection relays — overcurrent, earth fault, differential
Grounding	Neutral earthing resistor (NER) cabinet included standard for 6kV+ systems
Enclosure	Open frame / silent canopy / 40ft ISO container (standard for HV units)
Paralleling	HV bus synchronising available — 2×1000kVA or 2×1500kVA configurations standard
Standards	ISO 8528, IEC 60034, IEC 60076 (transformer), IEC 62271 (switchgear), CE
Documentation	Single-line diagram, protection relay settings, commissioning manual, test reports

LV Generator + Transformer vs Direct HV Generator

Understanding when a direct HV generator set is the better solution.

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Standard Approach

LV Generator (400V) + Step-Up Transformer

✅ Lower generator unit cost

✅ Standard 400V alternator — widely available

✅ Easier maintenance access

❌ Requires separate transformer (significant cost and space)

❌ Transformer losses 1–2% of output

❌ Larger footprint — transformer room required

❌ Additional point of failure

Best for: <500kVA, short cable runs, budget-constrained projects

Direct HV Solution

Direct HV Generator (3.3kV–13.8kV)

✅ No step-up transformer — eliminates capital cost

✅ Lower electrical losses — typically 1–2% efficiency gain

✅ Compact footprint — no transformer room

✅ Fewer components — higher overall system reliability

✅ Long distribution cable runs without LV cable losses

❌ Higher generator unit cost

❌ HV maintenance requires qualified HV personnel

Best for: 500kVA+, long cable runs, grid-connected projects, mining power plants

HV Output Voltage Selection Guide

Match HV output to your facility distribution voltage or utility grid connection point.

HV Output	Hz	Typical Application	Common Markets
3.3 kV	50 / 60Hz	Industrial plant distribution, mining	UK, Australia, Southeast Asia
6.3 kV	50Hz	Chinese standard industrial HV	China, Africa (Chinese projects)
6.6 kV	50 / 60Hz	Industrial distribution, oil & gas	UK, Middle East, Australia
10.5 kV	50Hz	Chinese grid interface standard	China, Chinese-funded projects globally
11 kV	50Hz	Utility grid connection, substations	UK, Africa, South Asia, Australia
13.8 kV	60Hz	North American / Caribbean utility standard	USA, Canada, Caribbean, Latin America

Typical HV Generator Applications

Mining Power Plants

Containerized 6.6kV or 11kV prime power for remote open-pit and underground mining operations — direct feed to mine distribution switchboard.

Data Centre Backup

HV standby generator sets for large Tier III–IV data centres with 11kV or 13.8kV distribution systems — eliminates UPS room transformer.

Grid Parallel & Substations

11kV or 13.8kV generator sets synchronising directly to utility grid — no inter-connecting transformer required at the grid interface.

Oil & Gas Facilities

6.6kV or 11kV prime power for offshore platforms, refineries and petrochemical plants with HV electrical distribution systems.

Heavy Industry

6.3kV or 10.5kV standby power for steel mills, cement plants and large manufacturing facilities with HV motor drives and equipment.

Rural Electrification

11kV prime power plants for rural electrification projects — HV output feeds directly into overhead line distribution without local transformer.

HV Generator FAQ

What voltage levels are available for HV diesel generators?

Elitech Power can supply HV generator sets with the following direct output voltages: 3.3kV, 6.3kV, 6.6kV, 10.5kV and 11kV at 50Hz; and 3.3kV, 4.16kV, 6.6kV, 7.2kV and 13.8kV at 60Hz. Other voltages (such as 4.16kV or 12.47kV) are available on request. Specify your required voltage, frequency and earth system (solidly earthed, resistance earthed or isolated) when enquiring.

What protection equipment is included with an HV generator?

Standard HV generator package includes: HV VCB (vacuum circuit breaker) output cubicle, numerical protection relay (overcurrent ANSI 51, earth fault ANSI 51N, reverse power ANSI 32), neutral earthing resistor (NER) cabinet, metering CT/PT cabinet, and surge arrestors. An optional differential protection relay (ANSI 87G) is available for large units or critical applications. Full single-line diagram and protection relay settings schedule are provided with every HV generator.

Can HV generators be paralleled with the utility grid?

Yes. Elitech Power can supply HV generator sets configured for grid-parallel operation, including automatic synchronising controls, grid protection relays (ANSI 27/59 under/overvoltage, ANSI 81 under/overfrequency, ANSI 25 synchronising check) and power export metering. Grid-parallel systems require close coordination with the local utility — we provide full documentation for utility connection applications.

What is the minimum order for an HV generator set?

Minimum order is 1 unit. Due to the custom HV alternator winding and switchgear, production lead times are typically 25–40 working days. For power plant projects with 2 or more units, we offer package pricing with shared engineering and commissioning support.