Transformers
Distribution ◇ Power ◇ Dry Type ◇ Solar Step-Up ◇ Auto ◇ Isolation ◇ Earthing ◇ Instrument CT / VT ◇ Accessories & Tools
Niccau Industries Limited designs, manufactures, tests, and supplies the complete range of transformers for India's power sector and global markets — from 1 kVA single-phase distribution transformers to 500 MVA EHV power transformers; from compact solar step-up 30/0.69 kV units to precision instrument transformers; from safe-area isolation transformers to hazardous-area explosion-proof units. Every transformer is IS 2026 / IEC 60076 designed, BIS certified, and backed by BARREL Group's 5,000 MW project anchor.
Every Voltage. Every Rating. Every Application. One Transformer Manufacturer.
Niccau Industries' Transformer Division is a comprehensive transformer manufacturer — covering the entire spectrum from small single-phase distribution transformers for rural electrification to large EHV auto-transformers and power transformers for interstate transmission. As the in-house transformer supplier for BARREL Group's 5,000 MW project pipeline, every Niccau transformer is project-proven in real Indian field conditions before it reaches the market.
Our transformer designs use the highest-grade grain-oriented silicon steel (CRGO) for cores, high-purity electrolytic copper for windings, ONAN/ONAF/OFAF cooling systems, advanced insulation systems (Kraft paper, pressboard, transformer oil, dry resin), OLTC or NLTC tap changers, and comprehensive protection systems — Buchholz relay, PRD, WTI, OTI, and magnetic oil gauge.
Standards: IS 2026 | IEC 60076 | BIS | BEE Star Rating | IS 11171 (dry type) | IEC 60726 | PGCIL Specification | IS 3043 (earthing) | IS 16227 (instrument transformers)
An Associate of
BARREL / StenJaan Global Group
Export through DomEx TradLinkDistribution Transformers
25 kVA – 5000 kVA | 11kV / 33kV | Pole / plinth
Power Transformers
1 MVA – 500 MVA | 33kV – 765kV
Dry Type Transformers
Cast resin | VPI | Indoor / data centre
Solar Step-Up Transformers
30/0.69kV | Solar project specific
Special Transformers
Auto | Isolation | Earthing | Furnace
Instrument Transformers
CT | VT | CVT | Combined metering
Accessories & Fittings
Buchholz | PRD | WTI | OTI | OLTC
Transformer Testing Tools
TTR | WR tester | DGA | IR | Hipot
Oil-cooled ONAN distribution transformers for rural and urban electrification, DISCOM feeder supply, industrial HT-LT, and solar project LT distribution. 11kV/0.415kV and 33kV/0.415kV — pole-mounted, plinth-mounted, and pad-mounted. BEE 5-Star energy efficiency rating. IS 2026 / IEC 60076. RDSO / DISCOM approved.
Single Phase Pole-Mounted Distribution Transformer
Lightweight single-phase oil-cooled DT for rural single-phase feeder supply, street lighting, and irrigation pump supply
Technical Specifications
Three Phase Oil-Cooled Distribution Transformer
Standard three-phase ONAN DT for DISCOM distribution, industrial HT supply, and solar/wind project LT output
Technical Specifications
33kV Distribution Transformer — OLTC Option
33kV primary distribution transformer with OLTC for grid voltage stabilisation — industrial zones and large DISCOM feeders
Technical Specifications
Generator step-up transformers (GSU), grid inter-connecting transformers, autotransformers, HVDC converter transformers, phase-shifting transformers, and large EHV power transformers from 1 MVA (33kV) to 500 MVA (765kV). PGCIL / SECI / NTPC specification. IS 2026 / IEC 60076 with full factory acceptance tests including induced voltage, applied voltage, impulse, and load-loss tests.
Power Transformer — 33kV to 132kV
Substation power transformers for grid augmentation, industrial HV feeders, and solar/wind evacuation substations
Technical Specifications
EHV Power Transformer — 220kV to 765kV
PGCIL-specification EHV power transformers for interstate transmission grid — 220kV, 400kV, and 765kV class
Technical Specifications
Generator Step-Up Transformer (GSU)
Generator step-up transformers for thermal, hydro, solar, and wind power plants — LV generator to HV grid
Technical Specifications
Fire-safe, maintenance-free dry type transformers for indoor applications — data centres, hospitals, shopping malls, high-rise buildings, metro stations, railway stations, airports, and hazardous areas. Cast resin (epoxy encapsulated) and VPI (vacuum pressure impregnated) designs. F1 class IP31/54 enclosure. IS 11171 / IEC 60726. 11kV / 33kV — 50 kVA to 10 MVA.
Cast Resin Dry Type Transformer (CRT)
Epoxy cast resin encapsulated — fire-safe, moisture-proof, zero-maintenance for critical indoor environments
Technical Specifications
VPI Dry Type Transformer — Vacuum Pressure Impregnated
Vacuum pressure impregnated with solventless varnish — lower cost than cast resin, suitable for clean indoor environments
Technical Specifications
Explosion-Proof & Hazardous Area Transformer
ATEX / IECEx zone 1 / zone 2 certified dry type transformers for oil & gas, chemical, and mining hazardous areas
Technical Specifications
Dedicated transformers for solar and wind power projects — solar inverter step-up (0.69kV/33kV), wind turbine nacelle transformers, solar switchyard power transformers, and complete substation package transformers. Designed to SECI / NTPC / IREDA specification. OLTC or NLTC, ONAN/ONAF, BEE 5-Star, with solar-specific protections and monitoring.
Solar Inverter Step-Up Transformer — 0.69kV / 33kV
Dedicated pad-mount step-up transformer for solar string and central inverter output — 690V AC to 33kV collection system
Technical Specifications
Wind Turbine Nacelle & Pedestal Transformer
Compact dry-type or oil-filled transformers for wind turbine nacelle installation — 690V generator to 33kV grid
Technical Specifications
Solar Plant Main Evacuation Transformer
Main power transformer for solar project grid evacuation — 33kV collection to 132kV / 220kV / 400kV ISTS grid
Technical Specifications
Auto-transformers (star-delta, series-connected), isolation transformers (galvanic separation), neutral grounding / earthing transformers (NGT/NET), furnace transformers, rectifier transformers, traction transformers, mobile substation transformers, and ultra-isolation transformers for sensitive electronics. All IS 2026 / application-specific standards.
Auto Transformer — Step-Up & Step-Down
Three-phase auto-transformers for grid interconnection, soft starting, and voltage level conversion between adjacent voltage classes
Technical Specifications
Neutral Grounding & Earthing Transformer (NGT / NET)
Creates an artificial neutral for ungrounded delta or impedance-grounded systems — limits earth fault current
Technical Specifications
Isolation & Ultra-Isolation Transformer
Galvanic isolation, noise barrier, and safety isolation for medical, data centre, instrumentation, and sensitive electronics
Technical Specifications
Furnace Transformers
- Electric arc furnace (EAF) — tap changer
- Induction furnace — high current LV
- Heat treatment furnace — resistance
- 10 MVA – 100 MVA, 33kV / 11kV
- IS 2026 / IEC 60076
Rectifier Transformers
- 6-pulse / 12-pulse rectifier transformer
- For drives, electroplating, HVDC
- High current LV — multi-secondary
- K-rated for harmonic loading
- IS 2026 / IEC 60076
Mobile / Package Substation
- Mobile substation trailer-mounted
- Package substation — transformer + switchgear
- Quick deployment — emergency power
- 11kV / 33kV / 132kV
- IEC 62271-202
Variable / Variac Transformer
- Single-phase variac 0–270V output
- Three-phase variable autotransformer
- Manual / motorised control
- 1A – 100A current rating
- IS 5905 / IEC 61558
Traction Transformers
- Railway traction — 25kV / 1ϕ
- Scott-T / V-V configuration
- RDSO / EN 50329 specification
- Metro / mainline railway supply
Amorphous Core Transformers
- Amorphous metal core — 70% less no-load loss
- 50 kVA – 2500 kVA
- BEE Super-efficient / 6-Star
- DISCOM + solar project ideal
- IS 2026 / IEC 60076
Current transformers (CT), voltage transformers (VT), capacitor voltage transformers (CVT), and combined current + voltage transformers for metering and protection — 11kV to 765kV. Accuracy classes 0.1 / 0.2 / 0.2S / 0.5 / 3P / 5P20 / 10P20. IS 2705 / IS 3156 / IEC 61869 series. PGCIL / SECI / NTPC approved.
Current Transformers (CT)
- Outdoor oil-filled CT — 11kV to 765kV
- Indoor resin CT — 11kV / 33kV
- Accuracy: 0.2 / 0.2S / 0.5 (metering)
- 5P20 / 10P20 (protection class)
- IS 2705 / IEC 61869-2
Voltage Transformers (VT / PT)
- Inductive VT — 11kV to 66kV
- Single / three phase VT
- Accuracy: 0.2 / 0.5 / 3P
- IS 3156 / IEC 61869-3
- Outdoor / indoor variants
Capacitor VT (CVT)
- CVT — 66kV / 132kV / 220kV / 400kV / 765kV
- Accuracy: 0.2 / 3P
- Ferroresonance suppressed
- IS 3156 / IEC 61869-5
- PGCIL EHV specification
Revenue Metering CT/VT
- 0.2S accuracy — revenue metering
- ABT metering class CT + VT sets
- NABL-calibrated test certificates
- IS 2705 Part 1–4
- SERC / CERC approved
Combined CT / VT Units
- Metering kiosk — CT + VT combined
- 11kV / 33kV combined unit
- Compact — space saving
- IEC 61869-3 / IS 3156
Zero Sequence CT (Core Balance)
- Core balance CT — earth fault detection
- Rogowski coil CT — flexible
- Split-core CT — retrofit
- Clamp-on CT — non-intrusive
- IS 2705 / IEC 61869-2
Complete transformer accessories and protection fittings — Buchholz relays, pressure relief devices (PRD), winding temperature indicators (WTI), oil temperature indicators (OTI), magnetic oil level gauges (MOG), conservators, dehydrating breathers, explosion vents, rapid pressure rise relays, transformer oil sampling valves, cooler banks, radiators, OLTC motor drives, marshalling boxes, and all standard and special fittings. IS 3639 / IEC 60214 / IEC 60076-1.
Buchholz Relay
- Single-float (conservator-less)
- Double-float standard Buchholz
- Surge Buchholz — OLTC chamber
- IS 3639 / IEC 60076 compliant
- Wiring: Alarm + Trip contacts
Pressure Relief Device (PRD)
- Rapid pressure rise relay (RPRR)
- Spring-loaded PRD — flange mount
- Fast trip — 2ms response time
- Micro-switch alarm + trip output
- IS 3639 / IEC 60076
WTI / OTI — Temperature Indicators
- Winding Temperature Indicator (WTI)
- Oil Temperature Indicator (OTI)
- Analog dial + 4 alarm contacts
- PT100 / thermocouple option
- IS 3639 compliant
Conservator & MOG
- Sealed conservator tank — rubber bag
- Magnetic oil level gauge (MOG)
- Low/high level alarm contacts
- Dehydrating silica gel breather
- Oil filling valve + drain valve
Radiators & Coolers
- ONAN corrugated radiator panels
- ONAF cooling fans + fan motor
- OFAF oil pump + cooler bank
- Fin-tube / tank-mounted radiators
- Stainless steel / mild steel
OLTC Motor Drive Unit
- Motor drive unit (MDU) for OLTC
- Auto / manual / remote operation
- Position indicator — dial type
- Step counter — number of operations
- IEC 60214 / IS 8468 compliant
Marshalling Box
- Outdoor weatherproof marshalling kiosk
- Wiring: All protections + temperature
- Terminal blocks — DIN rail type
- Glands + cable entries
- IP55 / IP65 GRP / SS enclosure
Bushing & Terminals
- Condenser bushing — HV — oil / SF6
- Oil-impregnated paper (OIP) bushing
- LV porcelain / epoxy resin bushing
- Neutral bushing — earthed
- IEC 60137 / IS 2099
Transformer Oil
- Mineral insulating oil — IS 335
- Biodegradable ester oil — FR3
- Silicone fluid — fire-safe
- Oil purification / regeneration
- Oil sampling valve + syringe kit
Complete suite of transformer field testing and laboratory instruments — turns ratio tester (TTR), winding resistance meter, insulation resistance (IR / megger), tan delta / power factor test set, transformer oil BDV tester, dissolved gas analyser (DGA), partial discharge analyser, impulse test equipment, CT/VT accuracy test set, and all site commissioning tools. NABL calibrated.
Turns Ratio Tester (TTR)
- Automatic TTR — ratio + polarity
- 3-phase simultaneous test
- LD / LLN / HV measurement
- Accuracy: ±0.1% ratio
- IEEE C57.12.90 / IEC 60076
Winding Resistance Meter
- DC winding resistance bridge
- OLTC resistance test (all 33 positions)
- Resolution: 1 µΩ
- Current: 10A – 200A DC
- IEC 60076-1 test method
Insulation Resistance / Megger
- HV insulation resistance tester
- Test voltage: 500V – 15kV DC
- PI / DAR / SV / Guard terminal
- IEC 60270 / IEEE 43 method
- Humidity correction factor
Tan Delta / Power Factor
- Tan delta measurement — dielectric loss
- 2kV – 12kV excitation
- CHL / CHE / CH configuration
- Guard circuit for stray current
- IEC 60076-1 / IEEE C57.12.90
Oil BDV Tester (Oil Tester)
- Transformer oil dielectric strength
- Automatic 6-test protocol
- 80kV / 100kV AC test
- IEC 60156 standard test
- Electrode gap: 2.5mm ± 0.05mm
Dissolved Gas Analyser (DGA)
- Portable + online DGA units
- 9 key fault gases — H₂/CH₄/C₂H₂ etc.
- Duval triangle diagnosis
- IEC 60599 / IEEE C57.104
- Online continuous monitoring
Partial Discharge Analyser
- PD detection — pC level
- Acoustic + electrical PD testing
- Online / offline PD monitoring
- IEC 60270 standard
- Phase resolved PD pattern
CT / VT Accuracy Test Set
- CT ratio + phase angle error
- VT ratio + phase angle error
- Burden measurement
- IEC 61869-2 / IS 2705 test
- 0.1 class reference standard
Infrared Thermography
- Thermal imaging camera — IR
- Hotspot detection on bushing/LV
- Online thermal monitoring sensor
- IEC 60068 thermal assessment
- Report: ΔT temperature rise
Get a Transformer Quote & Technical Proposal
Share your transformer requirement — kVA rating, voltage ratio, vector, cooling type, installation, and special features — and our transformer engineering team will respond within 24 hours with a detailed technical proposal and commercial offer.
Transformer Sales & Engineering
transformers@niccauind.in | sales@barrel.energy
Spares & Accessories
spares@niccauind.in — Buchholz, PRD, WTI, oil, bushings
Export Enquiries
export@domextradlink.com — DomEx TradLink
📦 Transformer Enquiry
Share your requirement — we respond within 24 hours with a technical proposal and pricing.
1 kVA
TO 500 MVA.
EVERY TRANSFORMER. EVERY VOLTAGE. ONE MANUFACTURER.
From a 1 kVA single-phase distribution transformer for a rural feeder to a 500 MVA 765kV EHV power transformer for a PGCIL interstate grid; from a 250 kVA solar inverter step-up to a 100 MVA auto-transformer for grid interconnection; from a cast resin transformer for a hospital OT to an explosion-proof unit for an oil refinery — Niccau Industries manufactures every transformer, to every standard, for every application. BIS certified. BEE 5-Star rated. PGCIL approved. Exported worldwide through DomEx TradLink.
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© Niccau Industries Limited — Transformer Division | Associate of BARREL / StenJaan Global Group | Export: DomEx TradLink