Products
Transformers from distribution to transmission.
Delstar supplies Australasia's premier transformer range. Sourced from premium international manufacturers, engineered for New Zealand and Australian seismic and corrosion conditions, and specified to your network's technical, operational, and lifecycle requirements.
7 product families
The transformer range
Power Transformers and Reactors
Bespoke transmission-class power transformers, autotransformers, phase shifting transformers, and reactors up to 550 kV.
- Voltage class
- Up to 550 kV Um
- Ratings
- 630 kVA to 1,170 MVA
- Types
- Power, autotransformers, phase shifting, rectifier, furnace, traction, reactors
Pole and Pad Mounted Transformers
Pole and pad mounted distribution transformers from 1 kVA to 5,000 kVA for utility, industrial, and rural networks.
- Primary voltage
- 6.6 / 11 / 22 / 33 kV
- Ratings
- 1 kVA to 5,000 kVA
- Mounting
- Pole and pad (including kiosk-style)
Dry Type Transformers
Cast resin dry type transformers up to 66 kV and 40,000 kVA for buildings, data centres, rail, generation and harsh environments.
- Voltage class
- Up to 66 kV
- Ratings
- Up to 40,000 kVA
- Types
- Cast resin, OLTC, amorphous core, special duty
Instrument Transformers
Cast resin, oil-paper, and gas-insulated CTs, VTs, and CVTs from LV through to EHV.
- Voltage class
- LV, MV up to 52 kV; HV and EHV up to 550 kV Um
- Types
- Metering, protection, CVT, combined, LPIT
- Accuracy classes
- 0.1 / 0.2S / 0.5S; 5P / 10P / PX
Voltage Regulators
Single-phase and three-phase step voltage regulators for MV distribution feeders.
- Voltage class
- Up to 36 kV Um
- Ratings
- 38.1 kVA to 833 kVA / phase; 500 to 5,000 kVA three-phase
- Tap changer
- 32-step on-load, ±10% regulation
Vacuum Oil Treatment Plants
Oil degasification, filtration, regeneration, and transformer dry-out in stationary, movable, and trailer-mounted units.
- Throughput
- 500 to 6,000 L/h standard; up to 20,000 L/h bespoke
- Vacuum system
- Bespoke-sized to transformer tank and dry-out method
- Configurations
- Stationary, movable, trailer-mounted
Transformer Accessories
Radiators, tap changers, protection relays, temperature indicators, breathers and bushings for new transformers, retrofit and replacement.
- Supply
- New and retrofit
- Cooling and tap changing
- Radiators, fans, pumps, OLTC, DETC
- Protection and monitoring
- Relays, indicators, fibre optic sensing
Where it is used
Applications
Delstar transformers are supplied across applications where reliable transformation and network stability are critical:
- Grid transmission (substation step-up and step-down)
- HV / EHV network interconnection
- Distribution networks (MV and LV)
- Generation step-up (utility and independent power producer)
- Renewable interconnection (solar farms, wind, BESS)
- Data centre and hyperscale power infrastructure
- Industrial and captive power (mining, oil and gas, heavy industry)
- Rail traction and electrification
- Reactive power compensation and fault-current management
- Asset renewal and replacement programmes
Sourcing and quality assurance
We source premium transformers from established, highest-quality international manufacturers whose units are operating in demanding networks worldwide. Where transformers fall short in service, the cause is typically traceable to design, materials, or manufacturing quality. Every unit supplied is:
- Available with seismic qualification and with corrosion protection for harsh coastal and industrial environments, for installations that require it
- Supplied with full routine test reports and material traceability
Lifecycle support
Our transformer supply is backed by the engineering services required to install, commission, and maintain equipment over its operational life:
- Installation and commissioning
- Testing services (diagnostic testing, condition assessment)
- Asset management (lifecycle planning, remedial works, end-of-life planning)
Talk to our team
Discuss your requirements
Tell us what you are specifying, sourcing, or scoping, and we will come back with recommendations tailored to your application.