PRODUCT PREVIEW
Transformers
Project-specific power transformation
Wafr Medium & Large Power Transformers provide high-capacity voltage transformation for Canadian utility, generation, renewable-energy, mining, industrial and critical-infrastructure substations.
This product family covers applications beyond conventional distribution-transformer ratings, including transformers above 3000 kVA and/or above 34.5 kV primary voltage.
Each transformer is engineered specifically around system voltage, MVA rating, impedance, short-circuit requirements, cooling, insulation level, tap-changing requirements, environmental conditions and utility specifications.
Specification
Configuration
Typical Capacity
3 MVA to 200+ MVA
Primary Voltage
34.5 / 44 / 69 / 115 / 138 / 230 kV classes
Secondary Voltage
Project specific
Frequency
60 Hz
Cooling
ONAN / ONAF / OFAF / ODAF
Tap Changer
DETC / OLTC
Insulating Fluid
Natural ester / approved alternative
De-Energized Tap Changer (DETC)
For voltage-ratio adjustment when the transformer is de-energized.
On-Load Tap Changer (OLTC)
For automatic voltage regulation while energized, with AVR, SCADA interface and parallel control.
Smart Monitoring
Online DGA, bushing, OLTC and cooling-system monitoring with SCADA communications.
OLTC systems can include:
Available cooling arrangements include:
Typical dual ratings can be provided, for example 30/40/50 MVA ONAN/ONAF/ONAF, or according to project requirements.
Key Features
| Parameter | Available Range |
|---|---|
| Transformer type | Liquid-filled power transformer |
| Typical capacity | 3 MVA–200+ MVA |
| Higher ratings | Project specific |
| Primary voltage | 34.5 / 44 / 69 / 115 / 138 / 230 kV classes |
| Secondary voltage | Project specific |
| Frequency | 60 Hz |
| Phases | Three-phase |
| Cooling | ONAN / ONAF / OFAF / ODAF as applicable |
| Windings | Copper |
| Insulating fluid | Natural ester / approved alternative fluid |
| Tap changer | DETC / OLTC |
| Installation | Outdoor substation |
| Neutral | Solid / resistance / impedance grounded as required |
| Monitoring | Comprehensive transformer monitoring available |
Final ratios are project specific.
Wafr power transformers are engineered, manufactured and tested to applicable requirements including:
