31.5 MVA 66kV/11kV Three-Phase Oil-Immersed Power Transformer

Spécifications techniques

Capacité nominale	31.5 MVA (31,500 kVA)
Haute tension	66.0 kV
Basse tension	11.0 kV / customized
Frequency	50 Hz / 60 Hz
Phase	Three Phase
Méthode de refroidissement	ONAN / ONAF optional
Vector Group	YNd11 / YNyn0 / customized
Tap Changer	On-load tap changer (OLTC) / Off-circuit optional
Tapping Range	+/-8 x 1.25% (OLTC) / +/-2 x 2.5% (OCTC)
Matériau de bobinage	Cuivre
Core Material	CRGO silicon steel, grain-oriented
Insulation Medium	Mineral insulating oil
Norme	IEC 60076 design reference
Installation	Outdoor substation / indoor GIS substation

Informations sur le produit

Statut

Publié

ID du produit

31_5_MVA_66KV_11KV_THREE_PHASE_OIL_IMMERSED_POWER_TRANSFORMER

Dernière mise à jour

2026-05-17T04:26:02.882452

Application Scenarios

Utility substation step-down at / for distribution networks
Grid interconnection and power transmission projects in Africa and MENA
Large industrial facility main power supply transformers
EPC contractor packages for power plant auxiliary and grid connection

Key Features

31.5 MVA rated capacity for utility substation and grid applications
high voltage class for sub-transmission and transmission grid interconnection
ONAN standard cooling with ONAF upgrade option for higher ambient temperature sites
On-load tap changer (OLTC) available for voltage regulation under load
Full copper windings with CRGO grain-oriented silicon steel core for low losses

Questions fréquemment posées

Please send us your required MVA rating, primary voltage, secondary voltage, frequency (Hz), cooling class (ONAN/ONAF/OFAF), vector group, impedance, and installation site conditions. We will respond with a technical proposal and indicative pricing within 24 hours.

The product can be produced according to IEC 60076 and customer technical specifications for power transformer applications. Routine and type tests including temperature rise, impulse, and short-circuit withstand are available. Third-party witnessed testing can be arranged.

Large power transformers are shipped with oil-filled or oil-free transport options depending on voltage class and destination. All units include full documentation: routine test report, nameplate data, packing list, and certificate of origin. Lead time is confirmed at order stage based on specification complexity.

Marchés et ressources connexes

🌍

Africa & MENA

11kV & 33kV IEC grid requirements

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Middle East & GCC

IEC 60076 · up to 132kV · high ambient

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Latin America

60Hz ANSI/IEEE · 13.8kV / 34.5kV

Guide de l'acheteur

Comment s'approvisionner en Chine

IEC vs ANSI Standards

Which standard for your project?

Normes et conformité