Single Phase Compact Oil Immersed Power Distribution Transformer 11kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Model NO.	Single Phase Compact Oil Immersed Power Distribution Transformer 11kV
Rated voltage	11kV
Rated frequency	50/60Hz
Rated capacity	125kVA
Series	D

Description

The Rockwill compact single-phase oil-immersed distribution transformer combines proven engineering with innovative design for residential, commercial, and industrial applications. Optimized construction and premium materials ensure reliable performance under diverse operating conditions.

Key Features

Compact design ： Reduced dimensions and lighter weight compared to conventional single-phase transformers, easing handling and installation
Oil-immersed construction： Mineral oil insulation and self-cooling enable quiet, dependable outdoor operation with minimal maintenance
Wide capacity range： Available from 10 kVA to 333 kVA to match varied distribution load requirements
Flexible voltage adaptation： Primary voltage ratings up to 34.5 kV, compatible with both 50 Hz and 60 Hz systems
Robust enclosure： Fully sealed, weatherproof tank prevents oil leakage and moisture ingress for long service life

Technical Parameters

Parameter	Value
Phase	Single-phase
Rated capacity	10 – 333 kVA
Frequency	50 / 60 Hz
Primary voltage	Up to 34.5 kV (11 kV standard)
Secondary voltage	As specified
Insulation level (IEC)	12 / 28 / 75 kV (Um / PF / LI)
Tapping range	±2 × 2.5 % (off-circuit)
Winding material	Copper / Aluminum (optional)
Cooling method	ONAN (Oil Natural Air Natural)
Insulation medium	Mineral oil
Vector group	I-I0
Standards	IEC 60076, ANSI / IEEE (as specified)

Applications

Single-phase distribution for residential communities and rural power networks
Commercial facilities requiring compact single-phase supply
Step-down transformation for light industrial loads
Replacement or upgrade of existing pole-mounted or pad-mounted distribution transformers

Custom voltage ratings, tapping arrangements, impedance values, and mounting configurations are available on request. Contact Rockwill for application-specific design and quotation.

Negotiable

Pricing calculator

Model

D-11/160

D-11/125

D-11/80

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Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.