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Fully Sealed 5-167 kVA Single-Phase Pole-Mounted Transformer

Quantity:
SKU: 5257183714
Model: D-M Series

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Product Details

D-M Series · Rated 5-167 kVA

Fully Sealed 5-167 kVA Single-Phase Pole-Mounted Transformer

Oil-immersed ONAN distribution transformer for rural grids, irrigation and energy-saving upgrades.

Single-Phase Pole-Mounted Transformer D-M Series with fully sealed tank and side mounting brackets

Single-Phase Pole-Mounted Transformer, D-M Series.

Product Summary

The D-M Series single-phase pole-mounted transformer is an oil-immersed, fully sealed distribution transformer rated from 5 kVA to 167 kVA. Mounting directly on the pole removes the need for a distribution room, cutting civil works and reducing low-voltage line losses by more than 60%. It suits rural grids, scattered villages, irrigation loads and energy-saving upgrades where ground space and maintenance access are limited.

Key Features

Pole-mounted installation. Eliminates the distribution room, reducing civil costs and low-voltage line losses by more than 60%.

Fully sealed tank. Sealed carbon-steel construction with strong overload capability and high continuous-operation reliability.

Full capacity range. 5 kVA to 167 kVA covers single homes through small commercial users.

Standards and efficiency. ANSI/IEEE compliant design with DOE/CSA efficiency certification.

Core options. High-permeability silicon steel or amorphous alloy, selected to match project requirements.

Wide operating envelope. Rated for -40 C to +40 C ambient temperature and elevations up to 2,000 m.

Technical Specifications

ModelD-M Series
TypeSingle-phase pole-mounted transformer, oil-immersed, fully sealed
Rated capacity5-167 kVA
CoreHigh-permeability silicon steel or amorphous alloy (optional)
WindingsCopper windings with NOMEX paper or cable-paper insulation
TankCylindrical or elliptical carbon-steel tank, fully sealed
BushingsHV: porcelain or composite; LV: porcelain
CoolingONAN, natural mineral-oil circulation
AccessoriesDrain valve, oil-level gauge, grounding terminal, nameplate
Lifting and mountingTop lifting eyes and side mounting brackets
Ambient temperature-40 C to +40 C
Installation altitudeUp to 2,000 m
ComplianceANSI/IEEE compliant; DOE/CSA efficiency certification

Models and Options

Core material
High-permeability silicon steel or amorphous alloy

Tank form
Cylindrical or elliptical carbon-steel tank

HV bushing
Porcelain or composite

Rated capacity
Any rating from 5 kVA to 167 kVA

Materials and Structure

The magnetic circuit uses high-permeability silicon steel or amorphous alloy. Windings are copper, insulated with NOMEX paper or cable paper. The core and coils sit inside a cylindrical or elliptical carbon-steel tank that is fully sealed, with cooling by natural mineral-oil circulation (ONAN).

High-voltage bushings are porcelain or composite and low-voltage bushings are porcelain. A drain valve, oil-level gauge, grounding terminal and nameplate are fitted as standard, while top lifting eyes and side mounting brackets support pole installation and handling.

Applications

  • Rural grids in North America, Africa and Southeast Asia
  • Remote mountainous areas and scattered villages
  • Agricultural production and irrigation
  • Energy-saving upgrades for railway and urban grids
  • Temporary construction and emergency power

Units from this product family have been delivered for rural-grid projects in Mongolia, Azerbaijan and other countries.

Customization

Rated capacity, core material, tank form and bushing type can be configured within the D-M Series envelope. Apex Power Systems reviews each specification against its audited manufacturing partner network and confirms the configuration, drawings and test documents before production.

FAQ

What capacity range does the D-M Series cover?

The D-M Series is rated from 5 kVA to 167 kVA, covering single residential connections through small commercial users.

Why specify a pole-mounted unit instead of a ground-mounted transformer?

Pole mounting eliminates the distribution room, which reduces civil construction cost and cuts low-voltage line losses by more than 60%.

Which core materials are available?

High-permeability silicon steel or amorphous alloy; both are offered as options for the D-M Series.

What cooling method is used?

Natural mineral-oil circulation (ONAN) inside a fully sealed carbon-steel tank.

What environmental conditions are supported?

Ambient temperatures from -40 C to +40 C and installation altitudes up to 2,000 m.

Which standards and efficiency schemes apply?

The design is ANSI/IEEE compliant and carries DOE/CSA efficiency certification.

Which quality certifications cover the supply chain?

The audited manufacturing partner holds ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certificates, with a scope covering the design and production of oil-immersed transformers.

Inquiry Information

Apex Power Systems (Nanjing) Co., Ltd. is an international trading and supply partner for power transformers and substation equipment.

Contact: Simon

Email: xuke@apexps-nj.com

Tel / WhatsApp: +86 132-0157-1341

Address: Room 1001, Xinke Building, No. 209 Pubin Road, Jiangbei New Area, Nanjing, Jiangsu, China

Send your required capacity, core preference and bushing type to receive a matching configuration.

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