By maintaining our policy, we ensure that our transformers will always exceed our competitor’s products. We produce hermetically sealed transformers (closed construction type without conservator) that are recommended for use in high humidity environments, limited maintenance service availability, and limited dimensions such as package sub-station. We emphasize the need for analysis of performance in order to confirm that planning for problem solving leads to quality improvement. Monitoring of performance and revision of systems is essential and is performed with the most powerful diagnostic tools. We improve the effectiveness of the quality management system through the effective implementation of the Company Policy, quality objectives, audit results, analysis of data, corrective actions and management review.

Quality Policy:

(The quality policy below is for the group that the union transformer company is part of it) Union Electric Group provides wide range of products in electrical power sector and it’s equipment, from distributing transformers to power & control cables with various voltages, as well as plastic compounds. We seek to be a company measured by global standards with a leading brand locally and regionally by providing safe products with high quality that meet customer’s requirements. Top management is committed to quality management system requirements ISO 9001:2015, national and international standers through continuous improvement and development in a manner that achieves quality objectives.

utc ISO

Testing & Quality Control (according to the last issue of IEC 60076)

The following tests are made on all transformers:

  • Measurement of winding resistance.
  • Measurement of voltage ratio and check of phase displacement.
  • Measurement of short-circuit impedance and load loss.
  • Measurement of no-load loss.
  • Dielectric routine tests (IEC 60076-3).
UTC testing


The transformers comply with the requirements of the following standards: IEC 296 Specification for the mineral insulating oil of the transformers and switch gear IEC 76 Power transformers IEC 137 Insulated bushings

Standard fittings:

The transformers are delivered complete with:

  • Transformer oil
  • High & LV bushings
  • OCTC in 5 positions
  • Lifting lugs
  • Earthing terminals
  • Thermometer pocket
  • lifting lug
  • Drain valve
  • Name plate
  • Dial type thermometer with 2 contacts (Transformers from 25 t0 200 kVA)
  • Pressure relief device
  • Wheels
  • Multi-function Protection relay (Transformers from 400 to 2500 kVA)

Design and Development

As a quality of the transformers is of the utmost importance, the best mechanical and electrical designs for all kinds are done, which meet customer’s requirements and technical standards. The product is designed to optimize:

  1. Control of the losses.
  2. Specific performance characteristics such as resistance, temperature rise, efficiency and noise level.
  3. Adjust the mechanical design with fittings and accessories for specifying overall dimensions and weight.