Oil Immersed Transformers

Standard Design

Bahra TBS is implementing the unique concept of oval-shaped cores and windings, which has advantages like

Routine Tests

Type Tests

Special Tests

Applications

Packaging

These transformers are with HV and LV cable boxes on the opposite with Ingress of protection of IP54. Installation can be outdoor or indoor depending on the type of applications.

Technical Data

Pole mounted transformers are electrical distribution transformers mounted on a utility pole (wood or concrete) and usually at the level of overhead cables.

Technical Data

The device transformer is designed for commercial and industrial applications to convert distribution voltages to operating voltages. They are constructed so that they are easy to interconnect with both a primary and secondary switch.

Technical Data

The name of cooling types of oil distribution transformers depends on the flash point of the oil used in the transformer. Mineral oils are marked with the letter “O” and have a flash point of at least 135 °C according to standard IEC 60296- Ed.5, 2020.

Non-mineral oils such as silicone oil, synthetic ester (also known as “Midel” in the market) and Natural Ester (vegetable oils) are marked with the letter “K” because their flash point is higher than 300°C.

Each KNAN converter cooling letter stands for: K - Indicates flash point above 300 degrees Celsius. N - Natural. A - Air. N - Natural

Features

Bahra TBS Package and Unit Substations are completely self-contained solutions for power distribution that include outdoor duty enclosure, medium voltage switchgear, distribution transformer, low voltage panel, and accessories such as power factor improvement equipment, control and protection equipment, all providing a cost effective and efficient total installation. It can be manufactured Step Down/Step up substations, MV/MV, MV/LV, LV/LV.

The solution packages are built in accordance to IEC Standards and Saudi Electricity Company (SEC) specifications, where the distinguished design provides the customer with a high level of flexibility to cover a wide range of applications.

The construction of the unit substation is almost the same as the package substation but without RMU on the MV side.

MV Side (Ring Main Unit): Each package substation contains the MV part which is in most cases the Ring Main Unit, known as the (RMU). Bahra TBS will provide only SEC approved manufacturer.

Transformer: The transformer is the main part of every package and unit substation, where the type is changeable based on customer specification and application: • Oil immersed conservator type or hermetically sealed or dry type transformers can be installed • Transformer bushings can be located on top or side of transformer as per customer needs • Wide range of transformer capacities up to 2500 kVA • Typical kVA’s: 100, 150, 160, 200, 250, 300, 315, 400, 500, 630, 750, 800, 1000, 1200, 1250, 1500, 1600, 2000, 2500 • Bahra TBS package and unit substations are designed for simple and easy transformer installation onsite or integrated into the PSS in the factory.

Low Voltage Panels: LV Panel is manufactured for safe distribution and efficient control of electricity in residential, commercial and industrial premises. Bahra TBS LV products conform to most national and international standards.

Features