S13 / S20 / S22 10 kV Low-Loss Power Transformer

Overview

The series suits high-rise buildings, commercial centres, metro systems, airports, industrial plants, drilling rigs and oil-production platforms — sites with strict fire-protection requirements or severe operating conditions — as well as residential districts, shopping streets and rural power and lighting distribution.

Technical features

• Low loss and high efficiency: high-grade cold-rolled grain-oriented silicon steel and an optimised core design bring both no-load and load losses well below conventional transformers. The S22, the highest efficiency grade, lowers no-load loss further than the S13, cutting energy consumption and operating cost over the service life.
• Fully sealed for a long life: the sealed tank has its cover bolted or welded to the tank rim for a permanent seal, so the oil never contacts outside air. This prevents moisture ingress and oxidation, slows insulation ageing and — under normal conditions — allows maintenance-free operation with no oil change during the service life.
• Compact and quiet: new materials and processes cut electromagnetic noise, while the sealed design removes the conventional conservator, so the unit is lower and smaller in footprint than comparable products and easy to install where space is limited, with little impact on its surroundings.
• Safe and adaptable: good resistance to moisture, dust and corrosion with a high degree of protection for coastal, humid, dusty or salt-laden environments. The sealed construction removes any risk of oil leakage, making the unit suitable for underground distribution rooms, petrochemical areas and flammable or explosive environments.

Efficiency grades and selection

The three types correspond to three loss levels — S13 to NX3, S20 to NX2 and S22 to NX1 — with identical capacities and voltage combinations, so the choice follows the project's efficiency requirement and payback period. The table below gives the performance data of the 10 kV S22; the S13 and S20 grades are equally available, to the parameters of their respective standards.