Description

single-phase distribution transformers, manufactured in accordance with NEMA standards, are economical power equipment with advanced winding design features for reducing no-load and load losses.

High-grade silicon steel is used for the core. Special treating methods to obtain greater di-electric and insulating strength and ensures durability.

FEATURES
A. Low Transformer Loss

High-quality cold rolled, grain-oriented silicon steel is used core designed for the most efficient power transformation, resulting in greatly reduced values of no-load losses.

B. Special design for continuous overload

Highly heat resistant insulation paper is used in between windings. Though the rated temperature rise of these transformers is 66° C at 100% continuous load operation. The actual temperature rise of Delta Star Distribution Transformers by test is only 55° C at full load operation. Thus these transformers can be operated under continuous overload until the temperature reaches 65° C.

Basis of Performance

1. Service condition

For best performance the ambient air temperature should not exceed 50° C and the average ambient air temperature for any 24-hour period should not exceed 30° C. The transformers are designed for operation at an altitude of 1,000 meters or less.

2. Temperature rise

The temperature rise above the ambient temperature will not exceed the next value.