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Single-Phase Oil Immersed Distribution Transformer

Overview

HSLEC designs and manufactures a complete line of single phase oil immersed distribution transformers. These highly reliable power transformers are produced in a wide variety of ratings and accessory combinations.

We utilize state-of-the-art technology in our design and manufacturing systems, supported by our ISO-9001 certified processes and quality assurance programs, to provide reliable and cost-effective power distribution components.

Optional Features & Accessories
1. Broad selection of design efficiencies to meet specific customer applications and DOE minimum requirements.
2. Automatic pressure relief valve.
3. High-voltage taps with external tank mounted no load tap changer.
4. Dual high-voltage ratings (not available with taps).
5. Drain and sampling valve.
6. Connectors for grounding.
7. Stencils and labels according to customer requirements.
8. External tank mounted high-voltage lightning arrester.
9. Low-voltage circuit breaker with reset (and optional overload signal light).
10. Internal high-voltage expulsion fuse.
11. Under-oil arrester.
12. External low-voltage surge arrester. 13. Interlaced secondary windings (through 50 kVA ratings).


14. RUS compliant 1 bushing designs with double hanger bracket configuration (through 50 kVA).
15. Stainless steel tank, cover, clamping band.
16. Extra creep options for high-voltage bushings.
17. Variety of features available for wildlife protection.

Routine tests
1. Leak test.
2. Polarity and phase relation.
3. Resistance.
4. No-load losses and excitation current.
5. Load losses and impedance.
6. Applied voltage.
7. Induced voltage.
8. Full wave impulse.
9. Ratio test.

Technical Parameters
Rated Capacity Vector Group Voltage Combination kV No-load Current No-load Loss Load Loss Short-circuit Impedance
High Voltage High Pressure Regulating Range Low Voltage
H.V. % L.V. % W (75 ℃ ) W %
5 II 0 10 ±2X2.5% 2X0.24 4 35 145 3.5
10 3.5 55 260
16 3.2 65 365
20 3 80 430
30 2.8 100 625
40 2.5 125 775
50 2.3 150 950
63 2.1 180 1135
80 2 200 1140
100 1.9 240 1650
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