WINLEY’s substation transformers are designed, built, and tested in accordance with the highest industry standards including NEMA, ANSI C.57, DOE, and IEEE as applicable, The capacity ranges from 150Kva to 20000Kva, the primary voltage range is usually 2.4KV-69KV, and the secondary voltage range is usually 0.6KV-35KV, widely used in various utilities or small industrial scenarios.

WINLEY’s substation transformers are designed, built, and tested in accordance with the highest industry standards including NEMA, ANSI C.57, DOE, and IEEE as applicable, These substation transformers are absorb and utilize advanced domestic and foreign technologies to optimize the transformer core, coil, body, lead wire, oil tank and other components. They have the characteristics of low partial discharge, low loss, low noise, light weight and long service life.

Design capabilities

Substation transformer structure

WINLEY’s substation transformers incorporate advanced domestic and foreign technologies to optimize components such as the transformer core, coil, body, lead wire, and oil tank. These transformers are characterized by low partial discharge, low loss, low noise, lightweight, and long service life. They are designed for installation in both large and small three-phase transmission and distribution power systems.

Substation transformer Standard Features

• Electrical grade mineral insulating oil
• High-grade silicon-steel core
• Aluminum windings (distribution class)
• On-load tap changer
• Reinforced carbon steel tank
• Lifting lugs
• Externally clamped high- and low-voltage bushings
• Pressure relief valve
• Pressure vacuum gauge
• Liquid temp gauge
• Liquid level gauge
• Drain and sample valve
• Schrader valve
• Ground pads/lugs
• Nitrogen blanket
• 65 degree C rise

Substation transformer Optional Features

• Environmentally friendly, high fire-point FR3 oil (KNAN)
• Copper windings
• On-load tap changer
• Stainless steel tank
• Gauges with contacts
• Auxiliary control cabinet
• Winding temperature indicator
• Fan package (ONAN/ONAF)
• Lid-mounted pressure relief device
• Sudden pressure relay
• Lightning arresters
• 55/65 degree C rise
• Step-up solar and wind duty design
• Electrostatic shielding
• K-rated design
• Primary load-interrupter switch

Substation transformer drawing

Substation transformer high-voltage and low-voltage cables connect through bushings on the throat-type side end or the top, while their flexible core/coil and tank construction ensure that dimensional requirements can be met.

Substation transformer Specification

Testing

WINLEY performs routine testing on each transformer manufactured,including the following tests:
• Ratio, polarity, and phase relation:Ensures correct winding ratios and tap voltages; checks insulation of HV and LV circuits; checks entire insulation system to verify all live-to ground clearances.
• Winding resistance:Verifies the integrity of internal high-voltage and low-voltage connections; provides data for loss upgrade calculations
• Insulation power factor:Verifies that vacuum processing has thoroughly dried the insulation system to required limits
• Routine impulse tests:The most severe test, simulating a lightning surge;applies one reduced wave and one full wave to verify the BIL rating
• Applied potential: Applied to both high-voltage and low-voltage windings, this test stresses the entire insulation system to verify all live-to-ground clearances.
• Induced potential: Verifies the turn-to-turn and layer-to-layerinsulation at twice the rated voltage
• Loss test: These design verification tests are conducted to ensure that guaranteed loss values are met and that test values are within design tolerances; tests include no-load loss and excitation current along with impedance voltage and load loss
• Leak test: Pressurizing the tank to 5 psig assures a complete seal, with no weld or gasket leaks, to eliminate the possibility ofmoisture infiltration or oil oxidation

More Substation transformers