132kV 60 MVA Transformer

Primary Voltage Ratings: 132 kV
Secondary Voltage Ratings: 11.5 kV
H.V. TAP RANGE: 17 STEPS TAPPING WITH EACH STEP 1.5%
CONNECTION TYPE: DYN11
TYPE: FREE BREATHING, CONSERVATOR TYPE
Standards: IEC
Application: QATAR POWER TRANSMISSION SYSTEM
Power Rating: 60MVA
Cooling Method: ONAN

The 132 kV 60 MVA transformer is an outdoor, oil-immersed, three-phase unit with an on-load tap-changer, designed for continuous operation in a 50 Hz transmission system. It has a 50°C temperature rise, 10°C below IEC limits, and is suitable for tropical, corrosive environments. The transformer features IP55 protection, high-quality construction, and accessories for operation and maintenance, including a welded steel conservator and ONAN cooling. It meets latest design standards, suppresses harmonic currents, and is tested per IEC standards.

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The 132 kV 60 MVA transformer is an outdoor, oil-immersed, three-phase unit with an on-load tap-changer, adhering to IEC standards. Insulation A class. Designed for continuous operation in a 50 Hz high-voltage transmission system, it features a temperature rise of 50°C, which is 10°C lower than the limits specified by IEC 60076-2 and IEC 60076-7.

Service and Environmental Conditions:

Max Ambient Temperature: 49°C
Min Ambient Temperature: -1°C
Direct Sunlight Temperature: 82°C
Design Ambient Temperature: 50°C
Max Relative Humidity: 96% at 49°C
Altitude: 7.25 meters above sea level
Environment: Corrosive and humid, tropical
Degree of Protection (IP): IP55

Additional Accessories:

Winding Temp Indicator with 2 Contacts
Liquid Level Indicator with 2 Contacts
Moving and Jacking Facilities
Liquid Temperature Indicator with Alarm Contacts
Pressure Safety Relief Valve with Alarm & Trip Contacts (2 sets)
Upper Filter Plug or Cap (for units above 2500 kVA)
DGPT2 Integrated Device
Lifting Eyes for Cover
Globe Type Combination Drain and Lower Filter Valve
Pressure-Vacuum Gauge (Sealed-Tank Construction)
Sampling Device
Pressure-Vacuum Bleeder Device (Sealed-Tank Construction)
Marshalling Panel/Cabinet
Tap Changer
Facilities for Lifting Core and Coil Assembly
Lugs for Lifting the Complete Transformer
Rating Plate with Winding Diagram
Stainless Steel Nameplates
Earthing Lugs (2 sets)
Breather/Drain for Terminal and Marshalling Boxes
Ground Pads
Fault Pressure Relay with Contacts
Space Heater for Marshalling Kiosk & Terminal Box
Valve for Radiator (Top & Bottom)
Padlocking Device for Tap Changer & Terminal Box

Design and Construction:

Meets the latest development standards in design, construction, and materials.
Capable of withstanding short-circuit currents and all tapping positions per IEC 60076-5.
Average surface noise level complies with NEMA TR1.
Designed to suppress harmonic currents, minimize interference, and prevent leakage flux overheating.

Mechanical Protection:

All external wiring, control panels, and accessories are shielded for rain protection.
Accessories, wiring, and components are robust for harsh Qatar weather.
Control cables are routed through metal conduits for protection.

Magnetic Circuit:

Core made from high-grade, non-aging, low-loss steel sheets.
Sheets are insulated with durable, heat-resistant varnish.
Core is clamped and braced to withstand short-circuit stresses and vibrations.

Windings:

Made of high-conductivity electrolytic copper with thermally upgraded paper insulation.
Assembled core and windings are dried in a vacuum to ensure moisture removal.