Transformer ABB 25MVA is three-phase oil-immersed design.

Specifications Transformer ABB 25MVA

Type: KTRP 36 NC 25000
Rated Power [kVA] 25000
Cooling: ONAN
Primary Voltage[V]: 33000 no load at 50 Hz/39600 no load at 60 Hz
Tappings: ±2×2.5% Primary
Primary Winding Conductor Material: Cu
The Primary Insulation Level [kV]: LI 200 AC 70
Primary Bushing Insulation Level[kV]: LI 250 AC 70

The Secondary Windings

Voltage [V]: 11500 no load at 50 Hz/16500 no load at 60 Hz
Winding Conductor Material: Cu
Secondary Insulation Level: [kV]: LI 95 AC 34
Secondary Bushing Insulation Level [kV]: LI 125 AC 55
Frequency [Hz] 50 alternatively 60
Vector Group: YNyn0
Temperature Class: Max. Temperature Rise (Oil/Winding) [K/K] 50/55
Maximum Ambient Temperature [°C]: 40
Altitude [m] 1000

Guaranteed Values with Tolerances According to Standards

Transformer ABB 25MVA

Standards: IEC60076
Impedance, Uk ± (*) [%] 10.0 at 50 Hz/8.3 at 60 Hz
No Load Loss, Po [W] 13200 at 50 Hz (*) /16500 at 60 Hz
Load Losses, Pk @ 75 °C + / ± (*) / – [W]
113000 / 115000 / 119000 at 50 Hz
85000 / 83000 / 82000 at 60 Hz

Preliminary Values
Length [mm]
Width [mm]
Height [mm]
Active Parts [kg]:18100
Heaviest Transport Part [kg]: 28000 (**)
Weight of Oil [kg]: 7400
Total Weight[kg]: 3600014 KTRP 36 N 90008

Transformer ABB 25MVA Type of Design

Tank Construction: Conservator type vacuumproof tank with bolted cover
Insulation Liquid: Nynäs Nytro 10XN (IEC60296 class IIA)
Surface Treatment: painted tank (zinc base) RAL7035 light grey, 200 μm according to standard EN ISO 12944 environmental class C3
hot dip galvanized 55μm and painted radiators 160μm

• Standard Features
• detachable radiators with radiator shut-off valves
• off-circuit tap changer
• porcelain bushings
• lifting hooks
• jacking lugs
• pulling eyes
• drain valve
• sampling valve
• earthing terminals (2)
• rating and diagram plates

ABB Accessories
– air insulated HV cable termination box, LV box busducted to side HV undrilled aluminium grand plate, excluding cable termin., glands
– conservator shut-off valve
– oil level indicator, contacts: min 1NO, max 1NO
– pressure relief device, contacts: min 1NO, max 1NO
– winding temperature indicator, contacts: alarm 2NO, tripping 2NO

Additional
– terminal box (aluzinked and painted IP55, ventilation opening IP44 for auxiliary wire armoured cables
– filter valve with blank flange
– bi-directional skids
– copper windings
– silicagel breather
– Buchholz relay with change-over contacts (1NO/1NC)
– oil thermometer, contacts: alarm 2NO, tripping 2NO
Guaranteed with tolerance according to standards at 50 Hz. Values at 60 Hz are informative
Radiators and cable box are detached for transport and delivered separately packed