NOMINAL CHARACTERISTICS

– Power range: 45 to 3,000 kVA

– Primary voltages:

• Class 15 kV: NBI 95 kV
• Class 24.2 kV: NBI 125 kV
• Class 36.2 kV: NBI 150 kV

 

– Secondary voltages: 220/127 V, 380/220 V or 440/254 V;

Frequency: 60 Hz

– Temperature rise: 55°C

– Thermal class: 105°C

STANDARD FEATURES

– Comply with IEEE/ANSI standards;

– They meet the standards of the energy concessionaires;

– No-load tap changer with external actuation (in transformers with taps);

– Secondary terminals;

Grounding terminals;

– Primary bushings;

– Fuel tank cap screwed on;

– Drain valve;

– Filling plug;

– Pressure relief device;

– Metal barrier between AT and BT compartments;

Access to the AT compartment is only possible after opening the BT compartment;

– Ears for suspension;

– Identification plate;

Bayonet ejection fuse;

– Current limiting fuse;

– Oil level indicator (E2 mineral insulating oil).

OPTIONAL FEATURES

– Temperature rise: 65°C or 75°C;

– Construction for ring or radial system;

– Pressure and/or vacuum indicator;

– Oil temperature indicator with or without electrical contacts;

Vegetable insulating oil;

– Pressure relief device with or without electrical contacts;

– Welded tank lid;

– Paint for harsh environments;

– Disconnecting switch in the LV circuit;

– NH fuse in the LV circuit;

- Circuit breaker in the LV circuit;

– High-voltage switch with two positions (on/off) for operation under load;

– 3 or 4 position AT switch;

– Frequency of 50 Hz

– Deadbreak or loadbreak insertion plug.