EN 24kV250A Transformer Bushing Type 2

H=385mm

D=150mm

Creepage Distance: Min525mm

Rated Voltage: 24KV

Rated Current: 250A

Power Frequency Withstand Voltage Dry: 70KV

Standard

 EN - Indicates compliance with European Norms (standards developed by European standardization bodies like CENELEC). For bushings of this type, EN 50180 ("Bushings up to 36 kV and from 250 A to 3,15 kA for liquid filled transformers") is highly relevant as it specifies dimensions and types for interchangeability. The general requirements likely also align with EN IEC 60137 ("Insulated bushings for alternating voltages above 1000 V").   

Rated Voltage 24KV

Within the EN standard context, this typically refers to the maximum system voltage (Um​). The corresponding nominal system voltage (Un​) is usually 20 kV.

Rated Current 250A

This is the rated continuous current (Ir​) the bushing can carry.

Type 2 means that refers to a specific interface type defined in EN 50180. Type 2 bushings have standardized dimensions, particularly for the fixing flange and the lower end (oil side connection), ensuring interchangeability between different manufacturers' products conforming to the standard. For the 24kV 250A rating, Type 2 dimensions are generally based on those historically defined in the German standard DIN 42531.

This is a transformer bushing designed according to European standards (EN) for use on liquid-filled (typically mineral oil) distribution transformers. It's rated for electrical systems with a nominal voltage of 20kV (maximum 24kV) and can continuously conduct up to 250A. 

Application

Primarily intended for outdoor installation on distribution transformers used in 20 kV electrical networks across Europe and other regions adopting EN standards.

Material

Typically manufactured from high-quality electrical porcelain (brown or grey glazed) or potentially composite materials (silicone rubber sheds over a fiberglass core).

Function

Provides reliable electrical insulation, allows the conductor to pass through the transformer tank, offers mechanical support, serves as the external termination point, and ensures a seal against the transformer liquid and the external environment.

Creepage Distance 

While not specified by "EN 24KV250 Type 2" alone, the actual bushing will have a defined creepage distance (e.g., 525 mm or more) chosen based on the intended environmental conditions (pollution level) according to EN/IEC standards.