Product categories

CWW porcelain wall bushing

Standard: IEC60137, GB/T4109.
Rated voltage?12kV-0.5kV
Rated current?10A-8000A
Temperature: -50 ? to +55?
Altitude: 1000m?conferring with consumer if above 1000m?
Pollution class?? for indoor, ? for outdoor.

Description

CWW Porcelain wall bushing

CWW Porcelain wall bushing is composed of porcelainbushing, conductor, mounting flange and end accessory. The main insulator is porcelain sheds. The mounting flange is normally grounded. The conductor passes through the heavy current. The current-carrying conductor is busbar.

Features

Porcelain wall bushing comprises porcelain bushing, a current-carrying conductor, an intermediate flange, and end accessories. The main insulation is porcelain sleeves. The intermediate flange is normally grounded. The current conductor of the wall bushing is a copper or aluminum busbar. The conductor passes through the HV current. The end accessories serve as a connection between the conductor and the porcelain sheds. The surface of the porcelain sleeves is provided with an umbrella to increase the creepage distance and improve the discharge characteristics. To increase the corona and sliding flashover voltage of 12-40.5kV bushing, the porcelain sleeves are provided with large sleeves on both sides of the flange and covered with semi-conductive glaze.

Parameters

Standard: IEC60137, GB/T4109.
Rated voltage:12kV-0.5kV
Rated current:10A-8000A
Temperature: -60 ℃ to +55 ℃
Altitude: 1000m?conferring with consumer if above 1000m?
Pollution class: for indoor, ? for outdoor.

Operation voltage Um(kV)	Rated voltage (kV)	Power frequency withstand voltage (kV)		Lightning impulse withstand voltage (peak) (kV)	Rated short-time thermal current (kA)
Operation voltage Um(kV)	Rated voltage (kV)	dry	wet	Lightning impulse withstand voltage (peak) (kV)	Rated short-time thermal current (kA)
12	10	28	28	75	25Ir
24	20	50	50	125	25Ir
40.5	35	80	95	200	25Ir

Current value and bending failure load?

Rated current(A)	250	400	630	1250	1600	2000	3150	4000
Bending load≥ kN	4	4	4	4	4	8	8	8

Installation

There are two installation methods for bushings on walls or tank shells: forward installation and reverse installation. The copper conductor wall bushing has both methods, which often easily make mistakes during operation, resulting in a shortened discharge distance and affecting bushing performance. The aluminum conductor and busbar wall bushing have unified reverse installation, which effectively utilizes the height of the porcelain bushing and reduces the size of the bushing.