Product categories

Polymer condenser transformer bushing

Description

Introduction

RIF (resin impregnated fiber) condenser transformer bushing is often used as the outgoing bushing of transformers, which plays the role of lead fixing support and ground insulation.

Structures

RIF condenser transformer bushing uses silicon rubber composite material or porcelain for external insulation, RIF composite material for internal insulation. The capacitor core uses patented stress-splitting buffer layer technology. It reduces internal stress and makes product quality stable, improves the tolerance of cold and hot shock ability, and the level of safe operation.

Features

no oil-filling, no gas, environmental protection, free maintenance, antipollution, reliable sealing, excellent anti-leakage performance. It can withstand 72 hours of waterish logged test.
RIF transformer bushing has high mechanical strength, it can withstand 1250N horizontal and vertical directions of each 1-week duration tensile test.

Resin impregnated fiber capacitive polymer transformer bushing

Rated insulation level and partial discharge level

Highest voltage(Um)	Rated Voltage(Ur)	Power frequency withstand voltage (kV)		BIL(kV)	pC	Tanδ (%)	Ith(kA)
(kV)	(kV)	dry	wet	BIL(kV)	pC	Tanδ (%)	Ith(kA)
12	10	28	28	75	≤10	≤0.4	25Ir
24	20	50	50	125	≤10	≤0.4	25Ir
40.5	35	95	80	200	≤10	≤0.4	25Ir
72.5	66	160(140)	140	350(325)	≤10	≤0.4	25Ir
126	110	230(185)	230(185)	550(450)	≤10	≤0.4	25Ir
252	220	460(395)	460(395)	1050(950)	≤10	≤0.4	25Ir

Dielectric loss factor is not greater than 0.005 under 10kV and 1.05Um/√3 (ambient air temperature 10~40?).

The highest temperature rising of winding is not greater than 75K.
Rated short-time thermal current is twenty-five times rated current when time keeps up 1 second.
Minimum values of cantilever withstand load:

Highest	Rated current ?A?
voltage	Rated current ?A?
Um (kV)	≤800	1000~1600	2000~2500	≥3150
12	1000	1250	2000	3150
24	1000	1250	2000	3150
40.5	1000	1250	2000	3150
52	1000	1250	2000	3150
72.5	1000	1250	2000	4000
126(123)	1250	1600	2500	4000
145	1250	1600	2500	4000
252(245)	1250	1600	2500	4000

? Acceptance and Maintenance
Every high-voltage wall bushing has passed the tests including power frequency withstand voltage, partial discharge, dielectric loss factor, and terminal withstand voltage before leaving the factory. We follow up GB/T4109, IEC 60137 and GOST 55187. In general, the bushings need no maintenance. It is enough to check the primary winding capacity and dielectric loss factor every 2~3 years.

? Transportation and installation
· The products should be packed with shockproof material when they are transported.
· Pay attention to the porcelain coat when the products are suspended.
· Documents: certificate, test report, product manual. They should be put into a packing box with the products.
· Please earth reliably the terminal of the products after installation.
? Notice for order
You should specify the following parameters at least when ordering?
· Electric parameters? Highest voltage, rated current, rated short-time thermal current, creepage distance.
· Environment condition? ambient air temperature, altitude, pollution class, installation way.
We can offer special products too.