50%
75%
25%
No Capacitive Grading (bulk bushing) Uncontrolled field follows the laws of nature unequally stressing porcelain, oil, epoxy and/or paper insulation system
Bushing Technologie bulk bushing vs. condensor bushing
Field controlled 50% by capacitive grading follows controlled contours making effective use of all insulation 25%
Capacitive Grading (condenser bushing)
75%
3'
7DQGHOWD
IEEE C57.19.
2,/),//(' %86+,1*6
< 250 pC
< 10 pC
< 0,007
yes
no
no
no
g paper, resin impreg.
Resin Impregnated Paper
RIP
'5<%86+,1*6
no, only oil-tight
< 10 pC
yes
*DVWLJKW
no
< 0,015
yes
2LOJDXJH
no
no
< 0,007
yes
2LOH[SDQVLRQ FKDPEHU
IEC 60137
yes, on both sides
+RXVLQJFRYHU
paper, resin bonded
Resin Bonded Paper
Oil Impregnated Paper g paper, oil impregn.
RBP
OIP
0DLQ,QVXODWLRQ
7\SH
Bushings Technologies
Bushing Technologie RIP & OIP Technology
Aluminium foils
Special crepe paper
Conductor: - Al, Cu, - solid, tube
Production of R I P Bushings
1 Winding process
4 Curing process
2 Drying process: - vacuum - heating
3 Under vacuum epoxy resin impregnation process p
Production of R I P Bushings
6 Assembly
5 Machining
Production of R I P Bushings
(1)
- Easy adaptable dimensions, dimensions customer-tailored customer tailored bushings
- No porcelain shell, except for outdoor use
SUPERB IN DESIGN
- High thermal strength (class E, 120° C)
- Excellent mechanical strength
- PD free up to double service voltage
- Low dielectric losses (tg delta < 0,35%)
HIGH TECHNICAL STANDARD
R I P Bushings Main Advantages
- No pollution by out flowing oil
- Pressure - free = explosion proof, fire resistant
ENVIRONMENTALLY FRIENDLY
- Dry, oil - free = simple in handling
- Each position allowed (vertical to horizontal)
SIMPLE AND RELIABLE
STORAGE, INSTALLATION AND SERVICE:
R I P Bushings Main Advantages
(2)
Experience in all three technologies (RBP, OIP, RIP)
Our bushing are reliable (25 years and more)
Flexible to produce different bushing versions
customized solution
Specialised in retrofit bushings (reproduction)
Guarantee the 100% interchangeability
40 years experience with Resin Impregnated Paper
20 years experience with Composite Insulator
(since 1926 more than 580‘000 produced Bushings)
Largest number of bushings in service worldwide
Advantages vs. Competitors
IEC 60137 tan į and partial discharge
Bushings Technologies High technical standard
IEC 60137 tan į and partial discharge
Bushings Technologies High technical standard