A triple-pole 8D.2 breaker is illustrated in Fig. (1) for
example Used in 132 KV
Each breaker pole consists of a chamber 11. Containing an
interrupter unit 22. Fig (1) anadapter housing 15. And an operating
mechanism 14. Complete with oil tank 14.3.The breaker chamber is
sealed gas-tight by two bushings 29. Fig (2- Next page). the
breaker thus forms an independent gas filled compartment.The gas
pressure in the breaker poles is indicated by a gauge in the
control and monitoringunit and is monitored by a density monitor.
www.sayedsaad.comThe control and monitoring unit is installed in
the control cubicle. It contains the pump set,all the devices for
electrical and hydraulic control and monitoring of the breaker
poles andalso the terminal blocks.The operating energy is produced
by compressing nitrogen in a storage cylinder 13. Fig (1)each pole
is fitted with a rupture diaphragm 11.3 fig (2- Next page) as a
protection against
unduly high gas pressure.A static filter 11.31 fig (2- Next
page) is fitted in the breaker chamber. Its purpose is toabsorb SF6
decomposition products and to keep the SF6 dry. Each pole rests on
a ball-typesupport 11.4. Fig (2- Next page) in this way, the
flanged joints of the modular assemblies isrelieved of strain. A
section through a breaker pole is shown in Fig (10)
Fig (1) Type 8D.2 breaker Make SIEMENS. www.sayedsaad.com
Each breaker pole consists of a chamber 11. Containing an
interrupter unit 22. Fig (1) anadapter housing 15. And an operating
mechanism 14. Complete with oil tank 14.3.The breaker chamber is
sealed gas-tight by two bushings 29. Fig (2- Next page). the
breaker thus forms an independent gas filled compartment.
The gas pressure in the breaker poles is indicated by a gauge in
the control and monitoringunit and is monitored by a density
monitor.
The control and monitoring unit is installed in the control
cubicle. It contains the pump set,all the devices for electrical
and hydraulic control and monitoring of the breaker poles andalso
the terminal blocks.
The operating energy is produced by compressing nitrogen in a
storage cylinder 13. Fig (1)each pole is fitted with a rupture
diaphragm 11.3 fig (2- Next page) as a protection againstunduly
high gas pressure.
A static filter 11.31 fig (2- Next page) is fitted in the
breaker chamber. Its purpose is toabsorb SF6 decomposition products
and to keep the SF6 dry. Each pole rests on a ball-typesupport
11.4. Fig (2- Next page) in this way, the flanged joints of the
modular assemblies isrelieved of strain. A section through a
breaker pole is shown in Fig (2- Next page)
