Engineering Photos,Videos and Articels (Engineering Search Engine): Alstom

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Monday, December 29, 2014

Alstom Frame 5 Turbine Assembling Photos

1st stage nozzle clamp right side

1st stage nozzle clamp

1st stage nozzle complete

1st stage nozzles installed

accessory coupling

accessory coupling complete

1st stage shrouds and 2nd stage nozzles installed

1st stage nozzles installed

all pipes installed

all transition pieces in machine

assembling accessary coupling tunnel

assembling pipes (2)

assembling first st. shrouds and second st. nozzles

assembling exhaust plenum

assembling pipes

assembling second stage nozzles

bad welding exhaust

bad welding

bearing nr.1

bearing no. 2 installed

bearing no.1 complete

bellmpouth installed

bottom of 1st stage nozzle with pin

broken bolt in support ring

cleaned coupling of rotor

cleaned and repainted bellmouth

broken cable piping

cleaning rotor for assembling 1

cleaning rotor for assembling buckets

closing bearing no.2

compleet bearing nr.1

combustion chambers installed

combustion chamber covers installed

compleet bearing nr.1

Thursday, July 26, 2012

SF6 Gas-Insulated Switchgear

Gas-insulated switchgear (GIS) has come to be a major piece of substation equipment. Over that period, GIS has been improved by technological advancements that have increased the interrupting capacity of the circuit breaker (CB) and decreased the number of breaks per single CB without using an air condenser.

The configuration of the GIS comes in several arrangements, such as the single bus, double bus, and ring-bus types. Because the arrangement is determined by a user’s specifications, we must create a different design each time.

Alstom 145kV Gas-insulated switchgear GIS

GIS offers high reliability, safety, and maintenance-free features in a much smaller space compared with conventional switchgear. The SF6 GIS guarantees outstanding advantages for the planning and operation of high-voltage supplynetworks. For instance, the space requirement can be less than 10% of the space taken up by an equivalent conventional installation.

As all live parts are metal enclosed and hermetically sealed, the SF6 GIS is completely immune to atmospheric pollution (fog, sand, salt, etc.) and industrial pollution (dust, smoke, gas, etc.). With SF6 GIS, all foreign bodies (persons, animals, and tools) are prevented from coming into contact with live parts. This ensures maximum safety to personnel and increased continuity of operation.

Main Features

High reliability: The live parts are sealed in metal enclosures filled with pure SF6 gas. Thus, the switchgear is protected from contamination by smoke, chemical fumes, dust or salt-laden spray or by the ingress of small animals. This protection prevents the inside components from oxidation and rust caused by oxygen and moisture.

Space reduction: A medium-voltage GIS can be installed into a space about half that required for conventional air-insulated metal-clad switchgear.

High safety: All the live parts are fully enclosed in grounded metal enclosures. Thus, there is no danger of an electric shock. SF6 is an inert, nonflammable, nontoxic, and odorless gas used as an insulation and arc extinguishing medium. Therefore, it is safe for personnel and there is no fire hazard.

Short installation time: A GIS of about four panels can be transported fully constructed. The GIS can be energized by connecting external power cables to the prefabricated plug-in type terminals, thus shortening installation time.