The main switchboard has been delivered to site and is currently being installed. It is approximately 7.5m long and has been designed to support a total of 2200amps.
In addition to the main switchboard, there are 2 UPS distribution boards (for the A+B power) and 13 local distribution boards spread around the whole site. The UPS boards are also in position and are being wired up.
Every day there is noticeable progress at the Sydney CLS. The major civil works are drawing to completion with the internal walls and concrete slab roof having been installed within units 13 & 14. The slab roof has been installed under the existing galvanised iron roof to provide a solid platform for the cable tray work as well as acting as a secondary barrier for the safety and security of the facility. The masonry walls have been installed between different rooms to ensure that each operational area has a two hour fire rating.
Sealing and painting of internal walls has begun and the office mezzanine area is beginning to look like an office, with gyprock walls plastered and painted, and the new bathroom installed. The installation of electrical cabling through out the buildings as well as the air-conditioning, UPS and DB installation in the battery room are proceeding at a great pace. Not surprising, given an inspection visit on Sunday afternoon found the job site humming with electricians and air-conditioning technicians hard at work. Shipping container congestion may be a challenge over the next week or so as more deliveries arrive.
The Data Communication Network (DCN) provides the network over which the various network elements of the system talk to each other. The information that passes through the DCN uses the wide and local area networks at each cable station. For PPC-1, the DCN provides voice and data services across all network connections. The DCN for PPC-1 consists of routers, Ethernet switches, and engineering order wire voice over internet protocol (EOW/VoIP) telephones. The figure above shows the proposed DCN configuration for PPC-1.
A high voltage self-holding power switched branching unit (HVSH PSBU) is used in the PPC-1 system. As the described in the earlier blog on BUs, branching units have typically three ports, the trunk and the 2 branch legs.
These three ports are connected to each other through a diode bridge to power the control electronics during a normal power switched state. The amount of power going through the BU can be as high as the maximum voltage provided by the power feed equipment. To ensure safety of personnel and equipment during repairs and/or maintenance, the electrical connectivity among these ports can be altered to isolate certain system segments. Using an optical signal, the connections can be either fully grounded, one of the legs are disconnected and grounded, or the trunk is directly grounded. The decision on which leg would be disconnected and grounded depends on the various powering configurations of the network.
The construction works at the Sydney Cable Landing Station are moving at a rapid pace now. The last week has seen the fire-rated block walls built, filling in the spaces where roller doors were. The cable riser penetrations have been cut and most of the cabling for the power system is installed on cable trays ready for the switchboard installation in the next week. The final details have been put to the terrestrial fibre duct routes and the construction work on these is due to start once the builder has cleaned up and left site.
Work in the Cable Landing Station in Sydney is progressing well with the struts to support the cable tray being installed. The photo above just shows the tray for the switchroom. The position of the switchboards has also been marked out to ensure that the tray is put in the right places.
The core holes and penetrations between the different rooms and outside are drilled and the unnecessary toilets have been removed.
In connecting Sydney to Guam, PPC-1 must cross a number of pre-installed cables that are already on the seabed. In our case we are crossing the APNG2, Southern Cross, Gondwana-1 and Australia Japan in service cables. The undersea community works to a number of guidelines set out by the International Cable Protection Committee (ICPC), which define the crossing angles and the cable types used at each crossing point. A bit like traffic rules for submarine cables.
Pipe International has been in extensive discussions with all the cables we will be crossing and we are pleased to report that as of 14th April 2008 we have received the final approval in principal for the PPC-1 route. The figure above shows the crossings off Sydney.
This is the lead-in manhole for the primary terrestrial fibre backhaul. The Sydney cable landing station can be seen in the background. The fibre that will be installed in here will connect the data centre in the CLS to Pipe Networks’ metro fibre network. Eventually the fibre will terminate in the data centre into Tyco FIST-GR2 racks.
The diverse link is currently under construction.
This is the architect and engineer going up onto the roof to mark out the space for the Air Conditioning units.
The unit on the right will be the Data Centre, and the one on the left will house more Data Centre space as well as general office facilities.
As with all our other Data Centres, a number of modifications will need to be made in both these units to ensure it meets our strict standards. These will include upgrading the roof to support air conditioning units and cable tray, a Vesda fire system, a FM200 gas fire suppression system.
Our cable landing station at Cromer in Sydney consists of 4 units in a newly constructed industrial complex. In order to fit the necessary equipment, a number of modifications will need to be made.
Two of the units will house the plant for the Data Centre. This includes the switchboard, battery UPS systems and standby diesel generators with an external fuel tank.
To fit all of this equipment in, there will be a number of physical changes to the units, including the blocking up of doorways and installation of a FM200 fire supression system.