General Information

Serial #

X12/ P3810205

Part Number

2

Total Parts

2

AKA

N/A

Patents

N/A

General Description

Unknown

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

27.9 cm

Width

16.5 cm

Height

20.3 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Radio

Sub-Category

N/A

Manufacturer

AKA

SCOTT

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Ontario

Period

Unknown

Canada

A piece of equipment used at the David Dunlap Observatory at the University of Toronto, one of Canada's most important astronomical observatories. The David Dunlap Observatory opened in 1935 as the result of a bequest from the wife of David Dunlap. The telescope was a 74 inch (188 cm) reflector built by Grubb Parsons of Newcastle-upon-Tyne in England. The 74 inch was then the largest telescope in Canada (surpassing the 72 inch telescope of the Dominion Astrophysical Observatory in Victoria) and became the second largest in the world after the 100 inch Hooker Telescope of the Mt. Wilson Observatory outside Los Angeles. DDO's reputation grew and following WWII, it began to graduate most of the astronomers produced in Canada with University of Western Ontario far behind. Beginning in the 1960s a number of other astronomy departments were created but UofT/DDO held its place, a position it probably still holds. The DDO had a good technical staff which gave them an advantage and, with most of the 1940s to early 1970s top astronomers coming from UofT, grants from NRC and then ENSERC were almost guaranteed and allowed UofT's top astronomers -- Hogg, van den Berg, Fernie, Bolton, Kamper, Martin, etc. to acquire or build some of the best equipment available in university observatories. For optical observatories, only the DAO had technical staff and budgets that surpassed those of DDO. In 2007, citing increasing light pollution, the University of Toronto announced plans to sell the Observatory property. In June 2008, it was sold to Corsica Development Inc., a subsidiary of Metrus Development Inc. and the Observatory was closed. In 2009 the Observatory buildings and 80% of the site were designated a cultural heritage landscape. Also in 2009 Corsica and the Royal Astronomical Society of Canada, Toronto Centre announced an agreement allowing the RASC to provide public education and outreach programs at the observatory, and to operate the 188 cm telescope.

Function

An uninterruptible power source or supple (UPS) is an electrical apparatus that provides emergency power to a load when the input power source, typically the utility mains, fails

Technical

The APCC model 330 XT Uninterruptible Power Source provided protection for critical loads, such as a computer system or sensitive electronic instrumentation, from disturbances occurring on a commercial utility power line. These disturbances included: brownouts, blackouts, spikes and surges, switching transients, momentary sags in voltage, radio-frequency interference and electromagnetic interference. The 330XT was totally self contained and could provide dependable backup alternating current power for loads up to 330 volt amps or 200 watts for periods from 6 minutes to several hours depending on the size of the load served [Ref. 2] . A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide instantaneous or near-instantaneous protection from input power interruptions by means of one or more attached batteries and associated electronic circuitry for low power users. American Power conversion Corporation was founded in 1981, with headquarters in West Kingston, Rhode Island. It produced its first uninterruptible power supplies in 1984. In 2007 it was taken over by Schneider Electric.

Area Notes

Unknown

Details

Markings

N/A

Missing

CHROME PLATING POOR

Finish

Unknown

Decoration

N/A