ARTIFACT WORKSHEET

OH NO.: OH0852.004

Worksheet completed by: Suzanne Beauvais Collector: Anna Adamek

Group: Énergie électrique/Electric Energy Category: Mesurage/Measurement

Article: indicateur de kilowatt-heure maximum/ demand kilowatt-hour meter

Type: Revenue/single phase/2 wire

Model: RO

Serial number: 3245203Manufacturer: Westinghouse Electric & Mfg Co.

address: Pittsburgh, PA, U.S.A.Year manufactured: 1913-1924

Distributor:address:

Source: Ontario Hydro

Dimensions: l. w. h. Weight:

Function: Un compteur combinant la fonction de mesurer l’énergie en kilowatt-heure utilisée et la demande maximum de pouvoir (kw)A COMBINATION METER USED TO MEASURE AMOUNT OF ENERGY in kilo watt-hour USED & MAXIMUM DEMAND OF POWER (kw)

References:F. EGAN, CCAC, SUPP.INFO., P.15, #127)/

DEPT. OF TRADE & COMMERCE MEMO #111: MAX. DEMAND INDUCTION WATT-HOUR METER TYPE RO, APPROVED OCT. 14, 1914/

Electrical Metermen’s Handbook, 1950, p. 465, 482. 599.

Patent references: PATENTED AUG 9 1898, DEC 30 1902, JUNE 5 1906, JUNE 26 1906, MAY 14 1907, MAY 11 1909, AUG 3 1909,OCT 31 1911, JAN 7 1913, JULY 22 1913

Period of use: Area of use:

Significance to Canada:

Fait partie de la collection Hydro-Ontario. Cette collection acquise par le musée des sciences et de la technologie du Canada en 1992 documente la culture matérielle de l’histoire de l’électricité et ses usages.

Part of the Ontario Hydro Collection. This collection was acquired by the CSTM in 1992. It documents the material culture of the history of electricity and its uses.

Significance to technology:

Un compteur indicateur de maximum est habituellement équipé de deux aiguilles, l’une rouge qui indique la demande en temps actuel et une noire qui indique la charge maximale de la depuis la dernière lecture.

.A demand meter is normally equipped with two pointers (one red which indicates your actual/real time demand and one black pointer which indicates your peak since the last meter reading) which register the demand or the maximum rate at which electrical energy is delivered.( https://www.nbpower.com/en/products-services/business/demand-and-energy/reading-your-demand-meter/)

Materials: metal, verre, cartonMissing parts: plaque du terminal en bas et une aiguille ?Comments: Spécifications : 5 Amperes, 100 Volts, 2 Wire, 60 Cycles Time interval 15 minutes, watthours per revolution of disc 1/3

MODEL: STYLE NO./ A COMBINATION METER, MEASURING BOTH ENERGY & DEMAND. IT HAS A MECHANICAL DEMAND POINTER & A KILOWATT-HOUR REGISTER. POSSIBLY USED IN EARLY COMMERCIAL SERVICES WHERE THEY WERE INTERESTED IN RECORDING THE MAXIMUM DEMAND BECAUSE LIKE TODAY, THE COMMON PROCEDURE FOR BILLING COMMERCIAL & INDUSTRIAL CUSTOMERS INCORPORATES BOTH THE ENERGY & THE PEAK DEMAND (F. EGAN, CCAC, SUPP.INFO., P.15, #127)/ DEPT. OF TRADE & COMMERCE MEMO #111: MAX. DEMAND INDUCTION WATT-HOUR METER TYPE RO, APPROVED OCT. 14, 1914/

Nous avons dans la collection un modèle plus tardif du modèle RO de Westinghouse, dont le globe était en métal. La version plus récente représentée par OH0852.004 a un globe en verre.

PHOTO 1

PHOTO 3

PHOTO 4

PHOTO 6

PHOTO 7