page_title: KES Class A
section_title: Specifications
hierarchical_section_title: KES Class A / Specifications
caption_attribution_description: English: Kristiania Elektriske Sporvei Class A trailer 17 in Stortingsgata.Norsk bokmål: Blåtrikk tilhenger 17 (fra 1894) type Kühlstein i enkeltspor ved Rosenkrantz' gate i Stortingsgata. Saras Telt (Sara Gravesens uteservering) til venstre, Stortinget i bakgrunnen. Gatebilde. (Trærne langs Eidsvolls plass er unge her!)
context_page_description: Class A was a class of twenty-one trams and twelve trailers built by Allgemeine Elektrizitäts Gesellschaft and P. Herbrand & Cie. for Kristiania Elektriske Sporvei for use on the Oslo Tramway of Norway. The units measured 6.4 by 2.0 meters and featured a wooden superstructure with an indoor cabin and open platform bays. This gave a capacity for sixteen seated passengers. Each twin-axle unit was equipped with two motors. Eighteen of the units had a power output of 24 kilowatts, the other three 36 kilowatts. One unit was built by Norsk Elektrisk and Skabo.
  The first series of eleven trams and seven trailers were delivered for the company's opening of services on 2 March 1894. A further four trams were delivered in December and two more in 1897. The Norsk Elektrisk unit was bought in 1897 and the next year the three more powerful units were delivered. The last batch of trailers were bought in 1899. From 1910 the class was too small and the motor units were rebuilt to trailers. From 1917 they were again modified, this time merging two and two to make a larger trailer. The original trailers were in service until 1936, while the larger units remained until 1949.
context_section_description: The trams were built with very similar specifications, although there were a few variations. Painted green, all units measured 6.4 by 2.0 meters (21.0 by 6.6 ft), except units 118–120, which were 6.50 meters (21.3 ft) long. All had an open bay platform with roofs at each end and a center cabin, with benches in the longitudinal direction. The cabin had five equally-sized windows on each side. The windows were later changed to three, in a long–short–long pattern. They had a wooden superstructure, but were clad on the inside with thin iron sheets.  The trams would seat 16 passengers and 12 could stand, in addition to the motorman and conductor. All the units weighed 6 tonnes. They were twin-axle with a wheelbase of 155 centimeters (5 ft 1 in) and a wheel diameter of 845 millimeters (33.3 in). The trams originally had a skirt, but these were soon removed as they caused problems during operations.
  All trams except no. 117–120 were delivered with two NB80 motors from AEG. These each had a power output of 12 kilowatts (16 hp), giving a combined effort of 24 kilowatts (32 hp). No. 118–120 were delivered with the more powerful VNB120, each with a power output of 18 kilowatts (24 hp), for a total 36 kilowatts (48 hp). These were both bipolar serial direct current motors organized as a compound motor. This allowed the speed to be regulated through the altering of the three spools between series and shunts, predefined in seven switches. In addition they had switches for reverse and emergency breaking. Power was collected through a trolley pole. All units were delivered with clamp brakes for operation and a dynamic braking through shorting for emergencies.
  One of the trams, no. 117, was a prototype built by Skabo with motors from Norsk Elektrisk & Brown Boveri. It had the same dimensions and general design of the other units, but had two NEA1 motors, also rated at 12 kilowatts (16 hp) each.
  The first trailers had the same dimensions as the motorized vehicles. This consisted of a 4.2-meter (14 ft) long cabin with eating for 16, although the lack of a motorman allowed for 18 standing passengers. The second series was 7.2 meters (24 ft) long overall and had 4.5-meter (15 ft) cabins. Unlike the first series which had longitudinal seating, the second series received two plus one abreast seating, with seats in opposing directions.
caption: Trailer 17
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